#Z000001. 求第几项
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ID: 1073
Type: Default
1000ms
256MiB
Tried: 8
Accepted: 0
Difficulty: 10
Uploaded By:
求第几项
No testdata at current.
题目描述
对于正整数n,m，求s=1+2+3……+n，当加到第几项时，s的值会超过m？
格式
Input
输入m。
Output
输出n。
Samples
1000
45
Limitation
1s, 1024KiB for each test case.