377. Combination Sum IV

class Solution {
    public int combinationSum4(int[] nums, int target) {
        int[] dp = new int[target + 1];
        dp[0] = 1;

        for(int i = 1; i<=target; i++){
            for(int num : nums){
                if(i - num >= 0){
                    dp[i] += dp[i - num];
                }
            }
        }
        return dp[target];
    }
}