CodeForces 限时随机挑战
挑战规则就是初始难度 *2400，积分为 \(0\)，每次在该难度随机一道题做，每题时限 \(50\) 分钟，如果 没有 AC 就 -1，否则 +1，如果积分 \(>6\)，那么难度 \(+100\)，积分清零，如果积分 \(<0\) 就难度 \(-100\)，积分为 \(6\)。
题解更新于做题记录。
| 日期 | 难度 | 积分 | 题号 | 时间 | 积分与难度变化 | 提交记录 | 备注 |
|---|---|---|---|---|---|---|---|
| 无 | *2400 | \(0\) | 无 | 无 | 无 | 无 | |
| 9.7 | *2400 | \(1\) | 1027F | 14min | \(+1\) | link | |
| 9.7 | *2400 | \(2\) | 802N | 21min | \(+1\) | link | |
| 9.8 | *2400 | \(1\) | 1184E3 | unac | \(-1\) | 无 | shit 题 |
| 9.8 | *2400 | \(2\) | 990G | 21min30s(-1) | \(+1\) | link | MLE*1 |
| 9.8 | *2400 | \(3\) | 1152E | 41min15s | \(+1\) | link | |
| 9.8 | *2400 | \(2\) | 273D | noac(-1) | \(-1\) | 无 | 阿拉丁题，TLE*1 |
| 9.8 | *2400 | \(3\) | 1333E | 29min26s(-1) | \(+1\) | link | WA*1 |
| 9.9 | *2400 | \(4\) | 758F | 26min48s | \(+1\) | link | |
| 9.9 | *2400 | \(5\) | 911F | 22min4s | \(+1\) | link | |
| 9.14 | *2400 | \(6\) | 847J | 25min11s | \(+1\) | link | |
| 9.14 | *2400 | \(0\) | 1109D | 9min52s(-1) | \(+1\)，+*100 | link | WA*1 |
| 9.20 | *2500 | \(1\) | 825G | 16min8s(-2) | \(+1\) | link | TLE*2 |
| 9.23 | *2500 | \(2\) | 161E | 31min31s(-1) | \(+1\) | link | TLE*2 |
| 9.26 | *2500 | \(3\) | 543C | 28min41s | \(+1\) | link | |
| 11.7 | *2500 | \(4\) | 1658E | 25min52s(-1) | \(+1\) | link | RE*1 |
| 11.7 | *2500 | \(5\) | 1647E | 31min20s(-2) | \(+1\) | link | WA*2 |
| 11.7 | *2500 | \(4\) | 1625E1 | unac | \(-1\) | link | WA*2 |
| 11.7 | *2500 | \(5\) | 1623E | 31min40s(-1) | \(+1\) | link | TLE*1 |
| 11.7 | *2500 | \(6\) | 1612G | 8min38s | \(+1\) | link | |
| 11.10 | *2500 | \(0\) | 1583F | 23min59s(-1) | \(+1\) +*100 | link | WA*1 |
| 11.10 | *2600 | \(1\) | 1651E | 46min38s(-1) | \(+1\) | link | RE*1 |
| 3.15 | *2600 | \(2\) | 1762F | 48min(-1) | \(+1\) | link | TLE*1 |
| 3.16 | *2600 | \(3\) | 1016F | 26min35s(-2) | \(+1\) | link | WA*2 |
| 3.17 | *2600 | \(4\) | 273E | 34min32s | \(+1\) | link | |
| 3.18 | *2600 | \(5\) | 955F | 28min11s(-4) | \(+1\) | link |
