#205Medium· asked at 2 companies
Combination Sum IV
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What we know
Example 1
Input: nums = [1,2,3], target = 4 Output: 7
(1,1,1,1), (1,1,2), (1,2,1), (1,3), (2,1,1), (2,2), (3,1).
Example 2
Input: nums = [9], target = 3 Output: 0
Constraints
- •
1 <= nums.length <= 200 - •
1 <= nums[i] <= 1000 - •
All the elements of
numsare unique. - •
1 <= target <= 1000