zoj 2670 Nonoptimal Assignments

#include<cstdio>int main(){ int n; while(scanf("%d", &n) == 1) { if(n > 100) { printf("Impossiblen"); continue; } for(int i=0; i<n; i++) { for(int j=0; j<n; j++) { if(i == j) { if(i == n-1) { printf("100"); } else { printf("0"); } } else printf("1"); if(j == n-1) printf("n"); else printf(" "); } } } return 0;}