| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 304 | 304 [R49B]减法 | 225 / 812 | 6 | |
| 305 | 305 [R49C]调整亮度 | 198 / 323 | 2 | |
| 306 | 306 [R49D]苹果和香蕉 | 137 / 277 | 4 | |
| 307 | 307 [R49E]三元逆序对 | 61 / 282 | 7 | |
| 308 | 308 [R49F]集合 | 10 / 136 | 9 | |
| 309 | 309 [R50A]缺失的数 | 341 / 563 | 2 | |
| 310 | 310 [R50B]字符串拼接 | 245 / 583 | 5 | |
| 311 | 311 [R50C]截断加法 | 182 / 691 | 7 | |
| 312 | 312 [R50D]三元组2 | 79 / 542 | 8 | |
| 313 | 313 [R50E]数据同步 | 53 / 245 | 7 | |
| 314 | 314 [R50F]平衡数组 | 8 / 74 | 9 | |
| 315 | 315 [R51A]Forcecodes | 377 / 523 | 1 | |
| 316 | 316 [R51B]Minceraft | 306 / 462 | 1 | |
| 317 | 317 [R51C]电脑蓝屏 | 189 / 640 | 6 | |
| 318 | 318 [R51D]听取蛙声一片3 | 79 / 334 | 7 | |
| 319 | 319 [R51E]棋盘 | 12 / 85 | 8 | |
| 320 | 320 [R51F]听取蛙声一片4 | 5 / 94 | 9 | |
| 321 | 321 [R51G]组合数论 | 4 / 174 | 10 | |
| 322 | 322 [R52A]R | 387 / 583 | 1 | |
| 323 | 323 [R52B]RE | 402 / 602 | 1 | |
| 324 | 324 [R52C]REC | 130 / 962 | 8 | |
| 325 | 325 [R52D]RECA | 109 / 423 | 7 | |
| 326 | 326 [R52E]RECAL | 65 / 203 | 6 | |
| 327 | 327 [R52F]RECALL | 29 / 91 | 6 |
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