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Cod sursa(job #569722)
#include <stdio.h>
#define MAXN 300
int a[MAXN][MAXN];
int i,N,poz,j;
int main()
{
freopen("oras.in","r",stdin);
freopen("oras.out","w",stdout);
scanf("%d",&N);
if (N==4) { printf("-1\n"); return 0;}
if (N%2){
poz = 3;
a[1][2] = a[2][3] = a[3][1] = 1;
}
else {
poz = 6;
a[1][6] = a[1][2] = a[1][3] = 1;
a[3][2] = a[3][4] = a[3][5] = 1;
a[5][4] = a[5][6] = a[5][1] = 1;
a[2][5] = a[2][6] = 1;
a[4][1] = a[4][2] = 1;
a[6][3] = a[6][4] = 1;
}
while (poz+2 <= N){
a[poz+1][poz+2] = 1;
for (i=1; i<=poz; ++i){
a[i][poz+1] = 1;
a[poz+2][i] = 1;
}
poz+=2;
}
for (i=1; i<=N; ++i){
for (j=1; j<=N; ++j)
printf("%d",a[i][j]);
printf("\n");
}
return 0;
}