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from datetime import datetime

r = {1:datetime(2026,3,25,0,0)
     ,2:datetime(2026,3,26,0,0)
     ,3:datetime(2026,3,27,0,0)
     ,4:datetime(2026,3,28,0,0)
     ,5:datetime(2026,3,30,0,0)
    }

x, d, h, m = [int(x) for x in input().split(" ")]
a = datetime(2026, 3, d, h, m)

ans = int((r[x] - a).total_seconds())//60
if x == 5:
    if a < datetime(2026,3,29,2,0):
        ans -= 60
print(ans)