Submission #1114509

#	Time	Username	Problem	Language	Result	Execution time	Memory
1114509		vjudge1	Diversity (CEOI21_diversity)	C++17	0 / 100	1 ms	508 KiB

diversity

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
using pii=pair<int,int>;
signed main(){
  int n,q;
  cin>>n>>q;
  int a[n];
  for(int i=0;i<n;i++){
    cin>>a[i];
  }
  map<int,int>mp;
  vector<int>cnt;
  for(int i=0;i<n;i++){
    mp[a[i]]++;
  }
  int ans=0;
  for(auto[f,s]:mp){
    cnt.pb(s);
    ans+=s*(s-1)/2+s;
  }
  sort(cnt.begin(),cnt.end(),greater<int>());
  int inc1=cnt[0],inc2=cnt[0],sum=cnt[0];
  for(int i=1;i<n;i++){
    if(inc2<inc1)swap(inc1,inc2);
    ans+=cnt[i]*(inc1+sum);
    inc1+=sum+cnt[i];
    inc2+=(i+1)*cnt[i];
    sum+=cnt[i];
  }
  cout<<ans<<'\n';
}

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