Dear Codeforces team, Whenever I try to submit my solution, I keep encountering this issue. I’ve already tried switching browsers, clearing cookies and cache, and even changing my internet connection, but nothing has worked. Could someone please help me resolve this?

whenever i try to submit my problem it shows "sorry you have been blocked, you can't access codeforces.com"

screenshot

Problem:746B -Decoding

• language:C++
• status: accepted

#include<iostream>
#include<bits/stdc++.h>

using namespace std;
string reverse (string input){  
    string rev;
    for (int i=input.length()-1;i>=0;i--){
        rev+=input[i];
    }
    return rev;
}

string solve(){
    int n;
    cin>>n;
    string s;
    cin>>s;
    string  a; //last
    string b;  //first
    
if(n%2==0){  for(int i=n-1;i>=0;i--)
{
  if(i%2==0) a=a+s[i];
  else b=b+s[i];
}}
else{
      for(int i=n-1;i>=0;i--)
{
  if(i%2==0) b=b+s[i];
  else a=a+s[i];
}
}
// cout<<a<<endl;
// cout<<b<<endl;
cout<<   a+reverse(b);
}


int main(){
    solve();
}

I was solving the following problem @ 479A — Expression

I feel that the given test case had a wrong output.

Test: #8, time: 0 ms., memory: 0 KB, exit code: 0, checker exit code: 1, verdict: WRONG_ANSWER

Input 6 7 1 Output 49 Answer 48