Snake mall

// ~/.vim/cpp_template.cpp
#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>

#define REP(i,a,b) for (int i = a; i < b; i++)


using namespace std;



/*
vector<int> adj[N];                                                          
vector<bool> visited(N, false);
int u, v;
for(int i = 0; i < M;i++){
    cin >> u >> v;
    u--;
    v--;
    adj[u].push_back(v);
    adj[v].push_back(u);
}
*/

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    // Your code starts here
    int n;
    cin >> n;

    vector<pair<int, int>> s(n);
    vector<int> pos(n);
    REP(i,0,n){
        int temp;
        cin >> temp;
        s[i] = make_pair(temp, i);
    }
    sort(s.begin(), s.end());

    long long left = 0, right = 0;
    REP(i,0,n){
        if(left >= right){
            pos[i] = right;
            right += s[i].first;
        }else{
            pos[i] = -left - s[i].first;
            left += s[i].first;
        }
    }

    long double avg = 0.0;
    REP(i,0,n){
        if(pos[i] >=0){
            avg += pos[i];
        }else{
            avg += -pos[i] - s[i].first;
        }
    }
    avg /= n;
    cout.precision(50);
    cout << fixed << avg << endl;

    vector<int> pos_ordered(n);
    REP(i, 0, n){
        pos_ordered[s[i].second] = pos[i];
    }
    REP(i, 0, n){
        cout << pos_ordered[i] << ' ';
    }
    cout << endl;

    
    
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

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Test 48

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Verdict: ACCEPTED

Test 69

Verdict: ACCEPTED

Test 70

Verdict: ACCEPTED

Test 71

Verdict: ACCEPTED

Test 72

Verdict: ACCEPTED