hack测试点WA了，求调QAQ

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include<iostream>
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
int main()
{
    int m, n,ans=0;
    cin >> m >> n;
    priority_queue<int>uni;
    priority_queue<int>stu;
    int minx = 2147483647;
    int aa, bb;
    for (int i = 1; i <= m; i++)
    {
        cin >> aa;
        uni.push(aa);
    }
    for (int i = 1; i <= n; i++)
    {
        cin >> bb;
        stu.push(bb);
    }
    while (!stu.empty())
    {

        minx = min(minx, abs(uni.top() - stu.top()));
        int cc = uni.top();
        if (uni.size() > 1) 
        {
            uni.pop();
            if (abs(uni.top() - stu.top()) > minx)
            {
                stu.pop();
                ans += minx;
                minx = 2147483647;
                uni.push(cc);
            }
        }
        else 
        {

            ans += abs(uni.top() - stu.top());
            stu.pop();
        }
    }
    cout << ans << endl;
    return 0;
}