# Program to check whether a string is subsequence of other in C++

C++Server Side ProgrammingProgramming

Suppose we have two strings S and T. We have to check whether S is subsequence of T or not.

So, if the input is like S = "abc", T = "adbrcyxd", then the output will be True

To solve this, we will follow these steps −

• if s is same as t, then −

• return true

• n := size of s, m := size of t

• j := 0

• for initialize i := 0, when i < n, update (increase i by 1), do −

• if t[j] is same as s[i], then −

• (increase j by 1)

• if j is same as size of t, then −

• return true

• return false

Let us see the following implementation to get better understanding −

## Example

Live Demo

#include <bits/stdc++.h>
using namespace std;
class Solution {
public:
bool solve(string t, string s) {
if(s == t)
return true;
int n = s.size();
int m = t.size();
int j = 0;
for(int i = 0; i < n; i++){
if(t[j] == s[i])
j++;
if(j == t.size())
return true;
}
return false;
}
};
main(){
Solution ob;
string S = "abc", T = "adbrcyxd";
cout << ob.solve(S, T);
}

## Input

"abc", "adbrcyxd"

## Output

1