Is 1000000 of int is too much? I think it is about of
4 megabytes of RAM. If c=1000 its crashes. Why? Code is here:
#include <iostream.h>
#include <iostream>
    const long c=1001;
int main()
{
//    freopen("input.txt","rw",stdin);
    char ch;
    long i,j,n,fl,fl1,fl2,a[c][c],p1[c],q1[c],p2[c],q2[c];
    i=j=n=fl=fl1=fl2=0;
    cin>>n;
    for (i=1;i<n+1;i++) for (j=1;j<n+1;j++) {cin.get(ch); if ((ch=='0')||(ch=='1')){a[i][j]=ch-'0';} else j--;}
    for (i=1;i<n+1;i++)
    {
        fl=0;
        for (j=1;j<n+1;j++) if (a[i][j]==0) fl=1;
        if (fl==1) q1[i]=0; else q1[i]=1;
        fl=0;
        for (j=1;j<n+1;j++) if (a[j][i]==0) fl=1;
        if (fl==1) q2[i]=0; else q2[i]=1;
    }
    for (i=1;i<n+1;i++){p1[i]=a[i][1];}
    for (i=1;i<n+1;i++){p2[i]=a[1][i];}
    fl1=1;fl2=1;
    for (i=1;i<n+1;i++) if ((q1[i]==0)&(p1[i]==1)) fl1=0;
    for (i=1;i<n+1;i++) if ((q2[i]==0)&(p2[i]==1)) fl2=0;
    fl=fl1||fl2;
    if (fl==0) cout<<"No"; else cout<<"Yes";
    return 0;
}please help me

I found better idea. And if You want to fix bug like in my program link more stack in your memory.