#include<iostream>
using namespace std;
int main() {
	int n;
	cout<<"n=";
	cin>>n;
	switch(n) {
		case 1:
			cout<<"f=n"<<endl;
			break;
		case 2:
			cout<<"f=n*n"<<endl;
			break;
		case 3:
			cout<<"f=n*n*n"<<endl;
			break;
		default:
			cout<<"f=0";
			break;
	}
	return 0;
}