摘要:
D. Distinct Characters Queries time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are g 阅读全文
摘要:
题目链接 https://codeforces.com/problemset/problem/1228/B Suppose there is a h×wh×w grid consisting of empty or full cells. Let's make some definitions: r 阅读全文