Solution of day 1 question on leetcode

solutions/day01/solution_cpp.cpp

@@ -0,0 +1,24 @@
+class Solution {
+public:
+    bool canArrange(vector<int>& arr, int k) {
+        int n = arr.size();
+
+        vector<int>result(k,0);
+
+        for(int i=0 ; i<n; i++){
+            int rem = ((arr[i] % k) + k) % k;
+
+            result[rem]++;
+        }
+
+        if(result[0] % 2 != 0)      return false;
+
+        for(int i = 1; i<= k/2 ; i++){
+            if(result[i] != result[k-i]){
+                return false;
+            }
+        }
+
+        return true;;
+    }
+};