算法训练 6-1 递归求二项式系数值

package ALGO_150;
import java.util.Scanner;
public class Main {
public static int lcd(int n,int k){
int res;
if(k==0||k==n)
res=1;
else
res=lcd(n-1,k)+lcd(n-1,k-1);
return res;
}
public static void main(String[] args) {
Scanner cin=new Scanner(System.in);
int k=cin.nextInt();
int n=cin.nextInt();
int res=lcd(n,k);
System.out.print(res);
}
}