#include <bits/stdc++.h>
using namespace std;

#define printarray(name,size) for(int i=0;i<size;i++){cout<<name[i]<<" ";}cout<<endl;
#define printvector(name,size) for(int i=0;i<size;i++){cout<<name[i]<<" ";}cout<<endl;
#define inputarray(name,size,type) type *name=new type[size]; for(int i=0;i<size;i++){cin>>name[i];}
#define inputvector1(name,size,type) vector<type>name(size);for(int i=0;i<size;i++){cin>>name[i];}
#define inputvector2(name, size, type) name.clear(); name.resize(size);for (ll i = 0; i < size; i++){cin >> name[i];}
#define inputmatrix(name,row,column,type) vector<vector<type>>name(row,vector<type>(column,0)); for(int i=0;i<row;i++){for(int j=0;j<column;j++){cin>>name[i][j];}}
#define loop(i,from,to) for(int i=from;i<to;i++)
#define printmatrix(name,row,column)  for(int i=0;i<row;i++){for(int j=0;j<column;j++){cout<<name[i][j]<<" ";}cout<<endl;}
#define ll long long int
#define sortv(v) sort(v.begin(),v.end());
#define sortrv(v) sort(v.rbegin(),v.rend());
#define sorta(arr,n) sort(arr,arr+n);
#define sortra(arr,n) sort(arr, arr + n, greater<int>());
#define yesno(f) if(f==1){cout<<"YES"<<endl;}else{cout<<"NO"<<endl;}
#define py  cout << "YES" << endl; return
#define pn  cout << "NO" << endl; return


double nthRoot(int A, int N)
{
    // initially guessing a random number between
    // 0 and 9
    double xPre = rand() % 10;
 
    //  smaller eps, denotes more accuracy
    double eps = 1e-3;
 
    // initializing difference between two
    // roots by INT_MAX
    double delX = INT_MAX;
 
    //  xK denotes current value of x
    double xK;
 
    //  loop until we reach desired accuracy
    while (delX > eps)
    {
        //  calculating current value from previous
        // value by newton's method
        xK = ((N - 1.0) * xPre +
              (double)A/pow(xPre, N-1)) / (double)N;
        delX = abs(xK - xPre);
        xPre = xK;
    }
 
    return xK;
}
 

void solve(){
    ll n=0;
    ll a,b;
    cin>>a>>b;

    int operation = 0;
    ll num2 = b;
    ll num = a;
   
    cout<<nthRoot(a, 5);
    
}

int main(){
    ll t=1;
    cin>>t;
    while(t--){
        solve();
    }

    return 0;
}

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
}