Grokking the Coding Interview: Patterns for Coding Questions

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Solution: Subset Sum

Problem Statement

Given a set of positive numbers, determine if a subset exists whose sum is equal to a given number ‘S’.

Example 1:

Input: {1, 2, 3, 7}, S=6
Output: True
The given set has a subset whose sum is '6': {1, 2, 3}

Example 2:

Input: {1, 2, 7, 1, 5}, S=10
Output: True
The given set has a subset whose sum is '10': {1, 2, 7}

Example 3:

Input: {1, 3, 4, 8}, S=6
Output: False
The given set does not have any subset whose sum is equal to '6'.

Constraints:

1 <= num.length <= 200
1 <= num[i] <= 100

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