class Solution {
    public boolean isSubsequence(String s, String t) {
        if(s.length() == 0) {
            return true;
        }

        for (int i = 0, j = 0; j < t.length(); j++) {
            if(s.charAt(i) == t.charAt(j)) {
                i++;
                if(i == s.length()) {
                    return true;
                }
            }
        }
        return false;
    }
}