Submission #74772194

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define int long long
const int inf = 1e18;

void solve(){

    int n; cin >> n;

    vector<int> a(n);
    for(auto &i: a) cin >> i;

    sort(a.begin(), a.end());

    int ans = 0;

    int psum = a[0];

    for(int i = 1; i < n; i++){
        ans += (a[i] * i - psum);
        psum += a[i];
    }
    cout << endl;
    cout << ans << endl;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int tc = 1;
    // cin >> tc;
    while (tc--) solve();
}

Submission Info

Judge Result