蓝桥杯 ALGO-150 算法训练 6-1 递归求二项式系数值 java版

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);
}
}