import sequtils,strutils,math
type
    kakaku = tuple[t : float64, n : float64]
var
    k = stdin.readline.parseInt
    a,b,t,n,p,q : float64
    ai,bi : int
    M,m : float64
    M2,m2,n2,index : int
    s : string
    kTable = newSeqWith(11,newSeqWith(11,newSeq[kakaku](0)))
    flag : int
for i in 1..k:
    (a,b,t) = stdin.readline.split.map(parseFloat)
    (ai,bi) = (a.int,b.int)
    flag = 1
    if b == 0:
        M = pow(t, 1 / a)
        m = M
        flag = 0
    elif a == 0:
        M = exp(pow(t, 1 / b))
        m = M
        flag = 0
    elif kTable[ai][bi].len == 0 or t > kTable[ai][bi][^1].t:
        flag = 2
        q = a / b * pow(t, 1 / b)
        n = 0.5
        while true:
            p = pow(n, a / b)
            if p * ln(p) <= q:
                m = n
                n *= 1.5
            else:
                break
        M = n
    else:
        if t < kTable[ai][bi][0].t:
            M = kTable[ai][bi][0].n
            m = 0.0
            index = 0
        else:
            M2 = kTable[ai][bi].len
            m2 = 0
            while M2 - m2 > 1:
                n2 = (M2 + m2) div 2
                if abs(kTable[ai][bi][n2].t - t) < 0.000_01:
                    M2 = n2
                    m2 = n2
                elif kTable[ai][bi][n2].t < t:
                    m2 = n2
                else:
                    M2 = n2
            M = kTable[ai][bi][M2].n
            m = kTable[ai][bi][m2].n
            index = M2
        q = a / b * pow(t, 1 / b)
    while M - m > 0.000_000_001:
        n = (M + m) / 2.0
        p = pow(n, a / b)
        if p * ln(p) <= q:
            m = n
        else:
            M = n
    if flag == 1:
        kTable[ai][bi].insert((t, M),index)
    elif flag == 2:
        kTable[ai][bi].add((t,M))
    s = $M
    echo s[0..11]