1140

// include file
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cctype>
#include <ctime>

#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <bitset>

#include <algorithm>
#include <string>
#include <vector>
#include <queue>
#include <set>
#include <list>
#include <functional>

using namespace std;

// typedef
typedef __int64 LL;

// 
#define read freopen("in.txt","r",stdin)
#define write freopen("out.txt","w",stdout)

#define Z(a,b) ((a)<<(b))
#define Y(a,b) ((a)>>(b))

const double eps = 1e-6;
const double INFf = 1e100;
const int INFi = 1000000000;
const LL INFll = (LL)1<<62;
const double Pi = acos(-1.0);

template<class T> inline T sqr(T a){return a*a;}
template<class T> inline T TMAX(T x,T y)
{
	if(x>y) return x;
	return y;
}
template<class T> inline T TMIN(T x,T y)
{
	if(x<y) return x;
	return y;
}
template<class T> inline T MMAX(T x,T y,T z)
{
	return TMAX(TMAX(x,y),z);
}
template<class T> inline T MMIN(T x,T y,T z)
{
	return TMIN(TMIN(x,y),z);
}
template<class T> inline void SWAP(T &x,T &y)
{
	T t = x;
	x = y;
	y = t;
}


// code begin
int s,x;
int rm[1001];
int stk[1001],top;
int main()
{
	read;
	write;
	while(scanf("%d %d",&s,&x)==2)
	{
		if(s+x==0) break;
		memset(rm,0,sizeof(rm));
		s%=x;
		top = 0;
		int cnt = 0,f = 0;	
		rm[s] = ++cnt;
		while(1)
		{
			s*=10;
			stk[top++] = s/x;
			s%=x;
			if(s==0) 
			{
				break;
			}
			if(rm[s]) 
			{
				f = ++cnt-rm[s];
				break;
			}
			rm[s] = ++cnt;
		}
		printf(".");
		cnt = 1;
		for(int i=0;i<top;i++,cnt++)
		{
			if(cnt%50==0) printf("\n");
			printf("%d",stk[i]);
		}
		printf("\n");
		if(f)
			printf("The last %d digits repeat forever.\n",f);
		else
			printf("This expansion terminates.\n");
	}
	return 0;
}
posted @ 2011-04-30 21:37  AC2012  阅读(209)  评论(0编辑  收藏  举报