| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 279 | 279 字符串是否以'ly'结尾 | 0 / 0 | (None) | |
| 280 | 280 字符串首尾N字符拼接 | 0 / 0 | (None) | |
| 281 | 281 字符串截取与条件判断 | 0 / 0 | (None) | |
| 282 | 282 字符串中间子串提取 | 0 / 0 | (None) | |
| 283 | 283 字符串'bad'子串起始位置判断 | 0 / 0 | (None) | |
| 284 | 284 字符串前两字符提取与填充 | 0 / 0 | (None) | |
| 286 | 286 字符串首尾字符组合 | 0 / 0 | (None) | |
| 287 | 287 条件拼接字符串 | 0 / 0 | (None) | |
| 288 | 288 字符串最后两字符交换 | 0 / 0 | (None) | |
| 289 | 289 字符串前缀判断 | 0 / 0 | (None) | |
| 290 | 290 字符串首尾匹配判断 | 0 / 0 | (None) | |
| 291 | 291 字符串按短边截取拼接 | 0 / 0 | (None) | |
| 292 | 292 字符串前缀重复 | 0 / 0 | (None) | |
| 293 | 293 字符串首尾子串匹配 | 0 / 0 | (None) | |
| 294 | 294 条件字符删除与字符串处理 | 0 / 0 | (None) | |
| 295 | 295 字符串前缀匹配(首字符可不同) | 0 / 0 | (None) | |
| 297 | 297 字符串首尾字符处理 | 0 / 0 | (None) | |
| 298 | 298 字符串首两字符条件移除 | 0 / 0 | (None) | |
| 300 | 300 统计子串'hi'出现次数 | 0 / 0 | (None) | |
| 301 | 301 字符串子串计数比较 | 0 / 0 | (None) | |
| 302 | 302 字符串特定模式计数 | 0 / 0 | (None) | |
| 303 | 303 字符串末尾匹配(忽略大小写) | 0 / 0 | (None) | |
| 304 | 304 字符串子串条件检查 | 0 / 0 | (None) | |
| 305 | 305 查找特定模式的3字符子串 | 0 / 0 | (None) | |
| 306 | 306 判断字符串xy平衡性 | 0 / 0 | (None) | |
| 307 | 307 字符串条件前缀处理 | 0 / 0 | (None) | |
| 308 | 308 字符串交错合并 | 0 / 0 | (None) | |
| 309 | 309 字符串截取与重复 | 0 / 0 | (None) | |
| 310 | 310 字符串递减截取拼接 | 0 / 0 | (None) | |
| 311 | 311 字符串重复与连接 | 0 / 0 | (None) | |
| 313 | 313 判断子串“xyz”是否居中 | 0 / 0 | (None) | |
| 314 | 314 提取字符串夹心 | 0 / 0 | (None) | |
| 315 | 315 星号相邻字符判断 | 0 / 0 | (None) | |
| 316 | 316 字符串三字符重排 | 0 / 0 | (None) | |
| 317 | 317 字符串模式匹配与修改 | 0 / 0 | (None) |