84分?

P1162 填涂颜色

yszkddzyh @ 2022-11-20 18:09:45

第五个点过不去

#include <iostream>
using namespace std;
int n,a[35][35],dx[4]={1,-1,0,0},dy[4]={0,0,1,-1};
void dfs(int x,int y){
    if(x<0||x>n+1||y<0||y>n+1||a[x][y]!=0) return;
    a[x][y]=2;
    for(int i=0;i<n;i++)dfs(x+dx[i],y+dy[i]);
}
int main(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)scanf("%d",&a[i][j]);
    dfs(0,0);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++) printf("%d ",2-a[i][j]);
        putchar('\n');
    }
    return 0;
}

麻烦大佬看看


by 幽竹烟雨 @ 2022-11-20 18:24:05

for(int i=0;i<n;i++)dfs(x+dx[i],y+dy[i]);

i<n ?


by ImposterAnYu @ 2022-11-20 18:24:15

@yszkddzyh

    for(int i=0;i<n;i++)dfs(x+dx[i],y+dy[i]);

by yszkddzyh @ 2022-11-20 18:26:57

应该是i<=n吗?


by Foggy_night @ 2022-11-20 18:27:22

好奇怪的样子


by yszkddzyh @ 2022-11-20 18:28:00

哦!!谢谢大佬指点!


by Foggy_night @ 2022-11-20 18:28:20

不是应该是i=0;i<4;i++


by yszkddzyh @ 2022-11-20 18:28:28

本人已悟


by kkksc004 @ 2022-12-04 15:56:46


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