Exponentiation

Description

Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many computer systems.

This problem requires that you write a program to compute the exact value of Rn where R is a real number ( 0.0 < R < 99.999) and n is an integer such that $0 < n \le 25$.

Input

The input will consist of a set of pairs of values for R and n. The R value will occupy columns 1 through 6, and the n value will be in columns 8 and 9.

Output

The output will consist of one line for each line of input giving the exact value of Rn. Leading zeros and insignificant trailing zeros should be suppressed in the output.

Sample Input

95.123 12
0.4321 20
5.1234 15
6.7592  9
98.999 10
1.0100 12

Sample Output

548815620517731830194541.899025343415715973535967221869852721
.00000005148554641076956121994511276767154838481760200726351203835429763013462401
43992025569.928573701266488041146654993318703707511666295476720493953024
29448126.764121021618164430206909037173276672
90429072743629540498.107596019456651774561044010001
1.126825030131969720661201

HINT

#include<iostream>
#include<string.h>
using namespace std;
int main()
{
	char str[1000],a[1000],a1[1000];
	int c;
	int n,i,j,k,t,x,num,t1,t2,y,y1,y2;
	while(cin>>str>>n)
	{
	
		x=0;num=0;
		t=strlen(str);
		for(i=0;i<t;i++)
		{
			if(str[i]=='.')
			{
				num=t-1-i;
				i++;
			}
			a[x]=str[i];
			a1[x++]=str[i];
		}
		a[x]='\0';
		a1[x]='\0';
		num*=n;
		int x1=x;
		for(i=0;i<n-1;i++)
		{	
			int sum[1000]={0};
			t1=999;t2=999;
			for(j=x-1;j>=0;j--)
			{
				for(k=x1-1;k>=0;k--)
					sum[t1--]+=((a[j]-'0')*(a1[k]-'0'));
				t2--;
			    t1=t2;
			}
		    c=0;
			for(y=999;y>=0;y--)
			{
				sum[y]+=c;
				c=0;
				if(sum[y]>9)
				{
					c=sum[y]/10;
					sum[y]=sum[y]%10;
				}
			}
			for(y1=0;y1<1000;y1++)
			{
				if(sum[y1]!=0)
					break;
			}
			x1=0;
			for(y2=y1;y2<1000;y2++)
				a1[x1++]=sum[y2]+'0';
			a1[x1]='\0';
		}
		if(num==0)
			cout<<a1<<endl;
		else
		{
			t=strlen(a1);
			if(a1[t-1]=='0')//若(2.0, 2)則輸出4而不是4.00,多餘的零去掉
			{
				for(i=t-1;i>=0;i--)
				{
					if(a1[i]!='0')
						break;
					num--;//小數點的位數
				}
				t=i+1;
			}
			for(i=0;i<t-num;i++)
				cout<<a1[i];//輸出小數點之前的
			cout<<".";
			while(num>t-i)//若整數部分爲0,小數部分不夠填補小數點後的位數0
			{
				cout<<"0";
				num--;
			}
			for(j=i;j<t;j++)
				cout<<a1[j];//輸出小數點後的
			cout<<endl;
		}
	}
	return 0;
}



 

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