Cod sursă (job #439711)

#include <bits/stdc++.h>
using namespace std;
int v[100001];
int main()
{
    ifstream f("lanterna.in");
    ofstream g("lanterna.out");
    unsigned long long n,i,s1=0,s2=0,total=0;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>v[i];
    }
    sort(v+1,v+n+1);
    while (n>3)
    {
        s1=2*v[1]+v[n-1]+v[n];
        s2=v[1]+2*v[2]+v[n];
        if(s1<s2) total=total+s1;
        else      total=total+s2;
        n=n-2;
    }
    if(n==2) total+=v[2];
    else
        total+=v[1]+v[2]+v[3];
    g<<total;}