import java.io.*;
import java.util.*;
public class Loops {
public int fact(int n){
if (n == 0){
return 1;
}
else {
return n * fact(n-1);
}
}
public int fact2(int n){
int f;
f = 1;
while (n > 0){
f = f * n;
n = n - 1;
}
return f;
}
}