From db502fbd4e167ec53c314f7a1a778922dc3d7e81 Mon Sep 17 00:00:00 2001
From: chayan das <dasshuvo817@gmail.com>
Date: Tue, 27 May 2025 14:32:57 +0530
Subject: [PATCH] Create 2894. Divisible and Non-divisible Sums Difference

---
 2894. Divisible and Non-divisible Sums Difference | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 2894. Divisible and Non-divisible Sums Difference

diff --git a/2894. Divisible and Non-divisible Sums Difference b/2894. Divisible and Non-divisible Sums Difference
new file mode 100644
index 0000000..5bf310e
--- /dev/null
+++ b/2894. Divisible and Non-divisible Sums Difference	
@@ -0,0 +1,11 @@
+class Solution {
+public:
+    int differenceOfSums(int n, int m) {
+        // we need to find S(n)-2*(divisibles)
+
+        // no of divisibles
+        int x=n/m;
+
+        return (n*(n+1))/2-2*m*((x*(x+1))/2);
+    }
+};