// Last edited on 2009-05-14 22:39:20 by stolfi
#include <stdlib.h>
#include <stdio.h>

#define N 32

void init_matrix(int n,int** P){
  int i,j;
  for(i = 0; i < n; i++){
    for(j = 0; j < n; j++){
      P[i][j] = 0;
    }
  }
}

void init_vector(int n,int* v){
  int i,j;
  for(i = 0; i < n; i++){
    for(j = 0; j < n; j++){
      v[i*n+j] = 0;
    }
  }
}

void init_matrox(int n, int P[n][n]){
  int i,j;
  for(i = 0; i < n; i++){
    for(j = 0; j < n; j++){
      P[i][j] = 0;
    }
  }
}

#define OPTION 0

int main (void) {
 int n;
#if (OPTION == 0)
 // Constant bounds
 int vet[N][N];
 n = N;
#endif
#if (OPTION == 1)
 // Variable bounds, algol-style alloc:
 sscanf("32\n", "%d", &n);
 int vet[n][n];
#endif
#if (OPTION == 2)
 // Variable bounds, C-style alloc:
 sscanf("32\n", "%d", &n);
 int **vet;
 vet = malloc(n*sizeof(int*));
 int i;
 for (i = 0; i < n; i++) { vet[i] = malloc(n*sizeof(int)); }
#endif
 init_matrix(n,vet);
 init_vector(n,vet);
 init_matrox(n,vet);
 return 0;
}