View Compilation Error

0_0_30182317_8875.cpp: In function 'int main()':
0_0_30182317_8875.cpp:30:5: error: 'fail' was not declared in this scope
     fail = 0;
     ^
0_0_30182317_8875.cpp:34:7: error: 'fail' was not declared in this scope
   if (fail) printf("-1\n");
       ^
0_0_30182317_8875.cpp: At global scope:
0_0_30182317_8875.cpp:37:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_30182317_8875.cpp:38:1: error: expected declaration before '}' token
 }
 ^