摘要：
https://pintia.cn/problem-sets/994805046380707840/problems/994805110318678016 题的目标很简单，就是求两个正整数A和B的和，其中A和B都在区间[1,1000]。稍微有点麻烦的是，输入并不保证是两个正整数。 输入格式： 输入在 阅读全文
摘要：
https://pintia.cn/problem-sets/994805342720868352/problems/994805433955368960 Zhejiang University has 40,000 students and provides 2,500 courses. Now 阅读全文
摘要：
http://codeforces.com/contest/1075/problem/A On a chessboard with a width of nn and a height of nn, rows are numbered from bottom to top from 11 to nn 阅读全文