D1P1 Done

src/day1/p1/main.cpp

@@ -125,13 +125,8 @@ auto parse(const std::string& filename) -> std::expected<std::vector<instruction
     return instructions;
 }
 
-int rotate (int state, const bool direction, int number) {
-    if (direction) {
-        // Right (positive)
-
-    } else {
-        // Left (negative)
-    }
+int rotate (const int state, const bool direction, const int number) {
+    if (direction) { return (state + 100 + number) % 100; } else { return (state + 100 - number) % 100; }
 }
 
 int main() {
@@ -143,10 +138,15 @@ int main() {
     }
 
     int state = 50;
-
-    for (instruction i : instructions) {
-        rotate(state, i.dir, i.number);
+    int password = 0;
+    for (auto [dir, number] : instructions) {
+        state = rotate(state, dir, number);
+        if (state == 0) {
+            password++;
+        }
     }
 
+    std::cout << "Password: " << password << std::endl;
+
     return 0;
 }