求助，50pts

#include <bits/stdc++.h>
using namespace std;
long long school,student,k,cnt,ans,a[1000010],b[1000010];

int main()
{
    cin>>school>>student;
    for(int i = 0 ; i < school ; i ++)
    {
        cin>>a[i];//学校 
    }
    for(int i = 0 ; i < student ; i ++)
    {
        cin>>b[i];//学生 
    }
    for(int i = 0 ; i < student ; i++)
    {
        cnt = INT_MAX;
        for(int j = 0 ; j < school ; j++)
        {
            if(abs(b[i] - a[j]) < cnt)
            {
                cnt = abs(b[i] - a[j]);
            }
        }
        ans += cnt;
    }
    cout<<ans;
    return 0;
}

懵了，五个TLE