This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
//#define endl "\n"
#define int long long int
#define pb push_back
signed main(){
lalala;
int n,m;cin>>n>>m;
int sa[n],sol[m];
for(int i=0;i<n;i++)cin>>sa[i];
for(int i=0;i<m;i++)cin>>sol[i];
sort(sa,sa+n);
sort(sol,sol+m);
if(n==m){
int mx=0;
for(int i=0;i<n;i++)mx=max(mx,abs(sa[i]-sol[i]));
cout<<mx<<endl;
return 0;
}
if(n<m){
int mn=1000'000'000'000;
for(int i=0;i<m-n+1;i++){
int mx=0;
for(int j=i;j<i+n;j++){
mx=max(mx,abs(sa[j-i]-sol[j]));
}
if(mx>mn)break;
mn=mx;
}
cout<<mn<<endl;
}
else{
int mn=1000'000'000'000;
for(int i=0;i<n-m+1;i++){
int mx=0;
for(int j=i;j<i+m;j++){
mx=max(mx,abs(sa[j]-sol[j-i]));
}
if(mx>mn)break;
mn=mx;
}
cout<<mn<<endl;
return 0;
}
}
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