Is Subsequence

subsequence.cpp

class Solution {
public:
    bool isSubsequence(string s, string t) {
        queue<char> q;
        for (char ch: s)
            q.push(ch);
            
        for (char ch: t) {
            if (q.empty())
                break;
            if (ch == q.front())
                q.pop();
        }
                
        return q.empty();
    }
};