Submission #826978

#	Time	Username	Problem	Language	Result	Execution time	Memory
826978		amin	Diversity (CEOI21_diversity)	C++14	0 / 100	1 ms	212 KiB

diversity

#include <bits/stdc++.h>

using namespace std;

#define ll long long
int fre[300001];
int main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
ll n,q;
cin>>n>>q;
int a[n];
for(int i=0;i<n;i++)
{
    cin>>a[i];
    fre[a[i]]++;
}
vector<pair<int,int> >v;
for(int i=0;i<n;i++)
{
    if(fre[a[i]]==0)
    {
        continue;
    }
    v.push_back({fre[a[i]],a[i]});
    fre[a[i]]=0;
}
sort(v.begin(),v.end());
reverse(v.begin(),v.end());
vector<pair<int,int > >s2;
vector<pair<int,int > >s1;
ll sz1=0,sz2=0;
ll k=v.size();
ll ans=n*(n+1)/2*k;
for(auto i:v)
{
 //   cout<<i.first<<' '<<i.second<<endl;
    if(sz1<=sz2)
    {
        ans-=sz1*(sz1+1)/2;
        ll j=n-sz1-i.first;
        ans-=j*(j+1)/2;
        s1.push_back(i);
        sz1+=i.first;
    }else
    {
        ans+=sz2*(sz2+1)/2;
    ll j=n-sz2-i.first;
    ans-=j*(j+1)/2;
        s2.push_back(i);
        sz2+=i.first;
    }
}
reverse(s2.begin(),s2.end());
vector<int>b;

for(auto i:s1)
{
    while(i.first--)
    {
        b.push_back(i.second);
    }
}
for(auto i:s2)
{
    while(i.first--)
    {
        b.push_back(i.second);
    }
}
while(q--)
{
    int l,r;
    cin>>l>>r;
}
cout<<ans;

}

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