from math import gcd

def normalize_direction(x, y):
    if x == 0 and y == 0:
        return (0, 0)
    
    g = gcd(abs(x), abs(y))
    x //= g
    y //= g
    
    return (x, y)

with open('INPUT.TXT', 'r') as f:
    n = int(f.readline())
    targets = []
    for _ in range(n):
        x, y = map(int, f.readline().split())
        targets.append((x, y))

directions = {}
for x, y in targets:
    direction = normalize_direction(x, y)
    directions[direction] = directions.get(direction, 0) + 1

max_targets = max(directions.values())

with open('OUTPUT.TXT', 'w') as f:
    f.write(str(max_targets))