View Compilation Error

0_0_35584072_15447.cpp: In function 'long long int Combination(int, int)':
0_0_35584072_15447.cpp:12:11: error: a function-definition is not allowed here before '{' token
 int main(){
           ^
0_0_35584072_15447.cpp:32:1: error: expected '}' at end of input
 }
 ^