蓝桥杯 最大最小公倍数（java题解）

import java.util.*;
import java.math.*;

public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
if(n<1 || n>1000000)
System.exit(0);
if(n<=2)
System.out.println(2);
BigInteger a = BigInteger.valueOf(n-1);
BigInteger b = BigInteger.valueOf(n-2);
BigInteger c = BigInteger.valueOf(n-3);
BigInteger x = BigInteger.valueOf(n);
BigInteger res;
if(n%2!=0) {
res = x.multiply(a).multiply(b);
System.out.println(res);
}
else if(n%2==0 && n%3!=0) {
res = x.multiply(a).multiply(c);
System.out.println(res);
}
else {
res = a.multiply(b).multiply(c);
System.out.println(res);
}
in.close();
}
}