View Compilation Error

0_0_21494184_26011.cpp: In function 'void work(long long int)':
0_0_21494184_26011.cpp:20:11: error: a function-definition is not allowed here before '{' token
 int main(){
           ^
0_0_21494184_26011.cpp:55:1: error: expected '}' at end of input
 }
 ^