Solve a couple of 2017 problems.

2017/d8.py

@@ -0,0 +1,28 @@
+from collections import defaultdict
+
+
+def part_1(data):
+    regs = defaultdict(int)
+    allmax = 0
+    for line in data.splitlines():
+        match line.split():
+            case [reg_a, op, value, "if", reg_c, cmp, val_c]:
+                value, val_c = int(value), int(val_c)
+                reg_val = regs[reg_c]
+                if eval(f"{reg_val} {cmp} {val_c}"):
+                    value = value if op == "inc" else -value
+                    regs[reg_a] += value
+            case _:
+                assert False
+        allmax = max(max(regs.values()), allmax)
+    print(max(regs.values()))
+    print(allmax)
+
+
+def main():
+    data = open(0).read().strip()
+    part_1(data)
+
+
+if __name__ == "__main__":
+    main()