蓝桥——基础练习1(JAVA)

2021年1月1日
新的一年，新的起点

本试题集共三十道题，这是一到四题

闰年判断

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int y = input.nextInt();
        leapyear(y);
    }
    private static void leapyear(int y) {
        if (y%400 <= 0){
            System.out.println("yes");
        }else if (y%4 <= 0){
            if (y%100 <= 0){
                System.out.println("no");
            }
            System.out.println("yes");
        }else{
            System.out.println("no");
        }
    }
}

01字串

public class Main{
    public static void main(String[] args) {
        for(int i=0;i<=31;i++) {
            String two=Integer.toBinaryString(i);
            if(two.length()<5) {
                for(int j=two.length();j<5;j++) {
                    two="0"+two;
                }
            }
            System.out.println(two);
        }
    }
}

字母图形

import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        int m = input.nextInt();
        letters(n,m);
    }
    public static void letters(int n,int m){
        char[][] a= new char[n][m];
        if (n>=1 && m<=26)
        for (int i=0;i<n;i++){
            for (int j=0;j<m;j++){
                if (j==i){
                    a[i][j] = (char)('A'+0);
                }else{
                    a[i][j] = (char)('A' + Math.abs(i-j));
                }
                System.out.print(a[i][j]);
            }
            System.out.println();
        }
    }
}

数列特征

import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        int [] arr = new int[n];
        if (n>=1 && n<=10000)
            for (int i=0;i<n;i++){
                arr[i] = input.nextInt();
        }
        input.close();
        Arrays.sort(arr);
        int sum,max,min;
        sum = max = min =0;
        for (int i=0;i<n;i++){
            min = arr[0];
            max = arr[n-1];
            sum += arr[i];
        }
        System.out.println(max);
        System.out.println(min);
        System.out.println(sum);
    }
}