17 (пара -- два соседних)

#https://inf-ege.sdamgia.ru/problem?id=37336
data = open('17.txt').readlines()
cnt = 0
mx = -10000000
for i in range(len(data) - 1):
    a = int(data[i])
    b = int(data[i + 1])
    if (a % 3 == 0) or (b % 3 == 0):
        cnt += 1
        mx = max(mx, a + b)
print(cnt, mx)