#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
using namespace std;
bool comp(pair<double,double> p1 , pair<double,double> p2){
  double a = double ((p1.first)/(p1.second));
  double b = double ((p2.first)/(p2.second));
  
  return a > b;
}
int main() {
  double n,w; cin>>n;
  double val[1005],wght[1005];
  for(int i=0;i<n;i++) cin>>val[i];
  for(int i=0;i<n;i++) cin>>wght[i];
  vector<pair<double,double>> v;
  for(int i=0;i<n;i++) v.push_back({val[i] , wght[i]});
  cin>>w;
  sort(v.begin() , v.end() , comp);
  double curW=0.0,ans=0.0;
  for(int i=0;i<n;i++){
    cout << v[i].first << " " << v[i].second << " " << v[i].first / v[i].second << "\n";
    if(curW == w) break;
    else if(curW + v[i].second <= w){
      curW+=v[i].second;
      ans+=v[i].first;
    }
    else{
      double leftW = w - curW;
      ans += v[i].first/ v[i].second * leftW;
      break;
    }
  }
  cout << ans << "\n";
  
  
}
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C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}