Leet Code 377. Combination Sum IV

https://leetcode.com/problems/combination-sum-iv/

package pep.Day85;

public class LeetCode_377_Combination_Sum_IV {
    public static void main(String[] args) {
        int[] nums = {1, 2, 3};
        int target = 4;
        System.out.println(combinationSum4(nums, target));
    }

    public static int combinationSum4(int[] nums, int target) {
        int[] dp = new int[target + 1];

        dp[0] = 1;
        for (int i = 0; i < dp.length; i++) {
            for (int coin : nums) {
                if (coin <= i) {
                    dp[i] += dp[i - coin];
                }
            }
        }

        return dp[target];
    }
}