from collections import Counter, defaultdict, deque
from sys import stdin, stdout
input = lambda: stdin.readline().rstrip()
write = stdout.write

def main():
    N = int(input())
    S = stdin.read().splitlines()

    counter = Counter(S)
    topn = counter.most_common()
    maxn, eyes = 0, 0
    for s, i in topn:
        if maxn <= i:
            maxn = i
            eyes = max(eyes, s.count('^'))
    print(eyes)

main()