x = int(input('введите количество сотрудников'))
if 2 <= x < 1000:
    x == x - 1
    list = [300.50, 190, 450.70, 120.10, 700]
    def listSum(numList):
        y = 0
        for z in numList:
            y = y + z
        return y
print(listSum([300.50, 190, 450.70, 120.10, 700])/x)