Grokking the Coding Interview: Patterns for Coding Questions
Ask Author
Back to course home

0% completed

Vote For New Content
Subarray Sum Equals K (medium)
Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Problem Statement

Given an array nums containing n integers and integer k, return the total number of subarrays having sum equal to k.

A subarray is defined as a contiguous non-empty sequence of the array elements.

Examples

Example 1:

  • Input: nums = [1, 2, 3], k = 3
  • Expected Output: 2
  • Justification: There are two subarrays that sum to 3: [1, 2] and [3].

Example 2:

  • Input: nums = [10, 2, -2, -20, 10], k = -10
  • Expected Output: 3
  • Justification: Three subarrays sum up to -10: [10, 2, -2, -20], [2, -2, -20, 10], and [-20, 10].

Example 3:

  • Input: nums = [5, 1, 2, -3, 4, -2], k = 3
  • Expected Output: 2
  • Justification: There are two subarrays that sum to 3: [2, -3, 4], and [1, 2].

Try it yourself

Try solving this question here:

Python3
Python3
. . . .

.....

.....

.....

Like the course? Get enrolled and start learning!

Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible