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Medium

Find the subarray with sum to a Given Value.

Objective: Given an array (non-negative) and an integer, Find the Subarray whose sum is equal to the given integer.

Examples:

int[] arrA = { 25, 12, 14, 22, 19, 15, 10, 23 };
Integer = 55

Output

 : 55 is found between indexes 2 and 4
And Elements are : 14 22 19

Approach :

Naive Approach: Use 2 loops . Time Complexity - O(n2).

Better Approach: Time Complexity - O(n)

  • Idea is to keep adding all the elements to the currSum
  • Keep checking if the currSum<Sum
  • If currSum gets greater than the Sum then start reducing the currSum from the beginning of the array using "start"if any time currSum=Sum, Stop and return

Code:


Output:

55 is found between indexes 2 and 4
And Elements are :  14 22 19

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