26 через 1

data = open("26_21719.txt").readlines()
n = int(data[0])
a = []
for e in data[1:]:
    a.append(tuple(map(int, e.split())))
answ = 0
best_student = -1
flag = 1 #длина текущ последовательности
a.sort()
for i in range(1, n):
    if a[i][0] == a[i - 1][0]:
        if a[i][1] - a[i - 1][1] == 2:
            flag += 1
        elif a[i][1] != a[i - 1][1]:
            if answ < flag:
                answ = flag
                best_student = a[i][0]
            flag = 1
    else:
        flag = 1
print(best_student, answ)