和方数
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Description
对于一个正整数n，如果所有小于等于n的数的平方和1²+2²+...+n²是一个完全平方数，那么我们称n为一个和方数。请问在1(包含)到10000000000(包含)内有多少个和方数？
Format
Input
无
Output
直接输出答案以验证正确与否
篮球杯训练计划-基础训练
- Status
- Done
- Rule
- XCPC
- Problem
- 8
- Start at
- 2024-1-6 13:15
- End at
- 2024-1-7 13:15
- Duration
- 24 hour(s)
- Host
-
admin
- Partic.
- 17