Submission #676663

#	Time	Username	Problem	Language	Result	Execution time	Memory
676663		owoovo	Let's Win the Election (JOI22_ho_t3)	C++17	10 / 100	3 ms	340 KiB

Main

#include<bits/stdc++.h>
#define ll long long
using namespace std;
multiset<pair<int,int>> a,b,c;
long double ans=100000000;
int main(){
    ll n,k;
    cin>>n>>k;
    for(ll i=0;i<n;i++){
        int x,y;
        cin>>x>>y;
        a.insert(make_pair(x,y));
        if(y!=-1){
            b.insert(make_pair(y,x));
        }
    }
    for(ll i=0;;i++){
        long double nowans=0;
        int nowc=1;
        for(auto r:c){
            long double x=r.first;
            nowans+=x/nowc;
            nowc++;
        }
        multiset<pair<int,int>>::iterator s=a.begin();
        for(ll j=i;j<k;j++){
            pair<int,int> u=*s;
            long double x=u.first;
            nowans+=x/nowc;
            s++;
        }
        ans=min(ans,nowans);
        if(b.size()==0){
            break;
        }else{
            pair<int,int> u=*b.begin();
            c.insert(u);
            a.erase(a.find(make_pair(u.second,u.first)));
            b.erase(b.begin());
        }
    }
    cout<<fixed<<ans<<'\n';
    return 0;
}

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