Merge pull request #1982 from alexprudhomme/0496-next-greater-element-i.cs

Create: 0496-next-greater-element-i.cs

Author: tahsintunan

csharp/0496-next-greater-element-i.cs

@@ -0,0 +1,20 @@
+public class Solution {
+    public int[] NextGreaterElement(int[] nums1, int[] nums2) {
+        
+        Dictionary<int,int> dic = new Dictionary<int,int>();
+        Stack<int> stack = new Stack<int>();
+        foreach(var num in nums2)
+        {
+            while(stack.Count > 0 && num > stack.Peek())
+                dic.Add(stack.Pop(),num);
+            
+            stack.Push(num);
+        }
+        
+        int[] res = new int[nums1.Length];
+        for(int i = 0; i < nums1.Length; i++)
+            res[i] = dic.ContainsKey(nums1[i])? dic[nums1[i]] : -1;
+        
+        return res;
+    }
+}