题目戳这里. 首先题解给的是并查集的做法.这个做法很好想,但是很难码.用线段树数来维护并查集,暴力合并. 这里推荐另一个做法,可以无视\(K\)的限制.我们给每条边加个边权,这个边权为这条边左端点的值.然后我们将询问离线,按\(r\),从小到大处理. 对于当前询问\([l,r]\)我们用lct维护所有右端点\(\le r\)的边构成的最大生成树,然后用树状数组查询生成树中边权\(\ge l\)的边有几条即可. #include<algorithm> #include<iostream&g…

Animals and Puzzle time limit per test 5 seconds memory limit per test 512 megabytes input standard input output standard output Owl Sonya gave a huge lake puzzle of size n × m to hedgehog Filya as a birthday present. Friends immediately started to a…

A. Timofey and a tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Each New Year Timofey and his friends cut down a tree of n vertices and bring it home. After that they paint all the n…

7.11 animals.c 程序 #include <stdio.h> #include <ctype.h> int main(void) { char ch; printf("Give me a letter of the alphabet, and I will give "); printf("an animal name\nbeginning with that letter.\n"); printf("Please ty…

D. Animals and Puzzle 题目连接: http://codeforces.com/contest/713/problem/D Description Owl Sonya gave a huge lake puzzle of size n × m to hedgehog Filya as a birthday present. Friends immediately started to assemble the puzzle, but some parts of it turn…

摘要:For centuries, humans have been fascinated by how migratory animals find their way over thousands of kilometres. Here, I review the mechanisms used in animal orientation and navigation with a particular focus on long-distance migrants and magnetor…

[题目]D. Animals and Puzzle [题意]给定n*m的01矩阵,Q次询问某个子矩阵内的最大正方形全1子矩阵边长.n,m<=1000,Q<=10^6. [算法]动态规划DP+二维ST表 [题解]设f[i][j]为以(i,j)为右下角的最大正方形全1子矩阵. f[i][j]=min{ f[i-1][j-1] , f[i][j-1] , f[i-1][j] }+1 然后用二维ST表处理f[i][j]的子矩阵最小值. 对于每次询问,二分边长x,答案即子矩阵(x1+x-1,y1+x-1…

D - Animals and Puzzle #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PII pair<int, int> #define PLI pair<LL, int> #define ull unsigned long long using namespace std; + ; cons…

G - Animals Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 35D Description input input.txt output output.txt Once upon a time DravDe, an outstanding person famous for his professional ac…

[ZOJ2669]Lattice Animals Time Limit: 5 Seconds      Memory Limit: 32768 KB Lattice animal is a set of connected sites on a lattice. Lattice animals on a square lattice are especially popular subject of study and are also known as polyminoes. Polymino…