import collections

sum = 2020
eingabe = []

with open('./input.txt') as f:
    for line in f:
        eingabe.append(int(line))
        
# print(eingabe)

sumtable = []
        
for summ1 in eingabe:
    for summ2 in eingabe:
        suche = 2020 - (summ1+summ2) 
        if suche in eingabe:
            if suche not in sumtable:
                sumtable.append(suche)
                print('{} + {} + {} = {}'.format(summ1, summ2, suche, int(summ1)+int(summ2)+int(suche)))
                print('found')
    

print(eingabe, len(eingabe))
print(sumtable)

print('{} * {} * {} = {}'.format(sumtable[0], sumtable[1], sumtable[2], sumtable[0]*sumtable[1]*sumtable[2]))