Submission #1034079

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034079		vjudge1	Diversity (CEOI21_diversity)	C++17	38 / 100	49 ms	1576 KiB

diversity

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

string abc = "abcdefghijklmnopqrstuvwxyz";

#define int long long

int m = 1003;

void solve(){
    int n, q;
    cin >> n >> q;
    // vector<int> v(n);
    vector<int> a(m, 0);
    int r;
    int sz = 0;
    for(int i = 0; i < n; i++){
        cin >> r;
        if(a[r]==0) sz++;
        a[r]++;
    }
    cin >> q >> q;
    vector<int> w, v(sz);
    for(int i = 0; i < m; i++){
        if(a[i] != 0){
            w.push_back(a[i]);
        }
    }
    sort(w.rbegin(), w.rend());
    int st = sz/2;
    v[st]=w[0];
    st--;
    int res = 2;
    for(int i = 1; i < sz; i++){
        v[st]=w[i];
        if(i%2 == 0) st-=res;
        else st+=res;
        res++;
    }

    int ans = 0;
    n = v.size();
    for(int i = 0; i < n; i++){
        ans+=v[i]*(v[i]+1)/2;
    }
    for(int i = 0; i < n; i++){
        for(int j = i+1; j < n; j++){
            ans+=(j-i+1)*v[i]*v[j];
        }
    }

    cout << ans << endl;
    

}


signed main(){
    int t = 1;

    while(t--){
        solve();
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 16 / 16
• Subtask 5: 0 / 26
• Subtask 6: 0 / 36