题意:给定一个n*m的矩阵,*表示陆地, . 表示水,一些连通的水且不在边界表示湖,让你填最少的陆地使得图中湖剩下恰好为k. 析:很简单的一个搜索题,搜两次,第一次把每个湖的位置和连通块的数量记下来,第二次去填陆地,选少的进行填. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdli…

解题思路: 1.dfs所有的水,顺便计数大小并判断是不是湖. 2.如果是湖,将大小和坐标存下来. 3.对湖按大小从小到大排序. 4.dfs前(湖的数量-k)个湖,用*填充这些湖. 代码: #include <bits/stdc++.h> using namespace std; typedef long long ll; struct lake{ int x;int y; int size; bool islake; }; vector <lake> l; ][]; ][]; in…

Description The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrounded by the ocean. Lakes are the maximal regions of water cells, connected by sides, which are…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrou…

D. Lakes in Berland 题目连接: http://codeforces.com/contest/723/problem/D Description The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrounded by the ocean. Lakes…

D. Lakes in Berland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or…

D. Lakes in Berland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or…

D. Lakes in Berland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or…

The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrounded by the ocean. Lakes are the maximal regions of water cells, connected by sides, which are not connect…

D. Lakes in Berland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or…