n=int(input())
def f(x):
    r=x
    l=0
    while r-l>0.0000001:
        mid=(r+l)/2
        if mid**2>x:
            r=mid
        else:
            l=mid
    return r
for _ in range(n):
    x=int(input())
    print(str(f(x))[0])