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[AtCoder]ABC-074|B - Collecting Balls (Easy Version)
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提出結果
def getInt():
return int(input())
def getIntList():
return list(map(int, input().split()))
def main():
n = getInt()
k = getInt()
x = getIntList()
r = 0
for i in range(n):
r += (x[i] if x[i] * 2 < k else (k - x[i])) * 2
print(r)
if __name__ == "__main__":
main()
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