N-th root of a number in C++

You are given the N-th root and the result of it. You need to find the number such that number^N = result.

Let's see some examples.

Input

result = 25
N = 2

Output

5

The 5² = 25. Hence the output in the above example is 5.

Input

result = 64
N = 3

Output

4

The 4³ = 64. Hence the output in the above example is 4.

Algorithm

Implementation

Following is the implementation of the above algorithm in C++

#include <bits/stdc++.h>

using namespace std;

int getNthRoot(int result, int n) {
   int i = 1;
   while (true) {
      if (pow(i, n) == result) {
         return i;
      }
      i += 1;
   }
}
int main() {
   int result = 64, N = 6;
   cout << getNthRoot(result, N) << endl;
   return 0;
}

Output

If you run the above code, then you will get the following result.

2

Hafeezul Kareem

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Updated on: 22-Oct-2021

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