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Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode Solutions in C++, Java, & Python. At Each Problem with Successful submission with all Test Cases Passed, you will get a score or marks and LeetCode Coins. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.
In this post, you will find the solution for the Number of 1 Bits in C++, Java & Python-LeetCode problem. We are providing the correct and tested solutions to coding problems present on LeetCode. If you are not able to solve any problem, then you can take help from our Blog/website.
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Link for the Problem – Number of 1 Bits– LeetCode Problem
Number of 1 Bits– LeetCode Problem
Problem:
Write a function that takes an unsigned integer and returns the number of ‘1’ bits it has (also known as the Hamming weight).
Note:
- Note that in some languages, such as Java, there is no unsigned integer type. In this case, the input will be given as a signed integer type. It should not affect your implementation, as the integer’s internal binary representation is the same, whether it is signed or unsigned.
- In Java, the compiler represents the signed integers using 2’s complement notation. Therefore, in Example 3, the input represents the signed integer.
-3
.
Example 1:
Input: n = 00000000000000000000000000001011 Output: 3 Explanation: The input binary string 00000000000000000000000000001011 has a total of three '1' bits.
Example 2:
Input: n = 00000000000000000000000010000000 Output: 1 Explanation: The input binary string 00000000000000000000000010000000 has a total of one '1' bit.
Example 3:
Input: n = 11111111111111111111111111111101 Output: 31 Explanation: The input binary string 11111111111111111111111111111101 has a total of thirty one '1' bits.
Constraints:
- The input must be a binary string of length
32
.
Number of 1 Bits– LeetCode Solutions
Number of 1 Bits Solution in C++:
class Solution { public: int hammingWeight(uint32_t n) { int ans = 0; for (int i = 0; i < 32; ++i) if ((n >> i) & 1) ++ans; return ans; } };
Number of 1 Bits Solution in Java:
public class Solution { // you need to treat n as an unsigned value public int hammingWeight(int n) { int ans = 0; for (int i = 0; i < 32; ++i) if (((n >> i) & 1) == 1) ++ans; return ans; } }
Number of 1 Bits Solution in Python:
class Solution: def hammingWeight(self, n: int) -> int: ans = 0 for i in range(32): if (n >> i) & 1: ans += 1 return ans
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