我WA了，附赠代码！大佬救命！！！

#include<bits/stdc++.h>
using namespace std;
int n;
double pi = 3.141593;
void Main(int a){
    if(a == 1)cout << "I love Luogu!";
    if(a == 2)cout << "6" << " " << "4" <<"\n";
    if(a == 3)cout << "3" << "\n" << "12" << "\n" << "2";
    if(a == 4){
        printf(".3lf", 1.0 * 500 / 3);
    }
    if(a == 5)cout<<(220 + 260)/(20 + 12);
    if(a == 6)cout<< sqrt(6 * 6 + 9 * 9);
    if(a == 7)cout << "110" << "\n" << "90" << "\n" << "0";
    if(a == 8)cout<<pi * 10<< "\n" <<pi * 25<< "\n" << 4 / 3 * pi * 125 << "\n" ;
    if(a == 9)cout<< ((((1 + 1) * 2) + 1 * 2) + 1) * 2;
    if(a == 10)cout << "9" << "\n";
    if(a == 11)cout<< 1.0 * 100 / 3;
    if(a == 12)cout << "13" << "\n" <<  "R" << "\n";
    if(a == 13)cout<<(int)(pow(4 / 3 * pi * (4 * 4 * 4 + 10 * 10 * 10), 1.0 * 1 / 3));
    if(a == 14)cout << "50" << "\n";
}
int main(){
    cin >> n;
    Main(n);
    return 0;
}