CSU 1265:dice (Math AH)

Title Link: http://acm.csu.edu.cn/OnlineJudge/problem.php?id=1265

Description

An example of a traditional dice are a rounded cube with each of its six faces showing a different number of dots from 1 t o 6. When thrown or rolled, the dice comes to rest showing on its upper surface a random integral points from one to six, each Value being equally likely.

----Wikipedia

Now we have a dices which both with six faces. Can you tell us the probability, the sum points of the dices equals S when we thrown?

Input

There is an integer t (1 <= T <= one) in the first line, means there was T test cases in total.

For each test case, there was only a line with one integer S (2 <= s <=), which has the same meaning as above.

Output

For each test case, you should print the probability, the sum points of both dices equals S when we thrown. The answer should is in one line and rounding to 6 decimals.

Print a blank line after each test case.

Sample Input

223

Sample Output

0.0277780.055556

HINT

Source

Seventh session of university student Program design Competition-warm-up

The code is as follows:

#include <cstdio>int main () {    int t;    int sum;    scanf ("%d", &t);    while (t--)    {        scanf ("%d", &sum);        int cont=0;        for (int i = 1, i <= 6; i++)        {for            (int j = 1; J <= 6; j + +)            {                if (i+j==sum)                    cont++;            }        }        printf ("%.6lf\n\n", cont/36.0);    }    return 0;}

CSU 1265:dice (Math AH)