Help me in solving SYNREARG3 problem

My issue

what will be result in the case

Learning course: Learn C++
Problem Link: CodeChef: Practical coding for everyone

Following will be the correct rearrangement

#include <bits/stdc++.h>
using namespace std;
int main() {
  int a = 2;
  int b = a;
  int c = b + 2;
  cout << c; 
  return 0;