摘要：
题目链接：http://codeforces.com/problemset/problem/710/E E. Generate a String time limit per test 2 seconds memory limit per test 512 megabytes input stand 阅读全文
摘要：
题目链接：http://codeforces.com/problemset/problem/710/C C. Magic Odd Square time limit per test 1 second memory limit per test 256 megabytes input standar 阅读全文