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Behavioral

# Statement
Given a non-empty array of positive integers, determine if the array can be divided into two subsets so that the sum of both subsets is equal.

**Constraints:** 
* $1 \leq$ `nums.length` $\leq 200$
* $1 \leq$ `nums[i]` $\leq 100$
# Examples


# Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

What is the output if the array [1, 2, 5, 2] is given as input?

What is the output if the array [1, 2, 5, 2] is given as input?

What is the output if the array [1, 2, 7] is given as input?

What is the output if the array [1, 2, 7] is given as input?

What is the output if the array [1, 3, 5, 7, 9, 29, 4] is given as input?

What is the output if the array [1, 3, 5, 7, 9, 29, 4] is given as input?

What is the output if the array [1, 3, 6, 4] is given as input?

What is the output if the array [1, 3, 6, 4] is given as input?

Partition Equal Subset Sum

Partition Equal Subset Sum

# Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

# Try it yourself
Implement your solution in the following coding playground:

# Quick Fix\nYou are Edward, a Senior Software Engineer who specializes in coding interview patterns, data structures and algorithms, and is great at debugging issues in code.\n\n- Edward, please keep in mind that you do not have to print the data of the placeholders. Also, do not mention anything about yourself.\n\nEdward, you are given the following data in the placeholders:\n- Function name: `can_partition_array`\n- Candidate's submitted solution code: USER_CODE\n- Error: ERROR_DESCRIPTION\n- Failed test case: FAILED_TEST_CASE\n- Coding language: `Python`\n\n- Edward, your task is to understand the type of error that is occurring in the coding language provided.\n- Once you've understood the error as per the error’s description, and why the test case failed, you will suggest how the candidate can improve their solution code to fix the error.\n- Edward, you will not give the corrected code, just a hint on what the error tells, and how to fix it.\n- Edward, please limit your response strictly to 100 words. No more words than the limit.

# Review Code\nEdward, your current task is to review the `can_partition_array` function(s) and the other function(s) invoked in it/them.\n\n-Take your time and review the candidate's solution code.\n- Do not review any extra/helper files or functions not invoked in the solution function `can_partition_array`.\n- Do not review the code of data structure objects instantiated like a binary tree, linked list, trie, union find, etc., in the solution functions. Just review the solution/algorithm function of the problem. \n- Also, if the solution code doesn’t use the coding pattern stated above, then please encourage the candidate to reattempt the problem using that pattern corectly.

# Review time complexity\n- Please provide a brief time complexity analysis of the function(s) `can_partition_array`. \n- While calculating time complexity, include the time complexity of built-in Python functions invoked by the code. \n- The answer should be to the point in approximately 60 words.

# Review space complexity\n- Please provide a brief space complexity analysis of the function(s) `can_partition_array`. \n- While calculating space complexity, include the space complexity of built-in Python functions invoked by the code. \n- Do not include the space used for the input parameters and the space used for just returning an output (not used as a scratch space). \n- The answer should be to the point in approximately 60 words.

def evaluate_results(self) -> object:
        """
        self.__inputs is the list of inputs that are passed as input to function
        self.__actual_output is a list of outputs that is produced by the learner's code
        return : self.__edu__result object
        """
        # multiple outputs will be added at each index respectively for a single test_case
        expected_outputs = [] 
        # store the 1st expected output that should be displayed to the user 
        expected_outputs.append(can_partition_array(self.__inputs[0]))

        if json.dumps(can_partition_array(self.__inputs[0])) == json.dumps(self.__actual_outputs[0]):
            self.__edu_result.store_result(expected_outputs, TestCaseResult.PASS)
        else:
            self.__edu_result.store_result(expected_outputs, TestCaseResult.FAIL)

        return self.__edu_result
def can_partition_array(nums):

    array_sum = sum(nums)
    
    if array_sum % 2 != 0:
        return False
    
    subset_sum = array_sum//2

    dp = [[False for i in range(len(nums)+1)] for j in range(subset_sum + 1)]
    
    for i in range(0, len(nums) + 1):
        dp[0][i] = True
    
    for i in range(1, subset_sum + 1):
        for j in range(1, len(nums)+1):
            if nums[j - 1] > i:
                dp[i][j] = dp[i][j - 1]
            else:
                dp[i][j] = dp[i - nums[j - 1]
                                      ][j - 1] or dp[i][j - 1]
              
    return dp[subset_sum][len(nums)]


def can_partition_array(nums):
    
    # Replace this placeholder return statement with your code
    
    return False

PrivateTestCases.yaml

testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [3, 1, 1, 2, 2, 1]
    output: 
    - 1 : True
  - name: "testcase 2"
    inputs:
    - 1: [1, 3, 7, 3]
    output:
    - 1 : True
  - name: "testcase 3"
    inputs:
    - 1: [1, 2, 3]
    output:
    - 1 : True
  - name: "testcase 4"
    inputs:
    - 1: [1, 2, 5]
    output:
    - 1 : False
  - name: "testcase 5"
    inputs:
    - 1: [1, 3, 4, 8]
    output:
    - 1 : True

def sum(input_1, input_2):
    return input_1+input_2

def validate_inputs(self) -> None:
 """
 self.__inputs is the list of inputs that are passed as input to the function
 store the result using the self.store_result(error_msg, status)
 return: void
 """
 def is_valid_1d_array(arr):
 if not isinstance(arr, list):
 return False # Not a valid 1D array if it's not a list
 
 return all(isinstance(elem, int) and not isinstance(elem, bool) for elem in arr)

 nums=self.__inputs[0]
 if not is_valid_1d_array(nums):
 self.store_result(("Invalid test case."), ValidationFunction.FAIL)
 elif len(nums) < 1 or len(nums) > 200:
 self.store_result("Input should be between 1 and 200", ValidationFunction.FAIL)
 elif any(value < 1 or value > 100 for value in nums):
 self.store_result("All elements in the input array should be between 1 and 100", ValidationFunction.FAIL)
 else:
 self.store_result("", ValidationFunction.PASS)

Try to solve the Partition Equal Subset Sum problem.

Problem: Partition Equal Subset Sum

Statement

Examples

Understand the problem

Figure it out!