ZZULIOJ JAVA T1040-T1049

最新推荐文章于 2023-04-13 21:02:20 发布

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本文提供了一系列Java编程挑战，涉及数学序列求和、数组排序与统计、奇数乘积计算、对数计算、阶乘计算、平方与立方求和等，旨在提升编程技能。

ZZULIOJ JAVA T1040-T1049

T1040

import java.util.Scanner;

public class T1040 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		in.close();
		double sum =0.0;
		int t =1;
		for(int i=1; i<=x;i++) {
			
			sum += 1.0/t;
			t  +=2;
		}
		System.out.printf("%.2f", sum);

	}

}

T1041

import java.util.Scanner;

public class T1041 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		in.close();
		double sum =0.0;
		int t =1;
		int f =1;
		for(int i=1; i<=x;i++) {
			
			sum += 1.0*f/t;
			f = -f;
			t  +=2;
		}
		System.out.printf("%.2f", sum);

	}

}

T1042

import java.util.Scanner;

public class T1042 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		in.close();
		double sum =0.0;
		double d = 1;
		double t =1;
		double f =1;
		for(int i=1; i<=x;i++) {
			
			sum += d*f/t;
			d++;
			f = -f;
			t  +=2;
		}
		System.out.printf("%.3f", sum);


	}

}

T1043

import java.util.Scanner;

public class T1043 {


	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int a[] = new int[x];
		
		for(int i =0;i<x;i++)
			a[i] = in.nextInt();
		for(int i=1;i<x;i++)
			for(int j =0;j<x-i;j++) {
				if(a[j]<a[j+1]) {
					int t = a[j+1];
				    a[j+1] =a[j];
				    a[j] =t;
				}
			    
					
			}
		in.close();
		System.out.println(a[0]);

	}

}

T1044

import java.util.Scanner;

public class T1044 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int a[] = new int[x];
		for(int i =0;i<x;i++)
			a[i] = in.nextInt();
		in.close();
		int t=0;
		for(int i=0;i<a.length;i++) {
			if(a[i]<60)
				t++;
		}
		System.out.printf("%.2f", t*1.0/x);
			

	}

}

T1045

import java.util.Scanner;

public class T1045 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int n[]  =new int[x];
		int a=0 , b=0 ,c=0;
		for(int i=0; i<n.length;i++) {
			n[i] = in.nextInt();
			
			if(n[i]<0)
				a++;
			else if(n[i]==0)
				b++;
			else 
				c++;
				
		}
		in.close();
		System.out.println(a+" "+b+" "+c);

	}

}

T1046

import java.util.Scanner;

public class T1046 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int n[]  =new int[x];
		int a =1;
		for(int i=0; i<n.length;i++) {
			n[i] = in.nextInt();
			
			if(n[i]%2==1)
				a*=n[i];
		}
		in.close();
		System.out.println(a);

	}

}

T1047

import java.util.Scanner;

public class T1047 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int y = in.nextInt();
		in.close();
		for(int i = x;i<=y;i++) {
			System.out.printf("%4d%8.4f\n",i,Math.log(i) );
		}

	}

}

T1048

import java.util.Scanner;

public class T1048 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		long  t =1;
	
		in.close();
		for(int i = 1;i<=x;i++) {
			t = t*i;
			System.out.printf("%-4d%-20d\n",i,t );
		}

	}

}

T1049

import java.util.Scanner;

public class T1049 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int y = in.nextInt();	
		int b=0,c=0;
		for(int i = x;i<=y;i++) {
			
			if(i%2==0)
				b+=Math.pow(i, 2);
			else
				c+=Math.pow(i, 3);
		}
		in.close();
		System.out.println(b+" "+c);

	}

}