14 lines
267 B
Python
14 lines
267 B
Python
def solve(N, H):
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arrow = [0] * 1000001
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for h in H:
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if arrow[h]:
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arrow[h] -= 1
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arrow[h - 1] += 1
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return sum(arrow)
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if __name__ == '__main__':
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N = int(input())
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H = list(map(int, input().split()))
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print(solve(N, H))
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