public static void sortStack(Stack<Integer> stack){
     Stack<Integer> help = new Stack<>();
         while(!stack.isEmpty()){
             Integer curr = stack.pop();
             while(!help.isEmpty()&&help.peek()<curr){
                 stack.push(help.pop());
             }
             help.push(curr);
         }

         while(!help.isEmpty()){
             stack.push(help.pop());
         }
     

 }