Create Divisible and Non-divisible Sums Difference.py

erjan · web-flow · commit e4f09f43a11a · 2025-05-27T11:18:11.000+05:00
diff --git a/Divisible and Non-divisible Sums Difference.py b/Divisible and Non-divisible Sums Difference.py
@@ -0,0 +1,24 @@
+'''
+You are given positive integers n and m.
+
+Define two integers as follows:
+
+num1: The sum of all integers in the range [1, n] (both inclusive) that are not divisible by m.
+num2: The sum of all integers in the range [1, n] (both inclusive) that are divisible by m.
+Return the integer num1 - num2.
+'''
+
+-----------------------------------------------------------------------
+
+
+class Solution:
+    def differenceOfSums(self, n: int, m: int) -> int:
+        n1 = sum(i for i in range(1,n+1) if i%m !=0)
+        n2 = sum(i for i in range(1,n+1) if i%m ==0)
+        return n1-n2
+
+-----------------------------------------------------------------------
+
+class Solution:
+    def differenceOfSums(self, n: int, m: int) -> int:
+        return n*(n+1)//2-m*(n//m)*(n//m+1)
