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x, d, h, m = map(int, input().split())
MIN = 1
H = 60 * MIN
DAY = 24 * H
start = m * MIN + h * H + d * DAY
end = (x + 24) * DAY
if x == 5:
    end += DAY
    if d < 29 or (d == 29 and h <= 2):
        end -= 60
time = end - start
print(time)