mirror of
https://gitcode.com/Zengtudor/alg2025.git
synced 2025-11-09 16:12:21 +00:00
21 lines
414 B
Python
21 lines
414 B
Python
def isr(n:int)->bool:
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if n%4==0:
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return True
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return False
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def r(a:int,b:int)->int:
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ret = 0
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for i in range(a,b+1):
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if isr(i):
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ret+=1
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return ret
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md = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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bf = 400*365+r(1,400)
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d1600 = 4*bf
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d1582 = d1600 - 19*365 - 5
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ac = d1582 + sum(md[1:10])+4
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d4713 = 4800//400*bf - r(4713,4800) - (4800-4713)*365
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print(d4713 + ac) |