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28 lines
365 B
Python

#!/usr/bin/env python3
with open('input.txt', 'r') as f:
in_list = f.readlines()
in_list = [x.strip() for x in in_list]
in_list = [int(x) for x in in_list]
# print(in_list)
freq = set()
res = 0
i = 0
while True:
if i == len(in_list):
i = 0
res += in_list[i]
if res in freq:
break
freq.add(res)
i += 1
print(res)