题解 | #杨辉三角的变形#
杨辉三角的变形
http://www.nowcoder.com/practice/8ef655edf42d4e08b44be4d777edbf43
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (sc.hasNext()) {
int num = sc.nextInt();
if (num < 3) {
System.out.println(-1);
return;
}
int remainder = num % 4;
switch (remainder) {
case 0:
System.out.println(3);
break;
case 2:
System.out.println(4);
break;
default:
System.out.println(2);
}
}
}
}