source_code: import java.util.Arrays;
  import java.util.Scanner;
  
  public class A {
  
      void run(){
          Scanner sc = new Scanner(System.in);
          int n = sc.nextInt();
          int[] a = new int[n];
          boolean dif = false;
          for(int i=0;i<n;i++)a[i]=sc.nextInt();
          Arrays.sort(a);
          if(n==1){
              System.out.println(a[0]==1?2:1);return;
          }
          int[] m = new int[n];
          for(int i=1;i<n;i++)if(a[i]!=a[i-1])dif=true;
          m[0] = 1;
          for(int i=1;i<n;i++)m[i]=a[i-1];
          if(!dif&&a[0]==1)m[n-1]++;
          
          for(int i=0;i<n;i++)System.out.print(m[i]+(i==n-1?"\n":" "));
      }
      
      public static void main(String[] args) {
          new A().run();
      }
  }