B. Perfect Number time limit per test2 seconds memory limit per test256 megabytes Problem Description We consider a positive integer perfect, if and only if the sum of its digits is exactly 10. Given a positive integer k, your task is to find the k-t…

题目传送门 B. Perfect Number time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output We consider a positive integer perfect, if and only if the sum of its digits is exactly 1010. Given a positive integ…

A. Supermarket We often go to supermarkets to buy some fruits or vegetables, and on the tag there prints the price for a kilo. But in some supermarkets, when asked how much the items are, the clerk will say that a yuan for b kilos (You don't need to…

Supermarket 找最便宜的就行 Solution Perfect Number 暴力做 Solution Seat Arrangement 注意当k=1时,横着和竖着是同一种方案 Solution Substring dp[i][j]表示在节点i结束,字母j最多有多少个,按拓扑排序的顺序计算 Solution Congruence Equation Solution A Game With Numbers 跟SG游戏解决思路差不多 Solution…

[链接] 我是链接,点我呀:) [题意] 在这里输入题意 [题解] 直接暴力求出第k个perfect数字就好. 纯模拟. [代码] #include <bits/stdc++.h> #define double long double using namespace std; int n; int _judge(int x){ int num = 0; while (x){ num+=x%10; x/=10; } return num==10; } int main(){ #ifdef LOC…

B. Strings of Power Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/318/problem/C Description Let us call a pair of integer numbers m-perfect, if at least one number in the pair is greater than or equal to m. Thus, the pair…

引子: A题过于简单导致不敢提交,拖拖拉拉10多分钟还是决定交,太冲动交错了CE一发,我就知道又要错过一次涨分的机会.... B题还是过了,根据题意目测数组大小开1e5,居然蒙对,感觉用vector更好一点... C题WA第9组,GG思密达....明天起床再补C吧 - - 题目链接: http://codeforces.com/contest/835/problem/B B. The number on the board Some natural number was written on t…

链接: https://codeforces.com/contest/1215/problem/B 题意: You are given a sequence a1,a2,-,an consisting of n non-zero integers (i.e. ai≠0). You have to calculate two following values: the number of pairs of indices (l,r) (l≤r) such that al⋅al+1-ar−1⋅ar…

原文链接http://www.cnblogs.com/zhouzhendong/p/8397685.html 2018-02-01 $A$ 题意概括 你要买$m$斤水果,现在有$n$个超市让你选择. 每个超市的水果价格是固定的.第$i$个超市的水果价格用两个整数$a_i和b_i$来表示.含义是$a_i$元可以买$b_i$斤. 问你买$m$斤水果最少花费多少钱. 题解 直接枚举超市,判断最少的花费就可以了. 代码 #include <cstring> #include <cstdio>…

D. Minimum number of steps time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We have a string of letters 'a' and 'b'. We want to perform some operations on it. On each step we choose one of s…