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-rw-r--r--2023/03/Makefile15
-rw-r--r--2023/03/resources/input.txt140
-rw-r--r--2023/03/resources/input_small.txt10
-rw-r--r--2023/03/src/part1.cpp79
-rw-r--r--2023/03/src/part2.cpp97
5 files changed, 341 insertions, 0 deletions
diff --git a/2023/03/Makefile b/2023/03/Makefile
new file mode 100644
index 0000000..2f375fd
--- /dev/null
+++ b/2023/03/Makefile
@@ -0,0 +1,15 @@
1CXXFLAGS := -std=c++17
2EXE := part1 part2
3
4.PHONY: all clean
5
6all: $(EXE)
7
8%.o: %.cpp
9 $(CXX) -c $(CXXFLAGS) $< -o $@
10
11clean:
12 rm -rf $(EXE) src/*.o
13
14%: src/%.o
15 $(CXX) $^ -o $@
diff --git a/2023/03/resources/input.txt b/2023/03/resources/input.txt
new file mode 100644
index 0000000..e89c547
--- /dev/null
+++ b/2023/03/resources/input.txt
@@ -0,0 +1,140 @@
1........936..672.........846.922........359...332......582..856........................579..93......674..740.....243.156....................
2...........%.........4=...*...*........*.......*......#....................806..481.........................*.......*.........900......$564.
3.............520........624.965....143..405.....960.............273...651...*....*.........554....139@.....38...*.........58..*...392.......
4................$....................*.........................*.....&......634.3..../.................-......310....*313.*.........*.......
5...196....544......541................775.216...+557..225/..463.......................517..........960.228........452.....593.......772.....
6.....*....*...654.*........638............*...........................163....................386#......................20......169..........
7.....566..20...$...132........*969......747........*971..342............=.245*.......................277.522............*..............+....
8.............+..............................205.716...........................855.............324......................871..752.........291.
9.........47..390.......128...%....528........%..........91*192.......=.....................=.#.............%..852*156......+................
10.....975..*.......=....*...322.......#............&63.............946...................462....939..520...268............#.....*....380.....
11.........55..=.....871..68.............................................491.......................*.....*............674.770.333.415...*.275.
12..............633...........@.....642.5........+.......739........632.....*.......992.74.615...858...998.............*..............761.*...
13....446......................180./..../........83...&.....*924....&........379...*......................................................118.
14...........488*240.......150......................958..........$.....&...........964...351...........+..633.........123....../603...........
15...................987....../........546-...674...............466.....602.............@...........956..#............./......................
16......503=....465.................91.........*..........................................583..............128..124..........$.....217........
17..............*...32$..53....&594.........648...827....*..994.......971...................*..........304...%....*.......387..80.............
18............756.......#..........................*..888...$............@....339.......+..868........*........851..............*.........128.
19...905-.........312..................729...356*.697.........736.....+.......+.......748.......797....41....................272..753.........
20.................*....&604............*.............%915.......*.529..889...................*.........................992.........*.....718.
21...........272....487..............+...961.892..............632........*.................502.118....141................@......546.669.......
22787..........*....................85............/..330...........-...374.............................*.........446...%.........*............
23....-...../...120....919&.....................339....*....*663...403........167...533.170.............698..587...*....279.......776.+.......
24.575.....34.*.................668...19..759.......804..730...../.............*...........*.....789...........*....803......666.......25.....
25............375...773*.............*.........................$.876...287......201........484......*.........196.............................
26565...866.............23..477...455....................794.996.........*.....................887.959...146...........496....790.............
27..............648...........+........325.738....156.....*.........534..941.....%536..31..../.%...........*............*.....*.......511.....
28..............*.................166.....*......*.....647..........*......................262...........887..210.3..860.....161....4....*420.
29......141.606...........193.111..*..........252......................935*689..................500...........*...*.................*.........
30..635....*........=........*.....959.....................@834.................-.....542..547....-..........770.8...........439..............
31.................896.........93......................244..........@......247..735..*.................................497.............%......
32...............................%........................*..........200....+.......342.613.245.@............$.........#....*.......176...21..
33......51......702.37.......798....325.....&974.....834.860.....+.........................*.....533..866....864.............269..............
34..141..*......................-...&............875*.............207...882*.........................*............309.739........%......../...
35.......394....144.....................................$...................835.3..........290.......489...........&.....*177.833....866$.153.
36.689.................719.314/..$......673.....5*557...443......+..#649.............575....*..634*...........................................
37....&...........794...*........614...*......................350.............411......*.104.......141........369...934...........997.........
38.......519......*...787..............739.....628...................................784.......$..........989*........*...987.......*....#....
39.........*...309.........209.............957*........50.....@995...765.......269.@........380..624.................643.....*....836...356...
40......886............234.+....................51*935..*...........*.....188.......73..............*696...14.....#...........................
41............203..948...&...............................957......804.736*......388....689.219*660........*.....218....................$..40..
42..............*.....*.....475.....930..........%................................*......*..............477.624................848...687......
43....57*.50.229....636....*.................804.164....590.........-....547..80..310....675.......=.@...........................*............
44........................398......&........*..............*.....748...........*................226..200................160......853..........
45......292........................889.......867.....365...............192+..530.........................@910....=..222*.............894......
46..427....#.../...959........................................322.....................735*304....742..........195..........$..............22..
47...........465..-.........52.$......168.......418.......+.........................................$..............&......563...649*26........
48....................464..../.969....*......-..*........150......724.....83..301...............527...............858.506.....................
49...935.........910....+...........116....427...347.............-........*.....=.......891.......*....847...750........@................531..
50....*.........$.........676...............................510............11.......647.*.................#.....%.683.............193...+.....
51....761.169...............=...524........&......152..........*...975.994.........*....122..........858*...........%.......776...........*...
52...........-..180/.850..............$.....524....-...........940.=......*......199........963..............#........836...*.....34...543.448
53482...947...................94&....541..............265..............477..890..............*....988.....343..........&...599....+...........
54.......*...532..81..73..417............992/...99&...#........................*.33@.149..305.........678.....31.........@.................417
55....304.....@.....*...#../....452.842.................519.....307.949.....268................=.........*....*...........259.................
56..................361............*.......346............*.+......*...........................288.......492..985.............727.683.........
57....530....438..........950..........*......*........787..316...............762.724.257..889.....................844.......*......=....@125.
58..............*...446...*......879..827......148......................*730.......@..........*...832...............*.......647.......48......
59....500.......994........41.......*.....#805...........*...........614...............*....940................291&.129.8............=........
60....*...#..........698..........581.................940.462.....@......443...82.784.593......../.#375..%148............*..#.................
61.....39.562...784............................................805...$......@...*..*..........844.....................776....363...667........
62................%...265.......337.....438...295.....................499......341.74..................271.405.......................%.155....
63.........97..........*......@....*252.*......*....+.........270.229.................394...879*247.....*...*.....146.....................*...
64........%.............226..258........996.944......793........*.../...................+..............321.578.....$..........838.....529.831.
65.................%109.........................................615....822.....................501.............616....293.....&........-......
66.......%....482...........................%717.236.......562...........*...........915...580....*............*.....+..........230...........
67.....303.......*128..86&......762.928.............$........*......861*.311........*....../....517..........471.544.....996.......*38...628..
68...........563............89.*......*.583...%.148.......$.987...................35..................996...........=....*...............*....
69......776.....+...........*......967...@..168...*.....772.........838*.....480..............................-........976..............530...
70................649*32...84.#...................315...................37............398.656...631..........340.985*..........522............
71............................922........................./.173....894................*.........$....................177.......#..............
72......................................................423....*....*.....816.........13.................=..............................251...
73..154...................878*......................568......723..329....&......928.................-71.123.378..100...................*......
74........*21..250............448.734.718.....&....*......................................599...............%....*.....700+.....*803..401.....
75.779.550........*.817............./..*....118....980..589.....235......=....539...........*...281*236..........591.........927..........*...
76...-.................*...............854.............*.................911.=............939........................616..*............770.50.
77.............82......399.......452..................184........643..........................*871..................*....370..................
78.185.405.....*...634............*......189.838.................*...............@623......252...........315.86.....568...........157.104.....
79...&......586.......*........957..........*.......841.........509.600........................896..565.....*...............+............*....
80..................633.628...........811..........*.....677.........-..580..751...183.........................540.81.......656..665..634.....
81......112.............*.....=........./.322...430.........*..........+.....*...............683............$.....*...........................
82830&...*..426........649..910...........*................717..359........831........=..157..%.............143......758................579...
83.....373....*..................215.......666....................*.#...........459..547...+.........773.........980*.........404...126.......
84205......636....................*...420.......440..........225.11.516...568....*......................*....474........620...*.....*.........
85..............250......685...209.....+...........*257.................../...407.......295..498....122.............970...@.392.412...........
86783..83+...........706....=.................330*............833.................*250....%..=..........%...........*............#....898.....
87...........$....................................398..35........*......646....759.....#.............527..........160.....254.................
88500........777...........112..428...663....957#..............524.....*..../........249..530*672............567......*......*759.....284*....
89....861....................*.*......*............*...277*832.....644.130..216.446............................*...683.955................950.
90....*........826..........68.535..192.........306..................#..................762%...%....#631..500.406..........763...137..........
91..65............-...499=..................546.....&.........$........../..........177........988.......@.............336...*..*.............
92.....362..................@...$..........-....610..65......64.........830..........-...........................452......+.604.542...........
93........*902.633*........873..63.....781...31...*.................258.....12...681..........18*........&...&............................848.
94..803............752.........................-.....672...................*.............................470..86.59.......%...................
95.......@..547..........$...184.......320..........+..........471......834...=...551..108.............................176.................82.
96..950.562............261...$.....754..+..............134.654*...............778..&......%..713.837.......................329........186.....
97............112..72...............*..........917......*.................415............................946....=....614.....*................
98..............*.$......850.....766.....308.....*....666................*......812.....293................*.624.......%..296.....612...333...
99..996......154...........................*......283.....*.555.%........................-.......552.714.563.......227..............-.........
100....*.682.................=.......281.217..............84.*....908.....@...=....522..............$.*.......630......*79..............556....
101..635...*............516...402............................333........114..496..*.......324..........522.....................................
102.........511....779...*............@............350.853.........................791...................................$.....821.....+.......
103.................*.....486........984......332.....*..............893..730*480...................756...................776...........155....
104......161......57..590....................@....398..................*....................477.....*......602....506............996...........
105.151.....*..=.......*......955.......916........#.....=..269.........423..........289......*..379...*..@.....................*..............
106...-....123..927.600...........-........*395........226./....676*755...........30..........58.....582.........671.118..43.367...943......478
107.....................725........74...............................................+...........................-......*..*................&...
108........378......563*.....*999............*...................497.349...26.....$............362.........&........723....20....717...317.....
109...*....................22.........../.575.552..........291......*..........600......152.../......./...169......................-.@....*977.
110886.250..........$.............383.603.............36*.../....%......................*.............253........215..........139....583.......
111................225............................................721...814..............829..................*.......613*544.*...=........901.
112..........741.......595.........785.............%677..50................=.................252......710....91...............912.180..........
113...........*...................*....808...956..........+.....812...............*381......*.....676.../..........599....................+....
114............134.184......759..81...*.........*.782........41*......=....125.216........679...../..........@........*.................567....
115.......165.........*......@................66...*.....*.........379.....................................&..626...241........................
116.........*.........232.........387.86...........635.47.806.857.........$537...............240........617..............806..941..........531.
117.......687...654.......735......*...$......................%.....357..............*884.......*571..........273.551......*.....*....576..*...
118............*................648...................716.304..........*...690....663.................*38...........*....365......911....@..424
119....67*156...250..828...................&222.......#...*......16....300.+..................-....-.9....813...982..443.......................
120.....................*......136..757..................65..314...*........................615.291.......&....*................972............
121................721..592...@.............................../...808.............665...176.............................200.....*..............
122..198..459+............................218........-772..............169...39..*........*........939..742......#....=......532...#..264......
123.....*...............$..........713...*............................*.....*...831....689...589*.......*.......91....75.........641...#.......
124..896..167*........372...138...........462...*227..$.....801......512.........................775.673.......................................
125...............47........*.......135...............725.....*...............743..........489*.............735..622.815.551...........519.....
126.......=........*......636.987...*...................................827........496*........48.121................*.....*........#.....*311.
127....525.......819.580.........#.369......119...............77.........*...............10*........*.%.....975.....961....888......304........
128........................96*..........................816............857......=...........376...859.522..=...................................
129629...419..259...#360.......44%.........190..=969...........=...539.....-913.429......................................119.....476...707.....
130...*.....*...*....................*906.*.....................84.....286...............$...=...127.200.465........324.............=.....*599.
131905.....762...262.....-597.....847......311......@654...837............*....455..37..439..147....*.....*...262...*.....787..778.............
132...........................25...........................=...........908....*.......*................827......%....567....-....#.427..819....
133..............................#.$....643=...............................886......243....../.....672..............................*....*.....
134...........185*....107.....226..965........$.................756........................808.221...-.../574...541&...+....871...326....349...
135......................*.....................841.....=...........*688........177................*....................166....*................
136.......189..744......308.......99*391..630/........463......................@...930..........543..........................519...............
137..984.%........-.741.......................................522.915+.....769......*................207....976.....158*.......................
138....*...............*...............&.331...787........48...........224..*......184........874.......=.....*........................537.....
139.....934....*339...829....495.....682...*.............*....+..........*..794..........-430...*....&........848..367....+............*....505
140.........175..........................381............270....198......911...................52......642...............45............445......
diff --git a/2023/03/resources/input_small.txt b/2023/03/resources/input_small.txt
new file mode 100644
index 0000000..b20187f
--- /dev/null
+++ b/2023/03/resources/input_small.txt
@@ -0,0 +1,10 @@
1467..114..
2...*......
3..35..633.
4......#...
5617*......
6.....+.58.
7..592.....
8......755.
9...$.*....
10.664.598..
diff --git a/2023/03/src/part1.cpp b/2023/03/src/part1.cpp
new file mode 100644
index 0000000..9cd1622
--- /dev/null
+++ b/2023/03/src/part1.cpp
@@ -0,0 +1,79 @@
1#include <iostream>
2#include <fstream>
3#include <vector>
4
5using Schematic = std::vector<std::string>;
6
7bool check(const Schematic& schematic, int x, int y)
8{
9 return x >= 0 and y >= 0 and x < schematic.size() and y < schematic[x].size()
10 and schematic[x][y] != '.' and not std::isdigit(schematic[x][y]);
11}
12
13bool check_adj(const Schematic& schematic, int x, int y)
14{
15 return check(schematic, x - 1, y - 1)
16 or check(schematic, x, y - 1)
17 or check(schematic, x + 1, y - 1)
18 or check(schematic, x - 1, y)
19 or check(schematic, x + 1, y);
20}
21
22int find_nums(const Schematic& schematic)
23{
24 int sum{};
25
26 for (int x = 0; x < schematic.size(); ++x)
27 {
28 const std::string& line = schematic[x];
29
30 int cur{};
31 bool adj{ false };
32
33 for (int y = 0; y < line.size(); ++y)
34 {
35 if (std::isdigit(line[y]))
36 {
37 cur = 10 * cur + (line[y] - '0');
38 adj = adj or check_adj(schematic, x, y);
39 }
40 else
41 {
42 if (cur > 0)
43 {
44 adj = adj or check(schematic, x - 1, y)
45 or check(schematic, x, y)
46 or check(schematic, x + 1, y);
47 sum += adj ? cur : 0;
48 }
49 cur = 0;
50 adj = false;
51 }
52 }
53 }
54
55 return sum;
56}
57
58int main(void)
59{
60 int answer{};
61 Schematic schematic{};
62
63 std::ifstream input{ "resources/input.txt" };
64 if (input.is_open())
65 {
66 std::string line;
67 while (not std::getline(input,line).eof())
68 {
69 line.push_back('.');
70 schematic.push_back(std::move(line));
71 }
72 }
73 input.close();
74
75 answer = find_nums(schematic);
76
77 std::cout << answer << std::endl;
78 return 0;
79}
diff --git a/2023/03/src/part2.cpp b/2023/03/src/part2.cpp
new file mode 100644
index 0000000..16e9678
--- /dev/null
+++ b/2023/03/src/part2.cpp
@@ -0,0 +1,97 @@
1#include <fstream>
2#include <iostream>
3#include <map>
4#include <vector>
5#include <cmath>
6
7using Schematic = std::vector<std::string>;
8using Gears = std::map<std::pair<int,int>,std::vector<int>>;
9
10void check(const Schematic& schematic, Gears& gears, int num, int x, int y)
11{
12 if (x >= 0 and y >= 0 and x < schematic.size()
13 and y < schematic[x].size() and schematic[x][y] == '*')
14 {
15 std::pair<int,int> key{ x, y };
16 if (not gears.count(key))
17 {
18 gears.insert({key, std::vector<int>{}});
19 }
20 gears[key].push_back(num);
21 }
22}
23
24void check_gears(const Schematic& schematic, Gears& gears, int num, int x, int y)
25{
26 int len = 1 + static_cast<int>(std::log10(num));
27 check(schematic, gears, num, x - 1, y - len - 1);
28 check(schematic, gears, num, x, y - len - 1);
29 check(schematic, gears, num, x + 1, y - len - 1);
30 for (int a = 1; a <= len; ++a)
31 {
32 check(schematic, gears, num, x - 1, y - a);
33 check(schematic, gears, num, x + 1, y - a);
34 }
35 check(schematic, gears, num, x - 1, y);
36 check(schematic, gears, num, x, y);
37 check(schematic, gears, num, x + 1, y);
38}
39
40Gears find_gears(const Schematic& schematic)
41{
42 Gears gears;
43
44 for (int x = 0; x < schematic.size(); ++x)
45 {
46 const std::string& line = schematic[x];
47
48 int cur{};
49
50 for (int y = 0; y < line.size(); ++y)
51 {
52 if (std::isdigit(line[y]))
53 {
54 cur = 10 * cur + (line[y] - '0');
55 }
56 else
57 {
58 if (cur > 0)
59 {
60 check_gears(schematic, gears, cur, x, y);
61 }
62 cur = 0;
63 }
64 }
65 }
66
67 return gears;
68}
69
70int main(void)
71{
72 int answer{};
73 Schematic schematic{};
74
75 std::ifstream input{ "resources/input.txt" };
76 if (input.is_open())
77 {
78 std::string line;
79 while (not std::getline(input,line).eof())
80 {
81 line.push_back('.');
82 schematic.push_back(std::move(line));
83 }
84 }
85 input.close();
86
87 Gears gears = find_gears(schematic);
88 for (const auto& [_, vals] : gears) {
89 if (vals.size() == 2)
90 {
91 answer += vals[0] * vals[1];
92 }
93 }
94
95 std::cout << answer << std::endl;
96 return 0;
97}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-06 11:21:35 +0000