392. Is Subsequence

Runtime    0 ms
Beats      100%


Memory     40.2 MB
Beats      80.22%


class Solution {
    public boolean isSubsequence(String s, String t) {
         char[]T = t.toCharArray();
        char[]S = s.toCharArray();
        int m = T.length, n = S.length;

        if(n==0) 
            return true;

        int s_ptr=0;
        for(int i=0;i<m;i++){
            if(S[s_ptr]==T[i])
                s_ptr++;
            if(s_ptr==n)
                return true;
        }

        return false;
        
    }
}