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Minimum Elements for Target Sum Solution

Problem Statement

You are given an array of integers `nums` and an integer `target`. Your task is to find the minimum number of elements from `nums` that sum up exactly to `target`. Each element `nums[i]` can be included in the sum at most once. If no such combination of elements exists, return -1.

Example 1

Input

nums = [3, 5, 7, 10], target = 15

Output

Explanation: The combination `[5, 10]` sums to 15 and uses 2 elements. Other combinations like `[3, 5, 7]` also sum to 15 but use 3 elements. 2 is the minimum.

Constraints

1 <= nums.length <= 100
-1000 <= nums[i] <= 1000
-10^5 <= target <= 10^5
Each `nums[i]` can be used at most once.

Minimum Elements for Target Sum Solution

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