/*

Given two strings s and t, return true if s is a subsequence of t,

or false otherwise.

A subsequence of a string is a new string that is formed from the

original string by deleting some (can be none) of the characters

without disturbing the relative positions of the remaining characters. (i.e., "ace" is a subsequence of "abcde" while "aec" is not).

Example 1:

Input: s = "abc", t = "ahbgdc"

Output: true

Example 2:

Input: s = "axc", t = "ahbgdc"

Output: false

*/

public class LeetCode392 {

static public boolean isSubsequence(String s, String t) {

int i=0,j=0;

if(s.length()==0) return true;

while(i<s.length()&&j<t.length()){

if(s.charAt(i)==t.charAt(j)){

i++; j++;

}

else j++;

}

if(i==s.length()) return true;

return false;

}

public static void main(String[] args) {

System.out.println(isSubsequence("axc", "ahbgdc"));

}

}