[leetcode] 39. Combination Sum

불불이·2021년 2월 2일
0

문제

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. You may return the combinations in any order.

The same number may be chosen from candidates an unlimited number of times. Two combinations are unique if the frequency of at least one of the chosen numbers is different.

It is guaranteed that the number of unique combinations that sum up to target is less than 150 combinations for the given input.

Constraints

  • 1 <= candidates.length <= 30
  • 1 <= candidates[i] <= 200
  • All elements of candidates are distinct.
  • 1 <= target <= 500

풀이 1

function combinationSum(candidates, target) {
    let nums = []; // 집어넣을 숫자들
    // let sum = [];
    let point = 0;
    let answer = [];
    backtracking(candidates, target, nums, point);
    console.log(answer);

    function backtracking(candidates, target, nums, point) {
        if (target == 0) {
            return answer.push(nums.slice());
        }

        for (let i = point; i < candidates.length; i++) {
            if (target < 0) return;
            nums.push(candidates[i]);
            target = target - candidates[i];
            backtracking(candidates, target, nums, i);
            nums.pop();
            target = target + candidates[i];
        }
    }

};

combinationSum([2, 3, 5], 8);
profile
https://nibble2.tistory.com/ 둘 중에 어떤 플랫폼을 써야할지 아직도 고민중인 사람

0개의 댓글