Problem B also added

Author: 0xsanchit

Codeforces_Contests/Round_638_Div_2/B.cpp

@@ -0,0 +1,47 @@
+/**************************************************************************
+ *  $Id$
+ *  File:	
+ *
+ *  Purpose:	
+ *
+ *  Author:	Sanchit Gupta (CS19B071)
+ *
+ *  Created:    
+ *
+ *  Last modified:  
+ *
+ *  Bugs:	
+ *
+ *  Change Log:	
+ *
+ * While(!(succeed==try());
+ **************************************************************************/
+#include <bits/stdc++.h>
+using namespace std;
+
+int main(){
+  int t; cin>>t;
+  while (t--)
+   {
+       int n,k;
+  cin>>n,k;
+  set<int>s;
+  for (int i=0;i<n;i++){
+    int a;
+    cin>>a;
+    s.insert(a);
+  }
+  if (s.size()>k){
+    cout<<-1<<endl;
+    return;
+  }
+  cout<<n*k<<endl;
+  for (int i=0;i<N;i++){
+    for (int b:s)
+      cout<<b<<' ';
+    for (int j=0;j<k-(int)s.size();j++)
+      cout<<1<<' ';
+  }
+  cout<<endl;
+   }
+}