bool **used = (bool**)malloc(sizeof(bool)*n);

void initUsedArr(bool ***used, int n) {
    for (int i = 0; i < n; i++) {
        *(*used + i) = (bool*)malloc(sizeof(bool)*4);
        for (int j = 0; j < 4; j++) {
            *(*(*used + i)+j) = 0;
            printf("%s %d %d\n ", *(*(*used + i) + j) ? "true" : "false",i,j);
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < 4; j++) {
            printf("%d %d %d\n", *(*(*used + i) + j), i, j);
        }
    }
}