View Compilation Error

0_0_38700168_29363.cpp: In function 'void solve()':
0_0_38700168_29363.cpp:28:30: error: 'sum' was not declared in this scope
   28 |         else printf("%lld\n",sum/res);
      |                              ^~~
0_0_38700168_29363.cpp:28:34: error: 'res' was not declared in this scope
   28 |         else printf("%lld\n",sum/res);
      |                                  ^~~