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x, d, h, m = [int (_) for _ in input().split()]

def to_minute_stamp(d, h, m):
    return d*24*60+h*60+m - int((d==29 and h > 2) or d>29)*60

print(to_minute_stamp(x+24+int(x==5), 0, 0)-to_minute_stamp(d, h, m))