Solve problems by organizing data through sorting and applying binary search, two-pointer, and sliding window for efficient solutions.

Coding

Combines sorting and searching techniques to effectively process and retrieve data, often using sorting algorithms and binary search to optimize problem-solving in datasets that can be ordered.

Sort and Search

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Behavioral

For the input `nums = [3, 5, 2]`, what is the sum of elements between indexes `left = 3` and `right = 6` in the sorted subarray sums?

For the input <code>nums = [3, 5, 2]</code>, what is the sum of elements between indexes <code>left = 3</code> and <code>right = 6</code> in the sorted subarray sums?

For the input `nums = [10]`, what is the total sum of all elements between indices `left = 1` and `right = 1` in the sorted subarray sums?

For the input <code>nums = [10]</code>, what is the total sum of all elements between indices <code>left = 1</code> and <code>right = 1</code> in the sorted subarray sums?

For the input `nums = [4, 1, 7, 3]`, what is the sum of elements from index `left = 6` to `right = 10` in the sorted subarray sums?

For the input <code>nums = [4, 1, 7, 3]</code>, what is the sum of elements from index <code>left = 6</code> to <code>right = 10</code> in the sorted subarray sums?

Range Sum of Sorted Subarray Sums

Range Sum of Sorted Subarray Sums

# 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: `range_sum` \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 `range_sum` 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 `range_sum`. \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) `range_sum`.  \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) `range_sum`.  \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
        """

        def range_sum_eval(nums, n, left, right):
            store_subarray = []
            for i in range(len(nums)):
                sum = 0
                for j in range(i, len(nums)):
                    sum += nums[j]
                    store_subarray.append(sum)
        
            store_subarray.sort()
        
            range_sum = 0
            mod = 10**9 + 7
            for i in range(left - 1, right):
                range_sum = (range_sum + store_subarray[i]) % mod
            return range_sum


        expected = range_sum_eval(self.__inputs[0], self.__inputs[1], self.__inputs[2], self.__inputs[3])
        actual = self.__actual_outputs[0]
        expected_outputs = [] 
        expected_outputs.append(expected)

        if json.dumps(expected) == json.dumps(actual):
            self.__edu_result.store_result(expected_outputs, TestCaseResult.PASS)
        else:
            self.__edu_result.store_result(expected_outputs, TestCaseResult.FAIL)

        return self.__edu_result

def range_sum(nums, n, left, right):

    # Replace the following placeholder return statement with your code
    return -1


range_sum_testcases_1.yaml

testcases:
  - name: "testcase 1"
    inputs:
    - 1: [1, 2, 3, 4]
    - 2: 4
    - 3: 1
    - 4: 5
    output:
    - 1: 13
  - name: "testcase 2"
    inputs:
    - 1: [1, 2, 3, 4]
    - 2: 4
    - 3: 3
    - 4: 4
    output:
    - 1: 6
  - name: "testcase 3"
    inputs:
    - 1: [3, 5, 2]
    - 2: 3
    - 3: 3
    - 4: 6
    output:
    - 1: 30
  - name: "testcase 4"
    inputs:
    - 1: [7, 1, 3, 2]
    - 2: 4
    - 3: 5
    - 4: 8
    output:
    - 1: 26
  - name: "testcase 5"
    inputs:
    - 1: [6, 4, 1]
    - 2: 3
    - 3: 4
    - 4: 6
    output:
    - 1: 27

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

def validate_inputs(self) -> None:
 """
 Validates the inputs based on the constraints of the problem:
 - nums.length should be between 1 and 1000.
 - nums[i] should be between 1 and 100.
 - left and right should be valid indices in the range [1, n * (n + 1) / 2].
 Store the result using self.store_result(error_msg, status).
 return : void
 """

 nums = self.__inputs[0]
 n = self.__inputs[1]
 left = self.__inputs[2]
 right = self.__inputs[3]

 if n < 1 or n > 1000:
 self.store_result("Array length should be between 1 and 1000", ValidationFunction.FAIL)
 elif any(num < 1 or num > 100 for num in nums):
 self.store_result("All elements in nums should be between 1 and 100", ValidationFunction.FAIL)
 elif left < 1 or right > n * (n + 1) // 2:
 self.store_result("Indices left and right should be within the valid range of sorted subarray sums", ValidationFunction.FAIL)
 elif left > right:
 self.store_result("Index 'left' should not be greater than 'right'", ValidationFunction.FAIL)
 else:
 self.store_result("", ValidationFunction.PASS)

Try to solve the Range Sum of Sorted Subarray Sums problem.

Problem: Range Sum of Sorted Subarray Sums

Statement

Examples

Understand the problem

Figure it out!