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from datetime import datetime

ENDS = [
    datetime(2026, 3, 24, 23, 59, 59),
    datetime(2026, 3, 25, 23, 59, 59),
    datetime(2026, 3, 26, 23, 59, 59),
    datetime(2026, 3, 27, 23, 59, 59),
    datetime(2026, 3, 29, 23, 59, 59),
]

r, d, h, m = map(int, input().split())
start = datetime(2026, 3, d, h, m)
diff = (ENDS[r - 1] - start).total_seconds()
if r == 5 and diff >= 79200:
    diff -= 3600
print(int((diff + 1) / 60))