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[AtCoder]ABC-355|A - Who Ate the Cake?
設問ページ
提出結果
def getIntMap():
return map(int, input().split())
def main():
a, b = getIntMap()
if a == b:
print(-1)
else:
print(6 - (a + b))
if __name__ == "__main__":
main()
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