摘要： 时间限制: 6 Sec 内存限制: 128 MB 题目描述 In GGO, a world dominated by gun and steel, players are fighting for the honor of being the strongest gunmen. Player Shi 阅读全文

摘要： 题目描述 Orz has two strings of the same length: A and B. Now she wants to transform A into an anagram of B (which means, a rearrangement of B) by changin 阅读全文

摘要： 时间限制: 10 Sec 内存限制: 128 MB 题目描述 Given l1,r1,l2,r2,l3,r3,l4,r4, please count the number of four-tuples (x1,x2,x3,x4) such that li≤ xi≤ ri and x1≠x2,x2≠x 阅读全文