HDU2522 A simple problem 【模拟】

A simple problem

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)

Total Submission(s): 3133    Accepted Submission(s): 1144

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
   
   
   
   

 

Author

yifenfei

 

Source

HDU 2008-10 Programming Contest 

#include <stdio.h>
#include <string.h>
#define maxn 100002

bool vis[maxn];

int main()
{
    int n, i, t, m;
    scanf("%d", &t);
    while(t--){
        scanf("%d", &n);
        if(n < 0){
            printf("-"); n = -n;
        }
        if(n == 1){
            printf("1\n"); continue;
        }        
        memset(vis, 0, sizeof(bool) * n);
        printf("0."); m = 1; vis[0] = 1;
        while(!vis[m]){
            vis[m] = 1; m *= 10;
            printf("%d", m / n);
            m %= n;
        }
        printf("\n");
    }
    return 0;
}