Solve day7

day7/part1.py

@@ -0,0 +1,21 @@
+from pathlib import Path
+
+FILE = "input.txt"
+
+def main():
+    raw_lines = Path(FILE).read_text().splitlines()
+    beams = {raw_lines[0].index('S')}
+    splits = 0
+    for line in raw_lines[1:]:
+        for i, c in enumerate(line):
+            if c == '^':
+                if i in beams:
+                    splits += 1
+                    beams.remove(i)
+                    beams.add(i-1)
+                    beams.add(i+1)
+    return splits
+
+
+if __name__ == "__main__":
+    print(main())