void flip(int[] arr, int n) {
    var top = 0;
    var bottom = n - 1;

    while (top < bottom) {
        var top_val = arr[top];
        arr[top] = arr[bottom];
        arr[bottom] = top_val;
        top = top + 1;
        bottom = bottom - 1;
    }
    return;
}

int get_max_index(int[] arr, int n) {
    var max_index = 0;
    var max = 0;

    for (var i = 0; i < n; i = i + 1;) {
        if (arr[i] > max) {
            max = arr[i];
            max_index = i;
        }
    }
    return max_index;
}

void pancake_sort(int[] arr, int len) {
    var n = len;

    while (n > 1) {
        var max_index = get_max_index(arr, n);
        flip(arr, max_index + 1);
        flip(arr, n);
        n = n - 1;
    }
    return;
}


int program(int argc, string[] argv) {
    var arr = new int[]{111, 73, 18, 139, 64, 193, 212, 97, 4, 87, 46, 201, 27, 117, 82, 9, 258, 2, 65, 152};

    pancake_sort(arr, 20);

    for (var i = 0; i < 20; i = i + 1;) {
        print_int(arr[i]);
        print_string(" ");
    }
    return 0;
}