Create Tree2.cpp

Tree2.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+#include<algorithm>
+using namespace std;
+
+int main() {
+	// your code goes here
+	int t;
+	cin>>t;
+
+	while(t--){
+	    int n;
+	    cin>>n;
+	    int arr[n];
+
+	    for(int i=0;i<n;i++){
+	        int a;
+	        cin>>a;
+	        arr[i]=a;
+	    }
+
+	    sort(arr,arr+n);
+	    int count=0;
+	    for(int i=0;i<n-1;i++){
+	        if(arr[i]!=arr[i+1]){
+	            count++;
+	        }
+	    }
+