import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.Scanner;
import java.util.Stack;
import java.util.StringTokenizer;

/**
 * <b> Algorithm on Codeforces. Problem C div 2 </b> </br>
 * @author Huynh Quang Thao
 *
 */
public class Main {

	public static void main(String[] args) throws Exception {
		Main main = new Main();
		main.run();
	}

	public void run() throws Exception {
		 Scanner sc = null;
	     PrintWriter pr = null;

	     pr=new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
	     sc = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
	   //  sc = new Scanner(new File("input.txt"));

	     long n = sc.nextLong();
	     long sum = 0;
	     for (int i = 0; i < n; i++) {
	    	 sum += sc.nextLong();
	     }

	     if (sum % (n-1) == 0) System.out.println(sum / (n-1));
	     else System.out.println(sum / (n-1) + 1);

	     pr.close();
	     sc.close();

	}

	static class Team {
		int baloon;
		int rA;
		int rB;
		public Team(int baloon, int rA, int rB) {
			this.baloon = baloon;
			this.rA = rA;
			this.rB = rB;
		}
	}

	static class InputReader {
		public BufferedReader reader;

		public StringTokenizer tokenizer;

		public InputReader(InputStream stream) {
			reader = new BufferedReader(new InputStreamReader(stream));
			tokenizer = null;
		}

		public String next() {
			while (tokenizer == null || !tokenizer.hasMoreTokens()) {
				try {
					tokenizer = new StringTokenizer(reader.readLine());
				}
				catch (IOException e) {
					throw new RuntimeException(e);
				}
			}
			return tokenizer.nextToken();
		}

		public int nextInt() {
			return Integer.parseInt(next());
		}

		public double nextDouble() {
			return Double.parseDouble(next());
		}

		public float nextFloat() {
			return Float.parseFloat(next());
		}

		public long nextLong() {
			return Long.parseLong(next());
		}

		public BigInteger nextBigInteger() {
			return new BigInteger(next());
		}

	}
}