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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4.     ios::sync_with_stdio(0);
  5.     cin.tie(0);
  6.     int n;
  7.     long long V;
  8.     cin>>n>>V;
  9.     vector<long long> v(n),c(n);
  10.     for(int i=0;i<n;i++){
  11.         cin>>v[i];}
  12.     for(int i=0;i<n;i++){
  13.         cin>>c[i];
  14.     }
  15.     vector<pair<double, int>> kromek;
  16.     kromek.reserve(n);
  17.     for(int i=0;i<n;i++){
  18.         if (v[i]>0){
  19.             kromek.push_back({(double)c[i]/v[i],i});
  20.         }}
  21.     sort(kromek.begin(),kromek.end(),greater<>());
  22.     double wynik=0.0;
  23.     long long capacity=V;
  24.     for (auto &p : kromek){
  25.         if (capacity==0){
  26.             break;}
  27.         int i=p.second;
  28.         if (v[i]<=capacity){
  29.             wynik+=c[i];
  30.             capacity-=v[i];}
  31.         else{
  32.             wynik+=p.first*capacity;
  33.             capacity=0;
  34.         }
  35.     }
  36.     cout<<fixed<<setprecision(7)<<wynik<<endl;
  37.     return 0;
  38. }
  39.  
Success #stdin #stdout 0.01s 5292KB
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stdin
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5 10
6 4 2 3 6
10 4 3 5 18
stdout
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24.6666667
https://ideone.com/JTJjZV
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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