Power of Two Problem & Solution

Given an integer n, return true if it is a power of two. Otherwise, return false. An integer n is a power of two, if there exists an integer x such that n == 2^x.

See the power of two problem on LeetCode.

C++ Solution

#pragma GCC optimize("Ofast")

static const int _=[](){std::ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);return 0;}();

class Solution {
public:
  bool isPowerOfTwo(int n) {
    if (n <= 0) {
      return false;
    }

    return pow(2, (int)log2(n)) == n;
  }
};

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