leetcode-patterns-java/LeetCode_Problems/Java/easy/0392. Is Subsequence.java at main · elchibek5/leetcode-patterns-java · GitHub

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

        int i = 0;
        int j = 0;

        while (i < s.length() && j < t.length()) {
            if (s.charAt(i)  == t.charAt(j)) {
                i++;
            }

            j++;
        }

        return i == s.length();
    }
}