UVa 572 - Oil Deposits 【DFS】聯通塊問題

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標籤:printf   scanf   string   \n   size   class   map   body   getchar   

題目連結

 

題目大意:

求圖中@連通塊的個數,只要兩個@相鄰就算它們是連通的(斜方向的也算相鄰)

 

#include <stdio.h>             #include <string.h>char map[110][110];int vis[110][110];int n, m, ans;int dir[8][2] = { {0,1},{1,1},{1,0},{1,-1},{0,-1},{-1,-1},{-1,0},{-1,1} };void dfs(int a,int b){    int i, j;    vis[a][b] = 1;    if (a > m || b > n || a < 1 || b < 1)return;    for (int k = 0; k < 8; k++)    {        int x = a + dir[k][0];        int y = b + dir[k][1];        if (x < 1 || y<1 || x>m || y>n)continue;        if (map[x][y] == ‘@‘&&vis[x][y] == 0)        {            dfs(x, y);        }    }}int main(){    int i, j;    while (scanf("%d%d", &m, &n)!= EOF, n || m)    {        getchar();        for (i = 1; i <= m; i++)        {            scanf("%s", map[i]+1);                   }        memset(vis, 0, sizeof(vis));        ans = 0;        for (i = 1; i <=m; i++)        {            for (j = 1; j <=n; j++)            {                if (map[i][j] == ‘@‘&&vis[i][j] == 0)                {                    ans++;                    dfs(i, j);                }            }        }        printf("%d\n", ans);    }    return 0;}

 

2018-03-31

UVa 572 - Oil Deposits 【DFS】聯通塊問題

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