class Solution {
    public int translateNum(int num) {
        char[] ch = String.valueOf(num).toCharArray();
        int n = ch.length;
        int[] dp = new int[n + 1];
        dp[0] = 1;
        dp[1] = 1;

        for(int i = 2; i <= n; i++){
            if(ch[i - 2] == '1' || ch[i - 2] == '2' && ch[i - 1] <= '5'){
                dp[i] = dp[i - 1] + dp[i - 2];
            }else dp[i] = dp[i - 1];
        }

        return dp[n];
    }
}