제출 #1150996

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1150996		justkitkat	Let's Win the Election (JOI22_ho_t3)	C++17	0 / 100	2593 ms	328 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define vi vector<int>
#define show3(x,y,z) cout<<#x<<": "<<x<<" | "<<#y<<": "<<y<<" | "<<#z<<": "<<z<<endl;
int n,k;
vector<pair<int,int>>a;
#define ld long double

ld dp(int pos, int collab){
    if(pos==n)return 0;
    ld res=2e18;
    // dont take collab
    res=min(res,dp(pos+1,collab)+a[pos].second/(ld)collab);
    //take collab
    if(a[pos].first!=LLONG_MAX)
        res=min(res,dp(pos+1,collab+1)+a[pos].first/(ld)collab);
    // cout<<"pos: "<<pos<<endl;
    // cout<<a[pos].first<<' '<<a[pos].second<<endl;
    // cout<<res<<endl;
    return res;

}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin>>n>>k;
    a.resize(n);
    for(auto &x:a){
        cin>>x.second>>x.first;
        if(x.first==-1)x.first=LLONG_MAX;
    }
    sort(a.begin(),a.end());
    ld ans=dp(0,1);
    cout<<ans;


}

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