From 27bebc97c06c67a5c2eaaa142a3ff273ea19e0fc Mon Sep 17 00:00:00 2001
From: Zengtudor <Zengtudor@outlook.com>
Date: Mon, 22 Sep 2025 15:26:37 +0800
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实现日期相关计算功能，包括闰年判断和日期差计算
---
 src/9/22/P7075getd.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/9/22/P7075getd.py

diff --git a/src/9/22/P7075getd.py b/src/9/22/P7075getd.py
new file mode 100644
index 0000000..b40925b
--- /dev/null
+++ b/src/9/22/P7075getd.py
@@ -0,0 +1,21 @@
+def isr(n:int)->bool:
+    if n%4==0:
+        return True
+    return False
+
+def r(a:int,b:int)->int:
+    ret = 0
+    for i in range(a,b+1):
+        if isr(i):
+            ret+=1
+    return ret
+
+md = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+
+bf = 400*365+r(1,400)
+d1600 = 4*bf
+d1582 = d1600 - 19*365 - 5
+ac = d1582 + sum(md[1:10])+4
+d4713 = 4800//400*bf - r(4713,4800) - (4800-4713)*365
+
+print(d4713 + ac)
\ No newline at end of file