#include <bits/stdc++.h> using namespace std; #define ll long long void rotate(std::vector<int> t, int x); void energy(int n, std::vector<int> v) { vector<pair<ll,ll>>vec; for(int i=0;i<v.size();i++){ vec.push_back({v[i],i}); } sort(vec.begin(),vec.end()); for (int i=0;i<n;i+=2) { if (i+1==n) continue; vector<int> a; a.push_back(vec[i+1].second); rotate(a,(vec[i].first+25000-vec[i+1].first+50000)%50000); } }