| #301 | 「2020 杭电多校 Day5」Boring Game | |
| #302 | 「2020 杭电多校 Day5」Expression | |
| #303 | 「2020 杭电多校 Day5」Array Repairing | |
| #304 | 「2020 杭电多校 Day5」Alice and Bob | |
| #305 | 「2020 杭电多校 Day5」Tree | |
| #306 | 「2020 杭电多校 Day5」Set2 | |
| #307 | 「2020 杭电多校 Day5」Paperfolding | |
| #308 | 「2020 杭电多校 Day5」Function | |
| #309 | 「2020 杭电多校 Day5」Exam | |
| #310 | 「2020 杭电多校 Day5」Set1 | |
| #311 | 「2020 杭电多校 Day5」An Easy Matrix Problem | |
| #312 | 「WC2020」有根数 | |
| #313 | 「WC2020」猜树游戏 | |
| #314 | 「WC2020」选氪（阴间数据） | |
| #315 | apple | |
| #316 | chicken | |
| #317 | game | |
| #322 | bags | |
| #323 | substr | |
| #324 | heroes | |
| #325 | bricks | |
| #326 | 矩形覆盖 | |
| #327 | 图 | |
| #328 | 序列 | |
| #329 | 「2020 杭电多校 Day6」Road To The 3rd Building | |
| #330 | 「2020 杭电多校 Day6」Little Rabbit's Equation | |
| #331 | 「2020 杭电多校 Day6」Borrow | |
| #332 | 「2020 杭电多校 Day6」Asteroid in Love | |
| #333 | 「2020 杭电多校 Day6」Fragrant numbers | |
| #334 | 「2020 杭电多校 Day6」A Very Easy Graph Problem | |
| #335 | 「2020 杭电多校 Day6」A Very Easy Math Problem | |
| #336 | 「2020 杭电多校 Day6」Yukikaze and Smooth numbers | |
| #337 | 「2020 杭电多校 Day6」Divisibility | |
| #338 | 「2020 杭电多校 Day6」Expectation | |
| #339 | 「2020 杭电多校 Day6」Kirakira | |
| #340 | 矩阵 | |
| #341 | 产品排序 | |
| #342 | 波动序列 | |
| #343 | 逆序对 | |
| #344 | 计树 | |
| #345 | 先辈的游戏 | |
| #346 | 情侣 | |
| #347 | count | |
| #348 | good | |
| #349 | running | |
| #350 | CF1119H加强版 | |
| #351 | LGV引理 | |
| #352 | CF720C | |
| #353 | 分组 | |
| #354 | 算术 | |
| #355 | 往返 | |
| #356 | 「2020 杭电多校 Day7」Animism | |
| #357 | 「2020 杭电多校 Day7」Bitwise XOR | |
| #358 | 「2020 杭电多校 Day7」Counting | |
| #359 | 「2020 杭电多校 Day7」Decision | |
| #360 | 「2020 杭电多校 Day7」Expectation | |
| #361 | 「2020 杭电多校 Day7」Flower | |
| #362 | 「2020 杭电多校 Day7」Game | |
| #363 | 「2020 杭电多校 Day7」Heart | |
| #364 | 「2020 杭电多校 Day7」Increasing and Decreasing | |
| #365 | 「2020 杭电多校 Day7」Jogging | |
| #366 | 「2020 杭电多校 Day7」Kcats | |
| #367 | 项链 | |
| #368 | 染色 | |
| #369 | 史莱姆 | |
| #370 | tour | |
| #371 | permutation | |
| #372 | asakura | |
| #373 | baocai | |
| #374 | pyjy | |
| #375 | cjsy | |
| #376 | 矩阵 | |
| #377 | 漂亮的字符串 | |
| #378 | 随机序列 | |
| #379 | Sasha and swag strings（压缩后缀自动机） | |
| #380 | 最小树形图 | |
| #381 | Im | |
| #382 | DDL | |
| #383 | Warrior | |
| #384 | 俄罗斯方块 | |
| #385 | 三格缩进 | |
| #386 | 最佳观影 | |
| #390 | 「IOI2020」plants | |
| #391 | 「IOI2020」supertrees | |
| #392 | 「IOI2020」tickets | |
| #393 | 「IOI2020」biscuits | |
| #396 | 月饼 | |
| #397 | 伟大的卫国战争 | |
| #398 | 道路扩建 | |
| #399 | 樱初音的考试 | |
| #400 | 勇士 | |
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