选择题

接口中的方法是为了让重写

编程题
题目

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int a_b = sc.nextInt();
		int b_c = sc.nextInt();
		int ab = sc.nextInt();
		int bc = sc.nextInt();
		
		for(int i = -100;i<=100;i++) {
			for(int j = -100;j<=100;j++) {
				for(int k = -100;k<=100;k++) {
					if((i-j) == a_b) {
						if((j-k) == b_c) {
							if((i+j) == ab) {
								if((j+k) == bc) {
									System.out.print(i+" "+j+" "+k);
									return ;
								}
							}
						}
					}
				}
			}
		}
		System.out.println("No");
		sc.close();
	}
}

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();//A-B
		int b = sc.nextInt();//B-C
		int c = sc.nextInt();//A+B
		int d = sc.nextInt();//B+C
		
		int A = (a+c)/2;
		int B = (b+d)/2;
		int C = B-b;
		if((A-B)!=a || (B-C)!=b || (A+B)!=c || (B+C)!=d)
			System.out.println("No");
		else
			System.out.println(A+" "+B+" "+C);
		
		sc.close();
	}
}

题目2

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int m = sc.nextInt();
		int n = sc.nextInt();
		StringBuffer s = new StringBuffer();
		String res = "0123456789ABCDEF";
		boolean f = false;
		if(m == 0){
			System.out.println(0);
			return ;
		}
		if(m<0) {
			m = -m;
			f = true;
		}
		while(m!=0) {
			s.append(res.charAt(m%n));
			m/=n;
		}
		if(f) {
			s.append('-');
		}
		System.out.println(s.reverse());
		sc.close();
	}
}