牛客编程题（一）

//https://www.nowcoder.com/practice/ebe941260f8c4210aa8c17e99cbc663b?tpId=37&&tqId=21292&rp=1&ru=/ta/huawei&qru=/ta/huawei/question-ranking

import java.util.Arrays;
import java.util.Scanner;

public class Main0 {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		while(sc.hasNext()) {
		int r = sc.nextInt();
		int c = sc.nextInt();
		int n = sc.nextInt();
		int[][] result = new int[r][n];
		int array1[][] = new int[r][c];
		int array2[][] = new int[c][n];

		for (int i = 0; i < array1.length; i++) {
			for (int j = 0; j < array1[i].length; j++) {
				array1[i][j] = sc.nextInt();
			}

		}

		for (int i = 0; i < array2.length; i++) {
			for (int j = 0; j < array2[i].length; j++) {
				array2[i][j] = sc.nextInt();
			}
		}
		
		for(int i=0;i<array1.length;i++) {//循环第一个矩阵的行数
			for(int j=0;j<array2[0].length;j++) {//循环第二个矩阵的列数
				for(int k=0;k<array1[0].length;k++) {//循环第一个矩阵的列数，也是第二个矩阵的行数
					result[i][j]+=array1[i][k]*array2[k][j];
				}
				System.out.print(result[i][j]+" ");
			}

			System.out.println();
		}
}
	 
	
	}
	
	
}

//https://www.nowcoder.com/practice/4d604603fae94a26b59b7bc18f363bc0?tpId=107&tags=&title=&diffculty=0&judgeStatus=0&rp=1

public class Main2 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()) {
			
			int weight = sc.nextInt();
			int hight = sc.nextInt();
			double BMI = weight/((hight/100.0)*(hight/100.0));
			if( BMI<18.5) {
				System.out.println("Underweight");
			}
			if(BMI<=23.9&&BMI>=18.5) {
				System.out.println("Normal");
			}
			if(BMI>23.9&&BMI<=27.9) {
				System.out.println("Overweight");
			}
			if(BMI>27.9)
				System.out.println("Obese");
		}
	}

}

//https://www.nowcoder.com/practice/52c18a3b49a54fc98107fbdde1415f90?tpId=107&&tqId=33326&rp=1&ru=/ta/beginner-programmers&qru=/ta/beginner-programmers/question-ranking
3.

public class Main3 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			int c = sc.nextInt();
			int max1 = Math.max(a, b);
			int max2 = Math.max(b, c);
			System.out.println(Math.max(max1, max2));
		}
		

	}
	
}

//https://www.nowcoder.com/practice/a8b018667e274af29b5f76a6673450fc?tpId=107&&tqId=33325&rp=1&ru=/ta/beginner-programmers&qru=/ta/beginner-programmers/question-ranking
4.

public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while (sc.hasNext()) {
			int number = sc.nextInt();
			if (number % 2 == 0) {
				System.out.println("Even");
			}
			if (number % 2 != 0) {
				System.out.println("Odd");
			}
		}

	}

}

//https://www.nowcoder.com/practice/cd052308a1c44a88ad00255f312c3e14?tpId=107&&tqId=33320&rp=1&ru=/ta/beginner-programmers&qru=/ta/beginner-programmers/question-ranking

import java.util.Arrays;
import java.util.Scanner;

public class Main5 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while (sc.hasNext()) {
			int[] array = new int[sc.nextInt()];
			for (int i = 0; i < array.length; i++) {
				array[i] = sc.nextInt();
			}
			Arrays.sort(array);
			for(int i=0;i<array.length/2;i++) {
				int temp = array[i];
				 array[i]= array[array.length-i-1];
				 array[array.length-i-1] = temp;
			}
			for (int i = 0; i < 5; i++) {
				
					System.out.print(array[i]+" ");
			}
		}
	}

}

//https://www.nowcoder.com/practice/b8f770674ba7468bb0a0efcc2aa3a239?tpId=107&&tqId=33336&rp=1&ru=/ta/beginner-programmers&qru=/ta/beginner-programmers/question-ranking

public class Main6 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()) {
			double number1 = sc.nextDouble();
			String xx = sc.nextLine();
			double number2 = sc.nextDouble();
			if(xx!="+"||xx!="*"||xx!="-"||xx!="/") {
				System.out.println("Invalid operation!");
			}
			if(xx=="/"&&number2==0) {
				System.out.println("Wrong!Division by zero!");
			}
			if(xx=="+") {
			double res =number1+number2;
			System.out.println(number1+"+"+number2+"="+res);
			}
			if(xx=="-") {
				double res =number1-number2;
				System.out.println(number1+"-"+number2+"="+res);
				}
			if(xx=="*") {
				double res =number1*number2;
				System.out.println(number1+"*"+number2+"="+res);
				}
			if(xx=="/") {
				double res =number1/number2;
				System.out.println(number1+"/"+number2+"="+res);
				}
			
		}
	}

}

//https://www.nowcoder.com/practice/08b28e61ff6345febf09969b3a167f7e?tpId=107&tags=&title=&diffculty=0&judgeStatus=0&rp=1

import java.util.Scanner;

public class Main7 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while (sc.hasNext()) {
			double weight = sc.nextDouble();
			double hight = sc.nextDouble();
			double BMI = weight/(hight*hight);
			if(BMI>18.5&&BMI<23.9) {
				System.out.println("Normal");
			}
			else
				System.out.println("Abnormal");
		}

	}

}

//https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751?tpId=107&&tqId=33318&rp=1&ru=/ta/beginner-programmers&qru=/ta/beginner-programmers/question-ranking
8.

import java.util.Scanner;

public class Main8 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		while (sc.hasNext()) {
			double price = sc.nextDouble();
			int mDate = sc.nextInt();
			int dDate = sc.nextInt();
			int free = sc.nextInt();
			if (dDate == 11) {
				if (free == 1) {
					price = price * 0.7 - 50;
				} else {
					price = price * 0.7;
				}
			} else {
				if (free == 1) {
					price = price * 0.8 - 50;
				} else {

					price = price * 0.8;
				}
			}
			if(price>0) {
				System.out.printf("%.2f",price);
			}
			else {
				System.out.println("0.00");
			}

		}
	}

}

本文地址：https://blog.csdn.net/qq_45874107/article/details/112862624