Multiplicação de Matrizes Dynamic Programming

#include<stdio.h>

int b[1000];
int mat[1000][1000];
int contador = 0;

int m(int i, int j);
void inicializar_matriz();
void imprimir(int n);

int main()
{
    int n;

    inicializar_matriz();
    printf("Informe a quantidade de matrizes: ");
    scanf("%d", &n);

    printf("Informe as dimensoes das matrizes: ");
    for(int i = 0; i <= n; i++)
    {
        scanf("%d", &b[i]);
    }


    printf("Menor numero de op: %d\n", m(1, n) );
    printf("Contador %d\n", contador);



    imprimir(n);
}

void inicializar_matriz()
{
    for(int i = 1; i < 1000; i++)
    {
        for(int j = 1; j < 1000; j++)
        {
            mat[i][j] = 0;
        }
    }
}

int m(int i, int j)
{
    contador = contador + 1;
    if(i <= j)
    {
        if(i == j)
        {
            return(0);
        }

        int aux;

        if(mat[i][i] == 0)
        {
            mat[i][i] = m(i, i);
        }

        //printf("mat[i][i] %d %d : %d\n", i, i, mat[i][i]);


        if(mat[i+1][j] == 0)
        {
            mat[i+1][j] == m(i+1, j);
        }

        //printf("mat[i+1][j] %d %d : %d\n", i + 1, j, mat[i + 1][j]);

        mat[i][j] = mat[i][i] + mat[i+1][j] + b[i-1] * b[i] * b[j];

        //printf("mat[i][j] %d %d : %d\n",i, j , mat[i][j]);

        for(int k = i + 1; k < j; k++)
        {
            if(mat[i][k] == 0)
            {
                mat[i][k] = m(i, k);
            }
            //printf("mat[i][k] %d %d : %d\n", i, k , mat[i][k]);

            if(mat[k+1][j] == 0)
            {
                mat[k+1][j] = m(k+1, j);
            }

            //printf("mat[k+1][j] %d %d : %d\n", k+1, j, mat[k+1][j]);

            aux = mat[i][k] + mat[k+1][j]  + b[i - 1] * b[k] * b[j] ;

            if( aux < mat[i][j])
            {
                mat[i][j] = aux;
            }

            //printf("mat[i][j] %d %d : %d\n", i, j , mat[i][j]);
        }

        return(mat[i][j]);
    }

    return(0);
}

void imprimir(int n)
{

    for(int i = 1; i <=n; i++)
    {
        for(int j = 1; j <=n; j++)
        {
            printf("%d ", mat[i][j]);
        }printf("\n");
    }printf("\n");
}