10931: 数学要好

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:1 Solved:0

Description

Input

t,ab,(1<=t<=233;1<=a,b<=10000,)

Output

fg(f),4"no"

Sample Input Copy

3
2 5
2 3
3 2

Sample Output Copy

0.5156
5.7778
29.2500