import math
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    a, b, c = MI()
    D = b ** 2 - 4 * a * c
    if D > 0:
        print(2)
        print((-b - math.sqrt(b ** 2 - 4 * a * c)) / a / 2)
        print((-b + math.sqrt(b ** 2 - 4 * a * c)) / a / 2)
    elif D==0:
        print(1)
        print(-b / a / 2)
    else:
        print(0)
main()