题意:给出一个m*n的矩阵,判断连通块的数量
链接:http://acm.hdu.edu.cn/showproblem.php?pid=1241
思路:dfs模板题
注意点:无
以下为AC代码:
Run ID | Submit Time | Judge Status | Pro.ID | Exe.Time | Exe.Memory | Code Len. | Language | Author |
13001097 | 2015-02-28 17:14:13 | Accepted | 1241 | 15MS | 1732K | 1584 B | G++ | luminous |
#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <vector>
#include <deque>
#include <list>
#include <cctype>
#include <algorithm>
#include <climits>
#include <queue>
#include <stack>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#define ll long long
#define ull unsigned long long
#define all(x) (x).begin(), (x).end()
#define clr(a, v) memset( a , v , sizeof(a) )
#define pb push_back
#define mp make_pair
#define read(f) freopen(f, "r", stdin)
#define write(f) freopen(f, "w", stdout)
using namespace std;
const double pi = acos(-1);
int m, n;
int dir[8][2] = { 0,1,0,-1,1,0,-1,0,1,1,1,-1,-1,1,-1,-1 };
string s[105];
void dfs ( int x, int y ){
if ( s[x][y] != '@' )return;
s[x][y] = '*';
for ( int i = 0; i < 8; i ++ ){
if ( x + dir[i][0] >= 0 && x + dir[i][0] < m &&
y + dir[i][1] >= 0 && y + dir[i][1] < n ){
dfs ( x + dir[i][0], y + dir[i][1] );
}
}
}
int main()
{
ios::sync_with_stdio( false );
while ( cin >> m >> n && ( m || n ) ){
for ( int i = 0; i < m; i ++ ){
s[i] = "";
cin.ignore();
cin >> s[i];
}
int cnt = 0;
for ( int i = 0; i < m; i ++ ){
for ( int j = 0; j < n; j ++ ){
if ( s[i][j] == '@' ){
dfs ( i, j );
cnt ++;
}
}
}
cout << cnt << endl;
}
return 0;
}