数论错题
· GCD与LCM
- [二分] D - Only one of two https://atcoder.jp/contests/abc341/tasks/abc341_d
位运算
- 【进制转换】C - Even Digits https://atcoder.jp/contests/abc336/tasks/abc336_c
· 期望
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【概率DP, 期望，每一步决策最优】E - Toward 0 https://atcoder.jp/contests/abc350/tasks/abc350_e
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【概率DP，扔骰子扔到1怎么处理（同上）】https://ac.nowcoder.com/acm/contest/80743/F
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【概率DP，求在所有点的期望和】 https://atcoder.jp/contests/abc360/tasks/abc360_e
· 数论
· 数学思维题
- Physical Education Lesson https://codeforces.com/contest/1928/problem/C
- 红魔馆的馆主 https://ac.nowcoder.com/acm/contest/77231/C
·组合数
- 【组合数；一个数的因数个数】小红的子序列权值和（easy）https://ac.nowcoder.com/acm/contest/76133/F
- 【容斥原理】 D - Exam in MAC https://codeforces.com/contest/1935/problem/D
- 【一个比较简单的组合数，但是我想了很久才想明白】C. Counting Orders https://codeforces.com/contest/1828/problem/C
