Submission #1694890

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define fi first
#define se second
#define dbg(x) cout<<#x" = "<<((x))<<endl
template<class T,class U> ostream& operator<<(ostream& o, const pair<T,U> &p){o<<"("<<p.fi<<","<<p.se<<")";return o;}
template<class T> ostream& operator<<(ostream& o, const vector<T> &v){o<<"[";for(T t:v){o<<t<<",";}o<<"]";return o;}

int main()
{
    int n;
    cin >>n;
    vector<int> a(n);
    rep(i,n) cin >>a[i];
    sort(all(a));

    int MIN = 191919, MAX = 0;
    rep(i,n/2)
    {
        int s = a[i]+a[n-1-i];
        MIN = min(MIN,s);
        MAX = max(MAX,s);
    }

    printf("%d\n", MAX-MIN);
    return 0;
}

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