View Compilation Error

0_0_18845277_13666.cpp: In function 'int main()':
0_0_18845277_13666.cpp:63:24: error: 'ans' was not declared in this scope
   printf("%d\n", (int)(ans + 0.5));
                        ^
0_0_18845277_13666.cpp: At global scope:
0_0_18845277_13666.cpp:65:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_18845277_13666.cpp:66:1: error: expected declaration before '}' token
 }
 ^