Java高精度练习 Hdu 1002+1042+1047+1212+1316+1715+1753+2054

小咪咪 2022-08-25 01:28 47阅读 0赞

**Hdu 1002 A + B Problem II**

import java.math.BigInteger;
    import java.util.Scanner;
    
    public class Main
    {
        public static void main (String[] args)
        {
            Scanner cin = new Scanner(System.in);
            int T=cin.nextInt();
            for (int Cas=1;Cas<=T;Cas++)
            {
                BigInteger a,b;  
                a=cin.nextBigInteger();  
                b=cin.nextBigInteger();  
                System.out.println("Case "+Cas+":");  
                System.out.println(a+" + "+b+" = "+a.add(b));
                if (Cas<T)  
                    System.out.println(); 
            }
            cin .close();
        }
    }

**Hdu 1042 N!**

import java.math.*;
    import java.util.*;
    
    public class Main
    {
        public static void main (String[] args)
        {
            Scanner cin = new Scanner(System.in);
            while (cin.hasNext())
            {
                int n=cin.nextInt();
                if (n==0) System.out.println("1");
                else
                {
                    BigInteger ans=BigInteger.ONE;
                    for (int i=1;i<=n;i++)
                    {
                        ans=ans.multiply(BigInteger.valueOf(i));
                    }
                    System.out.println(ans);
                }
                
            }
            cin .close();//输入关闭
        }
    }

**Hdu 1047 Integer Inquiry**

import java.math.BigInteger;
    import java.util.Scanner;
    
    public class Main
    {
        public static void main (String[] args)
        {
            Scanner cin = new Scanner(System.in);
            int T=cin.nextInt();
            for (int Cas=1;Cas<=T;Cas++)
            {
                boolean flag=true;
                BigInteger ans=BigInteger.ZERO,tmp;
                while (flag)
                {
                    tmp=cin.nextBigInteger();  
                    if (tmp.compareTo(BigInteger.valueOf(0))==0)
                        flag=false;  
                    ans=ans.add(tmp);  
                }  
                System.out.println(ans);  
                if (Cas<T)
                    System.out.println();
            }
            cin .close();
        }
    }

**Hdu 1212 Big Number**

import java.util.Scanner;
    import java.math.*;
    public class Main
    {
    	public static void main (String args[])
    	{
    		Scanner cin=new Scanner (System.in);
    		while (cin.hasNext())
    		{
    			BigInteger a=cin.nextBigInteger();
    			BigInteger b=cin.nextBigInteger();
    			System.out.println(a.mod(b));
    		}
    	}
    }

**Hdu 1316 How Many Fibs?**

import java.util.Scanner;
    import java.math.*;
    
    public class Main
    {
    	public static void main (String args[])
    	{
    		Scanner cin=new Scanner (System.in);
    		BigInteger []fib=new BigInteger [500];
    		fib[0]=BigInteger.valueOf(1);
    		fib[1]=BigInteger.valueOf(1);
    		for (int i=2;i<500;i++)
    			fib[i]=fib[i-1].add(fib[i-2]);
    		BigInteger a,b,zero;
    		zero=BigInteger.valueOf(0);
    		while (cin.hasNext())
    		{
    			a=cin.nextBigInteger();
    			b=cin.nextBigInteger();
    			if (a.compareTo(zero)==0 && b.compareTo(zero)==0)
    				break;
    			int ans=0;
    			for (int i=1;i<500;i++)
    				if (fib[i].compareTo(a)>=0 && fib[i].compareTo(b)<=0)
    					ans++;
    			System.out.println(ans);
    		}
    	}
    }

**Hdu 1715 大菲波数**

**Hdu 1753 大明A+B**

import java.util.Scanner;
    import java.math.*;
    
    public class Main
    {
    	public static void main (String args[])
    	{
    		Scanner cin=new Scanner (System.in);
    		while (cin.hasNext())
    		{
    			BigDecimal a=cin.nextBigDecimal();
    			BigDecimal b=cin.nextBigDecimal();
    			a=a.add(b);
    			a=a.stripTrailingZeros();  //去尾0
    			String pre=a.toPlainString();  //转化成字符串，避免科学计数法
    			System.out.println(pre);
    		}
    	}
    }

**Hdu 2054 A == B ?**

import java.util.Scanner;
    import java.math.*;
    
    public class Main
    {
        public static void main (String args[])
        {
            Scanner cin=new Scanner (System.in);
            BigDecimal a,b;
            while (cin.hasNext())
            {
                a=cin.nextBigDecimal();
                b=cin.nextBigDecimal();
                if (b.compareTo(a)==0)
                    System.out.println("YES");
                else
                    System.out.println("NO");
            }
        }
    }