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<iostream>
#include<vector>
#include<algorithm>
using namespace::std;
int main(){
int n,m;
cin>>n>>m;
vector<int> f;
vector<int> s;
if(n>m){
for(int i=0,t;i<n;i++)
cin>>t,s.push_back(t);
for(int i=0,t;i<m;i++)
cin>>t,f.push_back(t);
swap(n,m);
}else{
for(int i=0,t;i<n;i++)
cin>>t,f.push_back(t);
for(int i=0,t;i<m;i++)
cin>>t,s.push_back(t);
}
sort(f.begin(),f.end(),greater_equal<int>());
sort(s.begin(),s.end(),greater_equal<int>());
int pos=0;
for(int i=1;i<m-n+1;i++){
if(abs(f[0]-s[i])<=abs(f[0]-s[pos])) pos=i;
}
int maxn=0;
for(int i=pos,t=pos;i<pos+n;i++)
maxn=max(abs(f[i-t]-s[i]),maxn);//,cout<<abs(f[i-t]-s[i])<<' '<<i-t<<' '<<i<<'\n';
cout<<maxn<<'\n';
}
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