leetcode new problems

leetcode/lc27.cpp

@@ -0,0 +1,14 @@
+class Solution{
+    public: 
+        int removeELement(vector<int>& nums, int val){
+            int k = 0;
+            for(int i = 0;i<nums.size();i++){
+                if(nums[i]!=val)
+                    nums[k++] = nums[i];
+                
+            }
+            return k;
+        }
+};
+// i-> scans every element
+// k-> stores only valid(!=val) elements