#include "stdio.h"
const int m = 10;
unsigned char a[m][m];
int x, n;
int main() {
while (1) {
printf("n=");
scanf("%d", &n);
if (n > m) {
printf("n must not be greater when %d\n", m);
continue;
}
break;
}
for (int k=0; k<n / 2; k++) {
for (int i=k; i<n - k; i++) {
for (int j=k; j<n - k; j++) {
a[i][j] = k + 1;
}
}
}
for (int i=0; i<n; i++) {
for (int j=0; j<n; j++) {
printf("%2d", a[i][j]);
}
printf("\n");
}
return 0;
}