Submission #785638

#	Time	Username	Problem	Language	Result	Execution time	Memory
785638		gagik_2007	Diversity (CEOI21_diversity)	C++17	0 / 100	1 ms	212 KiB

diversity

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

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define ff first
#define ss second

ll ttt;
const ll INF=1e18;
const ll MOD=1e9+7;
const ll N=300007;
ll n,m,k;
ll a[N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    // freopen("output.txt","w",stdout);
    // freopen("input.txt","r",stdin);
    cin>>n>>m;
    for(int i=0;i<n;i++){
        int x;
        cin>>x;
        a[x]++;
    }
    cin>>m>>m;
    vector<ll>d;
    for(int i=0;i<N;i++){
        if(a[i])d.push_back(a[i]);
    }
    sort(d.begin(),d.end());
    ll ans=0;
    for(int i=0;i<d.size();i++){
        ans+=(d[i]*(d[i]+1))/2;
        for(int j=1;i+j<d.size();j++){
            ans+=d[i]*d[i+j]*(j+1);
        }
    }
    cout<<ans<<endl;
}

Compilation message (stderr)

diversity.cpp: In function 'int main()':
diversity.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i=0;i<d.size();i++){
      |                 ~^~~~~~~~~
diversity.cpp:40:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int j=1;i+j<d.size();j++){
      |                     ~~~^~~~~~~~~

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