openjudge大一测试题 错在哪

Question

#include<iostream>
using namespace std;
int main()
{
    int n;
    char c1,c2;
    cin>>n>>c1>>c2;
    for(int x=1;x<=n;x++)
{   for(int y=1;y<=n;y++)
{   if(x==1||y==1||x==n||y==n||x==y||x+y==11)
    cout<<c1;
    else
    cout<<c2;}
    cout<<endl;
}
    cout<<endl;
    return 0;
}

Answer 1

x+y==11
改为
x+y==n+1