Create 2894. Divisible and Non-divisible Sums Difference

Author: Chayandas07

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);
+    }
+};