Submission #890528

#	Time	Username	Problem	Language	Result	Execution time	Memory
890528		irmuun	Let's Win the Election (JOI22_ho_t3)	C++17	28 / 100	293 ms	600 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,k;
    cin>>n>>k;
    ll a[n+5],b[n+5],tot=1;
    for(ll i=1;i<=n;i++){
        cin>>a[i]>>b[i];
        if(n<=20){
            tot=tot*2;
        }
    }
    vector<ll>v1,v2;
    double ans=1e18;
    for(ll p=0;p<tot;p++){
        ll c=p;
        v1.clear();
        v2.clear();
        for(ll i=1;i<=n;i++){
            if(c%2==0){
                v1.pb(a[i]);
            }
            else{
                if(b[i]>-1){
                    v2.pb(b[i]);
                }
            }
            c/=2;
        }
        sort(all(v1));
        sort(all(v2));
        double cur=0;
        for(ll i=0;i<=min((ll)v2.size(),k);i++){
            if(i+v1.size()>=k){
                double T=0;
                for(ll j=0;j<k-i;j++){
                    T+=v1[j];
                }
                ans=min(ans,cur+(double)T/(i+1));
            }
            if(i<v2.size()){
                cur+=(double)v2[i]/(i+1);
            }
        }
    }
    printf("%.10f",ans);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:44:27: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   44 |             if(i+v1.size()>=k){
      |                ~~~~~~~~~~~^~~
Main.cpp:51:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |             if(i<v2.size()){
      |                ~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 11 / 11
• Subtask 4: 12 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23