How to Solve Target Sum Problem
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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...
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Understanding the Target Sum Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
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. For example, if nums = [2, 1], you can add a '+' before 2 and a '-' before 1 and concatenate them to build the expression "+2-1". Return the number of different expressions that you can build, which evaluates to target.
Target Sum
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How Interview Coder Helps
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Examples
nums = [1,1,1,1,1], target = 35There are 5 ways to assign symbols to make the sum of nums be target 3. -1 + 1 + 1 + 1 + 1 = 3 +1 - 1 + 1 + 1 + 1 = 3 +1 + 1 - 1 + 1 + 1 = 3 +1 + 1 + 1 - 1 + 1 = 3 +1 + 1 + 1 + 1 - 1 = 3
nums = [1], target = 11Constraints
1 <= nums.length <= 200 <= nums[i] <= 10000 <= sum(nums[i]) <= 10001000 <= target <= 1000How Interview Coder Helps with Leetcode Problems
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Frequently Asked Questions
Common questions about solving Target Sum and using Interview Coder during coding interviews.
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