#1497. 求n的值
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ID: 1497
Type: Default
1000ms
128MiB
Tried: 0
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求n的值
说明
输入一个整数m,求恰好使s=1+2+3+…+n的值大于m时n的值。
输入 10
输出 5
输入1000
输出45样例