#define INTINF 999999
int N;
int **a = NULL;
int i,j;

a = (int **)malloc(N*sizeof(int *));
for(i=0 ; i<N ; i++){
	a[i] = (int *)malloc(N*sizeof(int));
	for(j=0 ; j<N ; j++) a[i][j] = INTINF;
}