Here we go again

2018/1/part1.py

@@ -0,0 +1,3 @@
+import fileinput
+
+print(eval(''.join(map(str.strip, fileinput.input()))))

2018/1/part2.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+import fileinput
+import itertools
+
+
+def main():
+    x = 0
+    found = {x}
+
+    for line in itertools.cycle(map(str.strip, fileinput.input())):
+        x = eval('x{}'.format(line))
+        if x in found:
+            return x
+        found.add(x)
+
+
+if __name__ == '__main__':
+    print(main())