D. The Maths Lecture time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Amr doesn't like Maths as he finds it really boring, so he usually sleeps in Maths lectures. But one day the teacher sus…
传送门 D. The Maths Lecture time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Amr doesn't like Maths as he finds it really boring, so he usually sleeps in Maths lectures. But one day the teacher…
One day, after a difficult lecture a diligent student Sasha saw a graffitied desk in the classroom. She came closer and read: "Find such positive integer n, that among numbers n + 1, n + 2, ..., 2·n there are exactly m numbers which binary representa…
不要62 Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 36862 Accepted Submission(s): 13418 Problem Description 杭州人称那些傻乎乎粘嗒嗒的人为62(音:laoer).杭州交通管理局经常会扩充一些的士车牌照,新近出来一个好消息,以后上牌照,不再含有不吉利的数字了,这样一来,就可…
题目链接 题意:判断小于n的数字中,数位从高到低成上升再下降的趋势的数字的个数 分析:简单的数位DP,保存前一位的数字,注意临界点的处理,都是套路. #include <bits/stdc++.h> typedef long long ll; const int N = 70 + 5; char str[N]; ll dp[N][10][2]; int len; ll DFS(int pos, int pre, int up, int limit) { if (pos == len) { re…