Submission #640742

#	Time	Username	Problem	Language	Result	Execution time	Memory
640742		ck_platypus	Let's Win the Election (JOI22_ho_t3)	C++14	5 / 100	16 ms	320 KiB

Main

#include <iostream>
#include <string>
#include <cmath>
#include <vector>
#include <algorithm>
#include <utility>
#include <bitset>
#include <climits>
#include <set>
#include <map>
#include <iomanip>
#include <queue>
#include <cstring>
#include <fstream>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define pll pair<ll, ll>
#define pii pair<int, int>
#define f first
#define s second
#define inf 1000000000000000
bool cmp2(pll a, pll b){
    return a.s<b.s;
}
bool cmp(pll a, pll b){
    return a.f<b.f;
}
int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	ll n, k;
    cin >> n >> k;
    pll arr[n];
    ll cnt=n;
    for(int i=0;i<n;i++) cin >> arr[i].f >> arr[i].s;
    for(int i=0;i<n;i++){
        if(arr[i].s==-1){
            arr[i].s=500000;
            cnt--;
        }
    }
    double ans=-1, cur;
    for(int i=0;i<min(cnt+1, k);i++){
        cur=0.0;
        sort(arr, arr+n, cmp2);
        for(int j=0;j<i;j++) cur+=double(arr[j].s)/double(j+1);
        sort(arr+i, arr+n, cmp);
        for(int j=i;j<k;j++) cur+=double(arr[j].f)/double(i+1);
        if(ans==-1) ans=cur;
        else ans=min(ans, cur);
    }
    ll kkk=ans, kk=ans*1000;
    cout << kkk << "." << kk%1000 << endl;
    return 0;
}

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