Problem:
Score : 200 points

Problem Statement

Given are strings S and T. Consider changing S to T by repeating the operation below. Find the minimum number of operations required to do so.

Operation: Choose one character of S and replace it with a different character.

Constraints

S and T have lengths between 1 and 2\times 10^5 (inclusive).

S and T consists of lowercase English letters.

S and T have equal lengths.

Input

Input is given from Standard Input in the following format:

S
T

Output

Print the answer.

Sample Input 1

cupofcoffee
cupofhottea

Sample Output 1

4

We can achieve the objective in four operations, such as the following:

First, replace the sixth character c with h.

Second, replace the eighth character f with t.

Third, replace the ninth character f with t.

Fourth, replace the eleventh character e with a.

Sample Input 2

abcde
bcdea

Sample Output 2

5

Sample Input 3

apple
apple

Sample Output 3

0

No operations may be needed to achieve the objective.

Solution in C++ (GCC 9.2.1) (judge verdict: Accepted)

/*à¥à¥*/
/* I have already deleted My old account because somebody stole my code
and i have no idea how. If you are copying this code atleast make it look different.
Change variable names or change some Data structres or anything just make sure MOSS do not
Detect Anything.
Yours Faithfully
Shobhit Yadav */

/* I do not fear this new challenge. Rather like a true warrior I will rise to meet it. 
                                       -Prince Vegeta  */

 /* â€œStrength is the only thing that matters in this world. Everything else is just a delusion for the weak.â€ â€“ Vegeta */

#include<bits/stdc++.h>
using namespace std;
#define ll long long 



ll A,B,K;
/*ll freq[200005];*/
void solve(){
   /*memset(freq,0,sizeof(freq));*/
string s,t;
ll county = 0;

cin>>s>>t;

for(ll i = 0 ; i<s.length() ; i++){
  if(s[i] != t[i])
    county++;
}

 cout<<county<<'\n';


}



int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  
   solve();

  return 0;
}