House Robber LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

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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 House Robber 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.

Use “Ctrl+F” To Find Any Questions Answer. & For Mobile User, You Just Need To Click On Three dots In Your Browser & You Will Get A “Find” Option There. Use These Option to Get Any Random Questions Answer.

About LeetCode

LeetCode is one of the most well-known online judge platforms to help you enhance your skills, expand your knowledge and prepare for technical interviews. 

LeetCode is for software engineers who are looking to practice technical questions and advance their skills. Mastering the questions in each level on LeetCode is a good way to prepare for technical interviews and keep your skills sharp. They also have a repository of solutions with the reasoning behind each step.

LeetCode has over 1,900 questions for you to practice, covering many different programming concepts. Every coding problem has a classification of either EasyMedium, or Hard.

LeetCode problems focus on algorithms and data structures. Here is some topic you can find problems on LeetCode:

  • Mathematics/Basic Logical Based Questions
  • Arrays
  • Strings
  • Hash Table
  • Dynamic Programming
  • Stack & Queue
  • Trees & Graphs
  • Greedy Algorithms
  • Breadth-First Search
  • Depth-First Search
  • Sorting & Searching
  • BST (Binary Search Tree)
  • Database
  • Linked List
  • Recursion, etc.

Leetcode has a huge number of test cases and questions from interviews too like Google, Amazon, Microsoft, Facebook, Adobe, Oracle, Linkedin, Goldman Sachs, etc. LeetCode helps you in getting a job in Top MNCs. To crack FAANG Companies, LeetCode problems can help you in building your logic.

Link for the ProblemHouse Robber– LeetCode Problem

House Robber– LeetCode Problem

Problem:

You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent houses have security systems connected and it will automatically contact the police if two adjacent houses were broken into on the same night.

Given an integer array nums representing the amount of money of each house, return the maximum amount of money you can rob tonight without alerting the police.

Example 1:

Input: nums = [1,2,3,1]
Output: 4
Explanation: Rob house 1 (money = 1) and then rob house 3 (money = 3).
Total amount you can rob = 1 + 3 = 4.

Example 2:

Input: nums = [2,7,9,3,1]
Output: 12
Explanation: Rob house 1 (money = 2), rob house 3 (money = 9) and rob house 5 (money = 1).
Total amount you can rob = 2 + 9 + 1 = 12.

Constraints:

  • 1 <= nums.length <= 100
  • 0 <= nums[i] <= 400
House Robber– LeetCode Solutions
House Robber  Solution in C++:
class Solution {
 public:
  int rob(vector<int>& nums) {
    int prev1 = 0;  // dp[i - 1]
    int prev2 = 0;  // dp[i - 2]

    for (const int num : nums) {
      const int dp = max(prev1, prev2 + num);
      prev2 = prev1;
      prev1 = dp;
    }

    return prev1;
  }
};
House Robber Solution in Java:
class Solution {
  public int rob(int[] nums) {
    final int n = nums.length;
    if (n == 0)
      return 0;
    if (n == 1)
      return nums[0];

    // dp[i] := max money of robbing nums[0..i]
    int[] dp = new int[n];
    dp[0] = nums[0];
    dp[1] = Math.max(nums[0], nums[1]);

    for (int i = 2; i < n; ++i)
      dp[i] = Math.max(dp[i - 1], dp[i - 2] + nums[i]);

    return dp[n - 1];
  }
}
House Robber Solution in Python:
class Solution:
  def rob(self, nums: List[int]) -> int:
    prev1 = 0  # dp[i - 1]
    prev2 = 0  # dp[i - 2]

    for num in nums:
      dp = max(prev1, prev2 + num)
      prev2 = prev1
      prev1 = dp

    return prev1

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