546A - Soldier and Bananas
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| Language | Python |
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| Owner | Bhuvan |
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| Visibility | Public |
def bananas(k, n, w):
total = k * ((w*(w+1))//2)
if total > n:
return total - n
else:
return 0
if __name__ == '__main__':
k, n, w = list(map(int, input().split()))
print(bananas(k, n, w))
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