leetcode

0 class Solution {

1 public:

2 int countVowelStrings(int n) {

3 int vec[5] = {1, 1, 1, 1, 1};

4 for (int i = 1; i <= n; i++) {

5 for (int i = 4, sum = 0; i >= 0; i--)

6 vec[i] = sum += vec[i];

7 }

8 return vec[0];

9 }

10 };