Submission #1023167

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023167		snpmrnhlol	Let's Win the Election (JOI22_ho_t3)	C++17	10 / 100	1 ms	436 KiB

Main

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const ll N = 2e5;
const ll inf = 1e18;
struct state{
    ll a,b;
}v[N];
int p[N],p2[N];
multiset <ll> pos;
int main(){
    cout<<fixed<<setprecision(69);
    int n,k;
    cin>>n>>k;
    for(int i = 0;i < n;i++){
        cin>>v[i].a>>v[i].b;
        if(v[i].b == -1)v[i].b = inf;
        p[i] = i;
        p2[i] = i;
    }
    sort(p,p + n,[&](int a, int b){
         return v[a].a < v[b].a;
    });
    sort(p2,p2 + n,[&](int a, int b){
         return v[a].b < v[b].b;
    });
    ld costb = 0;
    ll costa = 0;
    for(int i = 0;i < k;i++){
        pos.insert(v[p[i]].a);
        costa+=v[p[i]].a;
    }
    ld ans = costa;
    for(int i = 0;i < k;i++){
        ///add it
        costb+=(ld)v[p2[i]].b/(i + 1);
        if(pos.find(v[p2[i]].a) != pos.end()){
            costa-=v[p2[i]].a;
            pos.erase(pos.find(v[p2[i]].a));
        }else{
            costa-=*pos.rbegin();
            pos.erase(prev(pos.end()));
        }
        ans = min(ans,(ld)costb + (ld)costa/(i + 2));
    }
    cout<<ans;
    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