Codeforces Round #449 (Div. 1) D. Nephren Runs a Cinema 卡特兰数，逆元，欧拉函数， - 代码天地

Codeforces Round #449 (Div. 1) D. Nephren Runs a Cinema 卡特兰数，逆元，欧拉函数，

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Codeforces Round #449 (Div. 1) D. Nephren Runs a Cinema 卡特兰数，逆元，欧拉函数，

CF896D Nephren Runs a Cinema(卡特兰数&不互素数求逆元)

Codeforces Round #449 Div. 1

Codeforces Round #449 (Div. 2) C. Nephren gives a riddle 递归

Codeforces Round #449 (Div. 2) C. Nephren gives a riddle

【题解】CF#896 D-Nephren Runs a Cinema

Codeforces Round #449 (Div. 2) D. Ithea Plays With Chtholly

Codeforces Round #485 (Div. 1) D. Perfect Encoding

[Codeforces Round #221 (Div. 1)][D. Tree and Queries]

Codeforces Round #257 (Div. 1) D. Jzzhu and Numbers

Codeforces Round #449 (Div. 2)

CF896D Nephren Runs a Cinema（组合计数+数论）

Educational Codeforces Round 47 (Rated for Div. 2) D.（暴力+gcd）or(欧拉函数) E. (概率+逆元)

Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) D. Lost Tree

Codeforces Round #502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2)D. The Wu

Codeforces Round #502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) D. The Wu（思维）

Codeforces Round #586 (Div. 1 + Div. 2) D. Alex and Julian

Codeforces Round #621 (Div. 1 + Div. 2) D. Cow and Fields

Codeforces Round #621 (Div. 1 + Div. 2).D. Cow and Fields

Codeforces Round #621 (Div. 1 + Div. 2) D. Cow and Fields 详解

Codeforces Round #583 (Div. 1 + Div. 2,) D. Treasure Island（dfs+思维）

【Codeforces Round#621 (Div. 1 + Div. 2)】D. Cow and Fields 题解

Codeforces Round #621 (Div. 1 + Div. 2)D. Cow and Fields

D. Same GCDs, Educational Codeforces Round 81 (Rated for Div. 2),欧拉函数

Codeforces Round #449 (Div. 1) C. Willem, Chtholly and Seniorious

Codeforces Round #449 (Div. 1) B. Ithea Plays With Chtholly

Codeforces Round #449 (Div. 1) E. Welcome home, Chtholly

Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1)D. Frequency of String

Codeforces Round #625 (Div. 1, based on Technocup 2020 Final Round) D. Reachable Strings

Codeforces Round #621 (Div. 1 + Div. 2) D

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