本文记录了2020CCPC初赛的解题过程及技巧分享，涉及多道题目解析，包括multi-nim模型、因数分解、分治FFT等算法的应用。
| A | B | C | D | E | F | G | H | I | J | K | L | M | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 CCPC Preliminary 2020/9/20 | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ✔ |
Replay:
B
solved by sanshuiii. 1:15 (1 try)
人均Min25
C
solved by sanshuiii. 0:18 (1 try)
签到，简单讨论即可
E
solved by sanshuiii. 2:40 (9 try)
multi-nim模型，因数分解后变成NIM和，用pollard-rho做因式分解
idyllic对因式分解有着独到的理解
G
solved by idyllic. 0:23 (1 try)
J
solved by DexHxr. 0:08 (1 try)
K
solved by sanshuii & DexHxr. 0:38 (2 tries)
PE一发，0202年了居然还有oj不能忽略行末空格
M
upsolved by idyllic
分治FFT
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