各位大佬请问为啥我过不了呢？

#include<bits/stdc++.h>
using namespace std;
int n;
string k;
string n1[10]={"XXX","..X","XXX","XXX","X.X","XXX","XXX","XXX","XXX","xxx"}; 
string n2[10]={"X.X","..X","..X","..X","X.X","X..","X..","..X","X.X","x.x"};
string n3[10]={"X.X","..X","XXX","XXX","XxX","XXX","XXX","..X","XxX","xxx"};
string n4[10]={"X.X","..X","X..","..X","..X","..X","X.X","..X","X.X","..x"};
string n5[10]={"XXX","..X","XXX","XXX","..X","XXX","XXX","..X","XXX","xxx"};
int main()
{
    cin>>n>>k;
    for(int i=0;i<n;i++)
    {
        if(i-n<-1)
        cout<<n1[k[i]-'0']<<".";
        else
        cout<<n1[k[i]-'0'];
    }
    cout<<endl;
    for(int i=0;i<n;i++)
    {
        if(i-n<-1)
        cout<<n2[k[i]-'0']<<".";
        else
        cout<<n2[k[i]-'0'];
    }
    cout<<endl;
    for(int i=0;i<n;i++)
    {
        if(i-n<-1)
        cout<<n3[k[i]-'0']<<".";
        else
        cout<<n3[k[i]-'0'];
    }
    cout<<endl;
    for(int i=0;i<n;i++)
    {
        if(i-n<-1)
        cout<<n4[k[i]-'0']<<".";
        else
        cout<<n4[k[i]-'0'];
    }
    cout<<endl;
    for(int i=0;i<n;i++)
    {
        if(i-n<-1)
        cout<<n5[k[i]-'0']<<".";
        else
        cout<<n5[k[i]-'0'];
    }
    return 0;
}