View Compilation Error

0_0_13339737_31722.cpp: In function 'int df(int)':
0_0_13339737_31722.cpp:46:11: error: a function-definition is not allowed here before '{' token
 int main(){
           ^
0_0_13339737_31722.cpp:180:1: error: expected '}' at end of input
 }
 ^