Задание 27 #14

maximum = 0
max_summ = 28
n = int(input())
summs = [0] * max_summ
for i in range(n):
    summ = 0
    number = int(input())
    while number > 0:
        summ += number % 10
        number //= 10
    summs[summ] += 1
for i in range(max_summ):
    if summs[i] > maximum:
        maximum = summs[i]
        minimum = i
print(minimum)