CF - A and B and Compilation Errors

#include<iostream>

using namespace std;

int main()
{
 long long fl,sl,tl;
 long long tc,n1,n2,n3,i;
 long long r1,r2;
 
 while(cin>>tc)
 {
  fl=0,sl=0,tl=0;
  for(i=0; i<tc; i++)
  {
   cin>>n1;
   fl=fl+n1;
  }
  
  for(i=0; i<tc-1; i++)
  {
   cin>>n2;
   sl=sl+n2;
  }
  
  for(i=0; i<tc-2; i++)
  {
   cin>>n3;
   tl=tl+n3;
  }
  
  r1=fl-sl;
  r2=sl-tl;
  
  cout<<r1<<endl<<r2<<endl;
 }
 
  
 
 return 0;
}