Mã chấm: 256903

Main.cc: In function ‘long long unsigned int tinhGiaiThua(int)’:
Main.cc:13:42: error: a function-definition is not allowed here before ‘{’ token
     unsigned long long tinhCatalan(int n){
                                          ^
Main.cc:17:12: error: a function-definition is not allowed here before ‘{’ token
 int main() {
            ^
Main.cc:29:1: error: expected ‘}’ at end of input
 }
 ^