Submission #676636

#	Time	Username	Problem	Language	Result	Execution time	Memory
676636		owoovo	Let's Win the Election (JOI22_ho_t3)	C++14	10 / 100	4 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=1000000;
int main(){
    ll n,k,kk;
    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));
            kk++;
        }
    }
    for(ll i=0;;i++){
        long double nowans=0;
        long double nowc=1;
        for(auto r:c){
            long double x=r.first;
            nowans+=x/nowc;
            nowc++;
        }
        multiset<pair<int,int>>::iterator s=a.begin();
        for(int j=i+1;j<=k;j++){
            pair<int,int> u=*s;
            long double x=u.first;
            nowans+=x/nowc;
            if(u.first==u.second)nowc++;
            s++;
        }
        ans=min(ans,nowans);
        if(b.size()==0){
            break;
        }else{
            c.insert(*b.begin());
            a.erase(a.find(make_pair((*b.begin()).second,(*b.begin()).first)));
            b.erase(b.begin());
        }
    }
    cout<<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