import sys
import math


def stopExecution():
    sys.exit()


noRootsMessage = "No roots"
oneRootMessage = "One root:"
twoRootsMessage = "Two roots:"

inputLine = input().strip().split(' ')

if not inputLine or len(inputLine) != 3:
    stopExecution()
try:
    a = int(inputLine[0])
    b = int(inputLine[1])
    c = int(inputLine[2])
except ValueError:
    stopExecution()

if a == 0:
    stopExecution()

D = b ** 2 - 4 * a * c

if D < 0:
    print(noRootsMessage)
    stopExecution()

if D == 0:
    x = -b / (2 * a)
    print(oneRootMessage, int(x))
    stopExecution()

x1 = (-b + math.sqrt(D)) / (2 * a)
x2 = (-b - math.sqrt(D)) / (2 * a)

print(twoRootsMessage, int(min(x1, x2)), int(max(x1, x2)))

import sys


def stopExecution():
    sys.exit()


n = input().strip()

if not n or len(n) != 3:
    stopExecution()

third = n[0]
second = n[1]
first = n[2]

if not third.isdigit() or not second.isdigit() or not first.isdigit():
    stopExecution()

print(int(first) * int(second) * int(third))

import sys

notFoundMessage = "Not Found"


def stopExecution():
    print(notFoundMessage)
    sys.exit()


n = input()
realNumbersLine = input()

if not realNumbersLine or not n:
    stopExecution()

sumOfPositiveNumbers = 0
countOfPositiveNumbers = 0

for num in realNumbersLine.strip().split(' '):
    if float(num) > 0:
        sumOfPositiveNumbers += float(num)
        countOfPositiveNumbers += 1

if countOfPositiveNumbers == 0:
    stopExecution()

print(str(round(sumOfPositiveNumbers / countOfPositiveNumbers, 2)))