A:Frog Jumping 代码: #include<bits/stdc++.h> using namespace std; #define Fopen freopen("_in.txt","r",stdin); freopen("_out.txt","w",stdout); #define LL long long #define ULL unsigned LL #define fi first #define…

◇赛时·V◇ Codeforces Round #486 Div3 又是一场历史悠久的比赛,老师拉着我回来考古了……为了不抢了后面一些同学的排名,我没有做A题 ◆ 题目&解析 [B题]Substrings Sort +传送门+   [暴力模拟] 题意 给出n个字符串,你需要将它们排序,使得对于每一个字符串,它前面的字符串都是它的子串(对于字符串i,则字符串 1~i-1 都是它的子串). 解析 由于n最大才100,所以 O(n3) 的算法都不会爆,很容易想到暴力模拟. 如果字符串i是字符串j的子串…

Codeforces Round #521 (Div. 3)  E. Thematic Contests 题目传送门 题意: 现在有n个题目,每种题目有自己的类型要举办一次考试,考试的原则是每天只有一种题目类型一种题目类型只能出现在一天每天的题目类型不能相同,而且后一天的题目数量必须正好为前一天的两倍,第一天的题目数量是任意的求怎么安排能使题目尽量多.注意:不是天数尽量多 思路: 首先我们知道一件事,题目属于哪种类型并不重要,重要的是每种类型的个数所以我们先统计出所有类型的个数,存进一个数组,而…

http://codeforces.com/contest/1092/problem/B There are nn students in a university. The number of students is even. The ii-th student has programming skill equal to aiai. The coach wants to form n2n2 teams. Each team should consist of exactly two stu…

http://codeforces.com/contest/1092/problem/D2 Vova's family is building the Great Vova Wall (named by Vova himself). Vova's parents, grandparents, grand-grandparents contributed to it. Now it's totally up to Vova to put the finishing touches. The cur…

http://codeforces.com/contest/1092/problem/D1 Vova's family is building the Great Vova Wall (named by Vova himself). Vova's parents, grandparents, grand-grandparents contributed to it. Now it's totally up to Vova to put the finishing touches. The cur…

http://codeforces.com/contest/1092/problem/C Ivan wants to play a game with you. He picked some string ss of length nn consisting only of lowercase Latin letters. You don't know this string. Ivan has informed you about all its improper prefixes and s…

http://codeforces.com/contest/1092/problem/A You are given two integers nn and kk. Your task is to construct such a string ss of length nn that for each ii from 11 to kk there is at least one ii-th letter of the Latin alphabet in this string (the fir…

任意门:http://codeforces.com/contest/1077/problem/D D. Cutting Out time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output You are given an array ss consisting of nn integers. You have to find any ar…

http://codeforces.com/contest/1077/problem/E output standard output Polycarp has prepared nn competitive programming problems. The topic of the ii-th problem is aiai, and some problems' topics may coincide. Polycarp has to host several thematic conte…