求助

#include <bits/stdc++.h>
#define INF 0x3f3f3f3f
using namespace std;
int square[34][34],n;
bool Outside(int i,int j){
    if((square[i-1][j]==INF || square[i+1][j]==INF ||
       square[i][j-1]==INF || square[i][j+1]==INF)&&square[i][j]==0){
        return true;
    }
    return false;
}
void PeelOnion(int layer){
       /*Union*/
    for(int i = layer;i <= n+1-layer;++i){
        if(Outside(layer,i))square[layer][i]=INF;
        if(Outside(n+1-layer,i))square[n+1-layer][i]=INF;
        if(Outside(i,layer))square[i][layer]=INF;
        if(Outside(i,n+1-layer))square[i][n+1-layer]=INF;
    }

}
int main(){
    cin >> n;
    memset(square,0x3f,sizeof(square));
    for(int i = 1;i <= n;++i)
        for(int j = 1;j <= n;++j)
            cin >> square[i][j]; 
    for(int i = 1;i <= n/2+1;++i){
        PeelOnion(i);
    }
    for(int i = 1;i <= n;++i){
        for(int j = 1;j <= n;++j){
            if(square[i][j]==INF)cout << "0 ";
            else if(square[i][j]==1)cout << "1 ";
            else if(square[i][j]==0)cout << "2 "; 
        }
        cout << endl;
    }
    return 0;
} 

这段代码会导致#4和#6WA掉，我查看了输入样例，我的程序会导致有的在外面的 0 莫名其妙被算进里面。

我把 28 行的n/2+1改成了n，没用。
我于是把 28\sim30 行的代码重复了一遍，过了。

求大佬告诉我我的原先代码有什么问题