标签:yy 洛谷 .. int WW 计数 1596 include 105
题目描述
Due to recent rains, water has pooled in various places in Farmer John's field, which is represented by a rectangle of N x M (1 <= N <= 100; 1 <= M <= 100) squares. Each square contains either water ('W') or dry land ('.'). Farmer John would like to figure out how many ponds have formed in his field. A pond is a connected set of squares with water in them, where a square is considered adjacent to all eight of its neighbors. Given a diagram of Farmer John's field, determine how many ponds he has.
由于近期的降雨,雨水汇集在农民约翰的田地不同的地方。我们用一个NxM(1<=N<=100;1<=M<=100)网格图表示。每个网格中有水('W') 或是旱地('.')。一个网格与其周围的八个网格相连,而一组相连的网格视为一个水坑。约翰想弄清楚他的田地已经形成了多少水坑。给出约翰田地的示意图,确定当中有多少水坑。
输入输出格式
输入格式:
Line 1: Two space-separated integers: N and M * Lines 2..N+1: M characters per line representing one row of Farmer John's field. Each character is either 'W' or '.'. The characters do not have spaces between them.
第1行:两个空格隔开的整数:N 和 M 第2行到第N+1行:每行M个字符,每个字符是'W'或'.',它们表示网格图中的一排。字符之间没有空格。
输出格式:
Line 1: The number of ponds in Farmer John's field.
一行:水坑的数量
输入输出样例
输入样例#1: 复制10 12 W........WW. .WWW.....WWW ....WW...WW. .........WW. .........W.. ..W......W.. .W.W.....WW. W.W.W.....W. .W.W......W. ..W.......W.输出样例#1: 复制
3
说明
OUTPUT DETAILS: There are three ponds: one in the upper left, one in the lower left, and one along the right side.
题解:DFS暴搜石锤
#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<algorithm>
typedef long long ll;
using namespace std;
bool f[105][105];
//char s[105][105];
string s[105];
int n,m,ans,xx,yy;
int dx[18]={0,1,-1,0,0,1,1,-1,-1};
int dy[18]={0,0,0,1,-1,1,-1,1,-1};
void dfs(int x,int y){
//if(x>n || x<1 || y>m || y<1) return;
for(int i=1;i<=8;i++){
xx=x+dx[i]; yy=y+dy[i];
//if(f[xx][yy]==1) continue;
if(s[xx][yy]=='W' && f[xx][yy]==0 &&
xx<=n && xx>=1 && yy<=m && yy>=1)
{ f[xx][yy]=1; dfs(xx,yy); }
}
}
int main(){
scanf("%d %d\n",&n,&m);
for(int i=1;i<=n;i++)
//for(int j=1;j<=m;j++)
getline(cin,s[i]);
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(s[i][j]=='W' && f[i][j]==0) {
ans++; f[i][j]=1; dfs(i,j);
}
}
}
cout<<ans;
return 0;
}
标签:yy,洛谷,..,int,WW,计数,1596,include,105 来源: https://www.cnblogs.com/wuhu-JJJ/p/11229275.html
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