source_code: import java.io.BufferedReader;
  import java.io.InputStreamReader;
  import java.util.Arrays;
  import java.util.StringTokenizer;
  
  public class A135 {
  	public static void main(String[] args) throws Exception {
  		BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
  		int n = Integer.parseInt(r.readLine());
  
  		int[] ar = new int[n];
  		StringTokenizer st = new StringTokenizer(r.readLine());
  		for (int x = 0; x < n; x++) {
  			ar[x] = Integer.parseInt(st.nextToken());
  		}
  		Arrays.sort(ar);
  		if (n == 1) {
  
  			System.out.println(ar[0]==1?"2":"1");
  			return;
  		}
  		if (ar[n - 1] == 1) {
  			ar[n - 2] = 2;
  		}
  		System.out.print("1");
  		for (int x = 0; x < n - 1; x++) {
  			System.out.print(" " + ar[x]);
  		}
  		System.out.println();
  	}
  }
  