Cod sursa(job #333197)

Utilizator savimSerban Andrei Stan savim Data 21 iulie 2009 17:49:59
Problema Oras Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.45 kb
#include <stdio.h>

#define MAX_N 256

int n;
int A[MAX_N][MAX_N];

void cit() {
    freopen("oras.in", "r", stdin);
    freopen("oras.out", "w", stdout);
    
    scanf("%d", &n);
}

inline int poz(int x) {
    if (x % n) return x % n;
    else return n;
}

void inductie(int k) {
    if (k > n) return;
    
    A[k - 2][k - 1] = 1; A[k - 1][k] = 1; A[k][1] = 1;
    for (int i = 1; i <= k - 3; i++)
        A[i][k - 1] = 1;
    for (int i = 2; i <= k - 2; i++)
        A[k][i] = 1;
        
    inductie(k + 2);
}

void solve() {
    if (n % 2 == 1) {
        for (int i = 1; i <= n; i++)
            A[i][poz(i + 1)] = 1;
        for (int i = 1; i <= n; i++) {
            int j = poz(i + 3);
            
            while (j != i) {
                if (!A[j][i]) A[i][j] = 1;
                j = poz(j + 2);
            }
        }
        
        return;
    }

    A[1][2] = 1; A[1][3] = 1; A[1][5] = 1;
    A[2][3] = 1; A[2][4] = 1; A[2][6] = 1;
    A[3][4] = 1; A[3][5] = 1; A[3][6] = 1;
    A[4][5] = 1; A[4][1] = 1;
    A[5][2] = 1; A[5][6] = 1;
    A[6][1] = 1; A[6][4] = 1;
    
    inductie(8);
}

void write() {
    if (n == 4) {
        printf("-1\n");
        return;
    }
    
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) 
            printf("%d", A[i][j]);
        printf("\n");
    }
}

int main() {

    cit();
    solve();
    write();

    return 0;
}