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Cod sursa(job #867833)
#include<fstream>
using namespace std;
ifstream f("oras.in");
ofstream g("oras.out");
int i,j,n,n1,ok,sol,a[202][202];
int main()
{
f>>n;
n1=n;
while(!ok)
{
if(n==4)
{
ok=1;
break;
}
else
if(n==3)
{
a[1][2]=a[2][3]=a[3][1]=1;
ok=1;
}
else
if(n==6)
{
a[1][2]=a[1][3]=a[1][4]=a[2][3]=a[2][4]=a[2][5]=a[3][4]=a[3][6]=a[4][5]=a[4][6]=a[5][1]=a[5][3]=a[5][6]=a[6][1]=a[6][2]=1;
ok=1;
}
else
{
for(i=1;i<=n-2;++i)
a[i][n-1]=a[n][i]=1;
a[n-1][n]=1;
n-=2;
}
}
if(n1==4)
{
g<<-1<<'\n';
return 0;
}
for(i=1;i<=n1;++i,g<<'\n')
for(j=1;j<=n1;++j)
g<<a[i][j];
return 0;
}