1 files changed, 33 insertions, 0 deletions

diff --git a/2023/15/src/part1.cpp b/2023/15/src/part1.cpp
new file mode 100644
index 0000000..6473d20
--- /dev/null
+++ b/2023/15/src/part1.cpp
@@ -0,0 +1,33 @@
+#include <iostream>
+#include <fstream>
+
+int main(int argc, char* argv[])
+{
+    int answer{};
+
+    if (std::ifstream input{ argv[1] }; input.is_open())
+    {
+        std::string line;
+        std::getline(input,line);
+
+        int hash{};
+        for (unsigned char c : line)
+        {
+            if (c == ',')
+            {
+                answer += hash;
+                hash = 0;
+            }
+            else
+            {
+                hash += c;
+                hash *= 17;
+                hash %= 256;
+            }
+        }
+        answer += hash;
+    }
+
+    std::cout << answer << std::endl;
+    return 0;
+}