编程题

快到碗里来

import java.math.BigDecimal;
import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner sc = new Scanner(System.in);while (sc.hasNext()) {BigDecimal n = sc.nextBigDecimal();BigDecimal r = sc.nextBigDecimal();BigDecimal len = new BigDecimal("6.28").multiply(r);System.out.println(n.compareTo(len) == 1 ? "No" : "Yes");}}
}

跳台阶问题

public class Solution {public int jumpFloorII(int target) {//整数x*2^n = x<<n;//2^(target-1)=1*2^(target-1)return 1<<--target;}
}