D. Mahmoud and a Dictionary 题目连接: http://codeforces.com/contest/766/problem/D Description Mahmoud wants to write a new dictionary that contains n words and relations between them. There are two types of relations: synonymy (i. e. the two words mean t…

A. Mahmoud and Longest Uncommon Subsequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest comm…

A. Mahmoud and Longest Uncommon Subsequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest comm…

地址:http://codeforces.com/contest/766/problem/D 题目: D. Mahmoud and a Dictionary time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Mahmoud wants to write a new dictionary that contains n words…

Mahmoud wants to write a new dictionary that contains n words and relations between them. There are two types of relations: synonymy (i. e. the two words mean the same) and antonymy (i. e. the two words mean the opposite). From time to time he discov…

E. Mahmoud and a xor trip 题目连接: http://codeforces.com/contest/766/problem/E Description Mahmoud and Ehab live in a country with n cities numbered from 1 to n and connected by n - 1 undirected roads. It's guaranteed that you can reach any city from an…

C. Mahmoud and a Message 题目连接: http://codeforces.com/contest/766/problem/C Description Mahmoud wrote a message s of length n. He wants to send it as a birthday present to his friend Moaz who likes strings. He wrote it on a magical paper but he was su…

B. Mahmoud and a Triangle 题目连接: http://codeforces.com/contest/766/problem/B Description Mahmoud has n line segments, the i-th of them has length ai. Ehab challenged him to use exactly 3 line segments to form a non-degenerate triangle. Mahmoud doesn't…

A. Mahmoud and Longest Uncommon Subsequence 题目连接: http://codeforces.com/contest/766/problem/A Description While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest common subsequence. They solved it, and then Ehab ch…

地址:http://codeforces.com/contest/766/problem/E 题目: E. Mahmoud and a xor trip time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Mahmoud and Ehab live in a country with n cities numbered from …