[USACO15OPEN]回文的路径Palindromic Paths 题目描述 Farmer John's farm is in the shape of an N \times NN×N grid of fields (1 \le N \le 5001≤N≤500), each labeled with a letter in the alphabet. For example: ABCD BXZX CDXB WCBA Each day, Bessie the cow walks from…
5020: Palindromic Paths Time Limit(Common/Java):10000MS/30000MS Memory Limit:65536KByteTotal Submit: 8 Accepted:4 Description Given an N×N grid of fields (1≤N≤500), each labeled with a letter in the alphabet. For example: ABCD BXZXCDX…
Description You are given a positive integer n. Let's build a graph on vertices 1, 2, ..., n in such a way that there is an edge between vertices u and v if and only if gcd(u,v)≠1. Let d(u, v) be the shortest distance between u and v, or 0 if there i…
题目链接:http://codeforces.com/problemset/problem/883/H Time limit: 3000 ms Memory limit: 262144 kB Kolya has a string s of length n consisting of lowercase and uppercase Latin letters and digits. He wants to rearrange the symbols in s and cut it into th…
描述 Given an N×N grid of fields (1≤N≤500), each labeled with a letter in the alphabet. For example: ABCD BXZXCDXBWCBA Each day, Susa walks from the upper-left field to the lower-right field, each step taking her either one field to the right or one fi…
E. Paths and Trees time limit per test:3 seconds memory limit per test:256 megabytes input:standard input output:standard output Little girl Susie accidentally found her elder brother's notebook. She has many things to do, more important than solving…
You are given a tree (a connected acyclic undirected graph) of n vertices. Vertices are numbered from 1 to n and each vertex is assigned a character from a to t. A path in the tree is said to be palindromic if at least one permutation of the labels i…
Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…
计蒜客)翻硬币 //暴力匹配 #include<cstdio> #include<cstring> #define CLR(a, b) memset((a), (b), sizeof((a))) using namespace std; int n, m, t; int main() { int i, j, x; scanf("%d", &t); while(t--) { scanf("%d%d", &n, &m)…
[codeforces 293]B. Distinct Paths 试题描述 You have a rectangular n × m-cell board. Some cells are already painted some of k colors. You need to paint each uncolored cell one of the k colors so that any path from the upper left square to the lower right…
Palindromic characteristics of string s with length |s| is a sequence of |s| integers, where k-th number is the total number of non-empty substrings of s which are k-palindromes. A string is 1-palindrome if and only if it reads the same backward as f…
E. Paths and Trees time limit per test: 3 seconds memory limit per test: 256 megabytes input: standard input output: standard output Little girl Susie accidentally found her elder brother's notebook. She has many things to do, more important than sol…
