n = int(input())

c = {}
for i in range(n):
    x = input().count('^')
    if not x in c:
        c[x] = 1
    else:
        c[x] += 1

y = max(c.values())

l = []
for i in c:
    if c[i] == y:
        l.append(i)
print(max(l))