115 Leetcode 494 Target Sum NcvqCbLwX O

Web Reference: Target Sum - You are given an integer array nums and an integer target. You want to build an expression out of nums by adding one of the symbols '+' and '-' before each integer in nums and then concatenate all the integers. Each step branches into two paths, and we sum the number of ways to reach the target. If the index i goes out of bounds, we return 1 if the current sum equals the target; otherwise, we return 0. Apr 9, 2026 · Given an integer array nums and a target integer, find the number of ways to assign '+' or '-' signs to each element so that the sum equals the target. Transform the problem into a subset sum problem by finding how many ways we can select elements to form a positive subset.

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