import java.util.Scanner;
public class WhileLoop{
public static void main(String[]args){
Scanner input=new Scanner(System.in);

int peopleEntered=0;
int count=0;
int tablesReserved=0;
int reservation=0;

System.out.print("How many people in your party? ");
peopleEntered=input.nextInt();
++reservation;
++count;
System.out.println(reservation + " reservations");
if(peopleEntered ==1){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==2){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==3){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==4){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered == 5){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 6){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 7){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 8){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 9){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 10){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 11){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 12){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 13){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 14){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 15){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 16){
  tablesReserved =tablesReserved+4;
}
System.out.println(tablesReserved + " tables used");

while(tablesReserved < 20){
  System.out.print("How many people in your party? ");
  peopleEntered=input.nextInt();  
  ++reservation;
System.out.println(reservation + " reservations");

if(peopleEntered ==1){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==2){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==3){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered ==4){
  tablesReserved = tablesReserved+1;
}else if(peopleEntered == 5){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 6){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 7){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 8){
  tablesReserved =tablesReserved+2;
}else if(peopleEntered == 9){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 10){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 11){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 12){
  tablesReserved =tablesReserved+3;
}else if(peopleEntered == 13){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 14){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 15){
  tablesReserved =tablesReserved+4;
}else if(peopleEntered == 16){
  tablesReserved =tablesReserved+4;
}

  ++count;
  System.out.println(tablesReserved + " tables used");

}  


System.out.println("Sorry we are full! No more reservations");
System.out.print("we had "+ count + " groups");
  }
}