HDU_1241，e31241v3

HDU_1241，e31241v3

#include<cstdio>#include<cstring>using namespace std;const int maxn = 100 + 5;char pic[maxn][maxn];int m, n, idx[maxn][maxn];void dfs(int r, int c, int id) {    if(r < 0 || r >= m || c < 0 || c >= n) return;    if(idx[r][c] > 0 || pic[r][c] != '@') return;    idx[r][c] = id;    for(int dr = -1; dr <= 1; dr++)        for(int dc = -1; dc <= 1; dc++)            if(dr != 0 || dc != 0) dfs(r+dr, c+dc, id);}int main() {    while(scanf("%d%d", &m, &n) == 2 && m && n) {        for(int i = 0; i < m; i++) scanf("%s", pic[i]);        memset(idx, 0, sizeof(idx));        int cnt = 0;        for(int i = 0; i < m; i++)            for(int j = 0; j < n; j++)                if(idx[i][j] == 0 && pic[i][j] == '@') dfs(i, j, ++cnt);        printf("%d\n", cnt);    }    return 0;}