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[AtCoder]ABC-167|B - Easy Linear Programming
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提出結果
def getIntMap():
return map(int, input().split())
def main():
a, b, c, k = getIntMap()
s = 0
if a >= k or a + b >= k:
s = a if a <= k else k
else:
k -= (a + b)
s = a - (c if c < k else k)
print(s)
if __name__ == "__main__":
main()
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