通过文件 IO 统计,本题的官方数据输出 NO 和 YES 的数量如下所示:
| 数据点 | NO | YES |
|---|
| 1 | 41 | 9 |
| 2 | 46 | 4 |
| 3 | 46 | 4 |
| 4 | 1000 | 0 |
| 5 | 1000 | 0 |
| 6 | 1000 | 0 |
| 7 | 1000 | 0 |
| 8 | 1000 | 0 |
| 9 | 499968 | 32 |
| 10 | 499977 | 23 |
| 11 | 499975 | 25 |
| 12 | 499982 | 18 |
| 13 | 500000 | 0 |
| 14 | 500000 | 0 |
| 15 | 500000 | 0 |
| 16 | 500000 | 0 |
| 17 | 499997 | 3 |
| 18 | 499997 | 3 |
| 19 | 499992 | 8 |
| 20 | 499999 | 1 |