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import sys

from datetime import datetime


input = sys.stdin.read().strip()

round, day, hour, minute = [int(t) for t in input.split()]

limits = [
    None,
    datetime(2026, 3, 25),
    datetime(2026, 3, 26),
    datetime(2026, 3, 27),
    datetime(2026, 3, 28),
    datetime(2026, 3, 30),
]

start = datetime(2026, 3, day, hour, minute)

end = limits[round]
ret = (end - start).total_seconds() / 60
ret = int(ret)

if round == 5 and start < datetime(2026, 3, 29, 3):
    ret -= 60

print(ret)