一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第11天，点击查看活动详情。

前言

由于上课这个效率慢了一点儿，后面还有一篇关于YoloV1论文解读的博文~ 打卡第二天

L1-012 计算指数 (5 分)

送分分在这里插入图片描述


import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int nextInt = scanner.nextInt();
        scanner.close();
        System.out.println("2^"+nextInt+" = "+(1<<nextInt));

    }
}

就喜欢做 level 1 嘿嘿~

L1-010 比较大小 (10 分)

在这里插入图片描述



import java.io.BufferedInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;


public class Main {
    public static void main(String[] args) throws IOException {

        Scanner scanner = new Scanner(new BufferedInputStream(System.in));
        ArrayList<Integer> res = new ArrayList<>();
        for (int i = 0; i < 3; i++) {
            res.add(scanner.nextInt());
        }
        scanner.close();
        res.sort((a,b)->{
            return a-b;
        });

        System.out.print(res.get(0)+"->"+res.get(1)+"->"+res.get(2));

    }
}

L1-007 念数字 (10 分)

在这里插入图片描述

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class Main {
//0: ling
//1: yi
//2: er
//3: san
//4: si
//5: wu
//6: liu
//7: qi
//8: ba
//9: jiu
    static HashMap<Character,String> Mapping = new HashMap<>();
    static {
        Mapping.put('0',"ling");
        Mapping.put('1',"yi");
        Mapping.put('2',"er");
        Mapping.put('3',"san");
        Mapping.put('4',"si");
        Mapping.put('5',"wu");
        Mapping.put('6',"liu");
        Mapping.put('7',"qi");
        Mapping.put('8',"ba");
        Mapping.put('9',"jiu");
        Mapping.put('-',"fu");

    }
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String numbers = scanner.next();
        scanner.close();
        int size = numbers.toCharArray().length;
        char[] numbers_char=numbers.toCharArray();
        for (int i = 0; i < size; i++) {
            if(i==size-1){
                System.out.printf("%s", Mapping.get(numbers_char[i]));
            }else {
                System.out.printf("%s ", Mapping.get(numbers_char[i]));
            }
        }
    }
}

L1-008 求整数段和 (10 分)

在这里插入图片描述这题很简单，注意输出格式呀

import java.util.Scanner;
public class Main
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int m = scan.nextInt();
		int sum=0;
		int count=0;
		for(int i=n;i<=m;i++)
		{
			System.out.printf("%5d",i);
			count++;
			sum=sum+i;
			if(count%5==0&&i!=m)
			{
				System.out.println();
			}
		}
		System.out.printf("\nSum = %d",sum);
	}
}

L1-009 N个数求和 (20 分)

在这里插入图片描述这题的话就是注意使用gcd就行了，求最小公倍数，然后注意输出格式



import java.io.BufferedInputStream;
import java.util.Scanner;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
        in.readLine();
        String[]strings=in.readLine().split(" ");
        String[]s=strings[0].split("/");
        long a=Long.parseLong(s[0]);
        long b=Long.parseLong(s[1]);
        long gg=gcd(a, b);
        a/=gg;
        b/=gg;
        for (int i = 1; i < strings.length; i++) {
            s=strings[i].split("/");
            long c=Long.parseLong(s[0]);
            long d=Long.parseLong(s[1]);
            a=a*d+c*b;
            b*=d;
            gg=gcd(a, b);
            a/=gg;
            b/=gg;

        }
        if(a/b==0&&a%b!=0){
            System.out.print(a+"/"+b);
        }else if(a/b!=0&&a%b==0){
            System.out.print(a/b);
        }else if(a/b!=0&&a%b!=0){
            System.out.print(a/b+" "+a%b+"/"+b);
        }else {
            System.out.print(0);
        }
        in.close();
    }
    private static long gcd(long a,long b) {
        if (a<0) {
            a=-a;
        }
        if (b<0) {
            b=-b;
        }
        return b==0?a:gcd(b, a%b);
    }
}

L1-011 A-B (20 分)

在这里插入图片描述这题我想锤人，可能是平台有问题。同一个代码，一次14 一次 17 神马毛病？

import java.util.Scanner;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {

	public static void main(String[] args) throws IOException {

		BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
		
		String s=in.readLine();
		String b=in.readLine();
		char[] bs=b.toCharArray();
		String news=s;
		for (int i = 0; i < b.length(); i++) {
			String c = String.valueOf(bs[i]);
			 news=news.replace(c, "");
		}
		System.out.println(news);
		
	}

}

然后用Python直接过，我不理解

a=input()
b=list(input())
for i in b:
    a=a.replace(i,"")
print(a)

天梯赛每日打卡02（7-12题解）

前言