class Solution {
public:
    bool isSubsequence(string s, string t) {

    int si = 0; // s index
    int ti = 0; // t index
    int matches = 0;

    while ( ( matches != s.size() ) && (ti != t.size()) ) // does loop until matches = s.size() or t index reaches end of t string
    {
        if (s[si] == t[ti])
        {
            matches++;
            si++;
        }
        ti++;
    }

    cout << "Matches = " << matches ;
    return (matches == s.size());

    }
};