摘要：
You've got string s, consisting of small English letters. Some of the English letters are good, the rest are bad. A substring s[l...r] (1 ≤ l ≤ r ≤ |s 阅读全文
摘要：
C. Watto and Mechanism time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Watto, the owner 阅读全文
摘要：
C. A Mist of Florescence time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output C. A Mist of Flo 阅读全文