hdu A simple problem

A simple problem

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2488    Accepted Submission(s): 855

Problem Description

Zty很痴迷数学问题.。一天，yifenfei出了个数学题想难倒他，让他回答1 / n。但Zty却回答不了^_^. 请大家编程帮助他.

 

 

Input

第一行整数T，表示测试组数。后面T行，每行一个整数 n (1<=|n|<=10^5).

 

 

Output

输出1/n. (是循环小数的,只输出第一个循环节).

 

 

Sample Input

4 2 3 7 168

 

 

Sample Output

0.5 0.3 0.142857 0.005952380

#include<iostream>

#include<cstdio>

#include<cstring>

using namespace std;

#define N 100001

int a[N];

int main(){

	int k,n,T;

	scanf("%d",&T);

	while(T--){

		scanf("%d",&n);

		if(n<0){printf("-");n=-n;}

		if(n==1){printf("1");continue;}

		printf("0.");

		memset(a,0,sizeof(a));

		a[0]=1;

		k=1;

		while(!a[k]){//余数第一次出现，没有出现循环

			    a[k]=1;

				k*=10;

				printf("%d",k/n);

				k%=n;

		}

		printf("\n");

	}

return 0;

}