Merge pull request #37 from nirmalnishant645/problem2

Number of days between two dates

1360-Number-of-Days-Between-Two-Days.py

@@ -0,0 +1,52 @@
+'''
+Write a program to count the number of days between two dates.
+
+The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples.
+
+ 
+
+Example 1:
+
+Input: date1 = "2019-06-29", date2 = "2019-06-30"
+Output: 1
+Example 2:
+
+Input: date1 = "2020-01-15", date2 = "2019-12-31"
+Output: 15
+ 
+
+Constraints:
+
+The given dates are valid dates between the years 1971 and 2100.
+'''
+class Solution:
+    def daysBetweenDates(self, date1: str, date2: str) -> int:
+        day1, month1, year1 = self.date_format(date1)
+        day2, month2, year2 = self.date_format(date2)
+
+        days1, days2 = self.count_Days(day1, month1, year1), self.count_Days(day2, month2, year2)
+
+        return days2 - days1 if days2 >= days1 else days1 - days2
+
+    def date_format(self, date):
+        date = date.split('-')
+        yyyy, mm, dd = map(int, date)
+        return dd, mm, yyyy
+
+    def count_Days(self, day, month, year):
+        months = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+        count = 0
+
+        for i in range(1970, year):
+            if (i % 100 and not i % 4) or not i % 400:
+                count += 366
+            else:
+                count += 365
+
+        for i in range(month - 1):
+            count += months[i]
+
+        if ((year % 100 and not year % 4) or not year % 400) and (month > 2 or (month == 2 and day == 29)):
+            count += 1
+
+        return count + day