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第一次深搜。。。看了下别人的 总结下 代码+注释。。。继续努力!//POJ1164 //DFS #include <stdio.h> #include <string.h> int visit[100][100]; int s,map[100][100],m,n,number=0,max_size=0; void dfs(int i,int j) { s++;//temp size add visit[i][j]=1;//has been visited if(map[i][j]%2==0)//judge west { if(!visit[i][j-1]) dfs(i,j-1); } map[i][j]>>=1;//the value divide 2,the value of west is 1,when divide 2,it lose and 0,1,2,4 remain. so the west didn't work. if(map[i][j]%2==0)//judge north { if(!visit[i-1][j]) dfs(i-1,j); } map[i][j]>>=1;//the north didn't work,0 0 1 2 remain. if(map[i][j]%2==0)//judge east { if(!visit[i][j+1]) dfs(i,j+1); } map[i][j]>>=1;//the east didn't work if(map[i][j]%2==0)//judge south { if(!visit[i+1][j]) dfs(i+1,j); } } int main() { int i,j; scanf("%d%d",&m,&n); for(i=0;i<m;i++) for(j=0;j<n;j++) scanf("%d",&map[i][j]);//input memset(visit,0,sizeof(visit));//clear the array for(i=0;i<m;i++) for(j=0;j<n;j++) { if(!visit[i][j])//has not been visited { s=0;//temp size number++;// the number of rooms dfs(i,j); if(s>max_size)//find the max_size max_size=s; } } printf("%d\n%d",number,max_size); return 0; } Followed by: Post your reply here: |
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