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Cod sursa(job #531772)
#include<fstream>
using namespace std;
ifstream f("oras.in");
ofstream g("oras.out");
int N,a[202][202];
int main()
{
f>>N;
if(N==4)
g<<-1;
else{
int bla,i,j;
if(N%2) bla=2;
else bla=3;
for(i=1;i<N;++i)
for(j=i+1;j<=N;++j)
a[i][j]=1;
for(i=1;i<=N;++i)
for(j=i-bla;j>0;j-=2)
a[i][j]=1, a[j][i]=0;
if(!N%2) a[3][N]=1,a[N][3]=0;
for(i=1;i<=N;++i){
for(j=1;j<=N;++j)
g<<a[i][j];
g<<'\n';
}
}
}