HDU-1241-油藏

这题一道深搜的简单题目，其实题目的思路就只是向八个方向搜索，然后把整个油田遍历一遍即可。

#include <cstdio>
#include <cstring>
int map[105][105];
int vis[105][105];
char l[105];
int n, m, color, ans;
int d[8][2] = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}, {1, 1}, {-1, 1}, {-1, -1}, {1, -1}};

void dfs(int r,int c)
{
    vis[r][c] = color;
    for (int i = 0; i < 8;i++) {
        int row = r + d[i][0];
        int col = c + d[i][1];
        if (row<0||col<0||row>=m||col>=n)
            continue;
        if (map[row][col]&&!vis[row][col])
            dfs(row, col);
    }
}

int main()
{
    while (scanf("%d%d",&m,&n)==2&&m) {
        memset(map, 0, sizeof(map));
        memset(vis, 0, sizeof(vis));
        for (int i = 0; i < m;i++) {
            scanf("%s", &l);
            for (int j = 0; j < n;j++) {
                if (l[j]=='@')
                    map[i][j] = 1;
            }
        }
        color = 0;
        for (int i = 0; i < m;i++) {
            for (int j = 0; j < n;j++) {
                if (!vis[i][j]&&map[i][j]) {
                    color++;
                    dfs(i,j);
                }
            }
        }
        printf("%d\n",color);
    }
    return 0;
}