Combination Sum IV
Given an integer array with all positive numbers and no duplicates, find the number of possible combinations that add up to a positive integer target. Tags: Dynamic Programming
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Solution
class Solution:
def combinationSum4(self, nums: List[int], target: int) -> int:
dp = [0 for i in range(target + 1)]
dp[0] = 1
for i in range(1, target + 1):
for j in range(len(nums)):
num = nums[j]
if num <= i:
dp[i] += dp[i - num]
return dp[target]