count = []
for _ in range(int(input())):
    eye = 0
    for s in input():
        if s == '^':
            eye += 1
    if eye >= len(count):
        for _ in range(eye - len(count) + 1):
            count.append(0)
    count[eye] += 1

for i in range(len(count) - 1, -1, -1):
    if max(count) == count[i]:
        print(i)
        break