蓝桥杯 ALGO-150 算法训练 6-1 递归求二项式系数值

import java.util.Scanner;public class Main {	public static void main(String[] args) {		Scanner sc = new Scanner(System.in);		int k = sc.nextInt();		int n = sc.nextInt();		sc.close();		System.out.PRintln(recu(k, n));	}		private static int recu(int k, int n) {		if (k == 0 || k == n) {			return 1;		}		return recu(k, n - 1) + recu(k - 1, n - 1);	}}