class Tetel:
    def __init__(self, f):
        global x
        f_in = open(f)
        x = []

        for line in f_in:
            x += [int(line)]

    def szamlal(self, fuggveny):
        betha_list = []
        for n in x:
        	if fuggveny(n):
        		betha_list += [1]
        summary = sum(betha_list)
        return summary

    def osszegez(self):
        summary2 = sum(x)
        return summary2

    def maxker(self):
    	mk = max(x)
    	return mk

    def feltmaxker(self, fuggveny):
        max_list = []
        for n in x:
        	if fuggveny(n):
        		max_list += [n]
        fmk = max(max_list)
        return fmk