Combination Sum

medium Points: 100

Problem Statement

Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target.

Constraints

  • 1 ≤ n ≤ 105
  • Input is a list of integers

Examples

Input: [2, 7, 11, 15], target = 9
Output: [0, 1]
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