void *alloc(int count, int size) {}

void main(void) {
    int *x, *y, *z;
    int i, j;
    int a, b, c, d;

    a = 1;
    b = 1;
    c = 1;
    d = 0;

    x = alloc(8000, 4);

    for (i = 0; i < 4000; i += 1) {
        for (j = 0; j < 4000; j += 1) {
            x[a*i + j] = x[b*i + c*j] + x[i + d + j];
        }
    }
}