#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int>> momoMarket(int*momoPrices,int n,int*moneyLeft,int q){
    vector<pair<int,int>> me_ms;
    int*prefix = new int[n];
    prefix[0] = momoPrices[0];
    for(int i = 1;i<n;i++){
        prefix[i] = prefix[i-1] + momoPrices[i];
    }
    for(int i = 0;i<q;i++){
        int x = moneyLeft[i];
    	int low = 0;
        int high = n-1;
        int ans = -1;
        while(low<=high){
            int mid = (low + high)/2;
            if(prefix[mid]<=x){
                low = mid+1;
                ans = mid;
            }
            else{
                high = mid-1;
            }
        }
        me_ms.push_back(make_pair(ans+1,x-prefix[ans]));
    }
    return me_ms;

}
int main(){
    // write your code
    int n;
    cin>>n;
    int* momoPrices = new int[n];
for(int i = 0;i<n;i++)cin>>momoPrices[i];
    int q;
    cin>>q;
    int* moneyLeft = new int[q];
    for(int i = 0;i<q;i++)cin>>moneyLeft[i];
   vector<pair<int,int>>me_ms = momoMarket(momoPrices,n,moneyLeft,q);
    for(int i = 0;i<me_ms.size();i++){
        cout<<me_ms[i].first<<" "<<me_ms[i].second<<endl;
    }

    return 0;
}
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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
}