Simple question

Question

PROBLEM

Write a C++ program to compute the powers of 2.

The program must take a single integer number 'n' as input and print the value of 2 raised to the power 'n'.

INPUT FORMAT

A single integer ranging from 0 to 30 (Both Inclusive)

You need to ensure that you handle all values within this range.

You are not required to verify that the input integer in within range or not.

CONSTRAINTS

0 <= n <= 30

OUTPUT FORMAT 

Output a single integer denoting the value of 2 raised to the power n

SAMPLE EXAMPLE: 
     Input - 4
     Output - 16 (computed as 2^4 = 2*2*2*2)

Answer 1

#include <cmath>
#include <iostream>
int main(){

int value;
std::cin >> value;
std::cout <<pow(2,value);

return 0;
}

Answer 2

#include <iostream>

int main() {
unsigned v;
std::cin >> v;
std::cout << (1<<v);
return 0;
}

*Hope this is not your Homework, lol.*