import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.Closeable;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.*;

public class Main implements Runnable {
    static ContestScanner in;
    static Writer out;
    public static void main(String[] args) {
        new Thread(null, new Main(), "", 16 * 1024 * 1024).start();
    }

    public void run() {
        Main main = new Main();
        try {
            in = new ContestScanner();
            out = new Writer();
            main.solve();
            out.close();
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    void solve() throws IOException {
        int n = in.nextInt();
        long[] a = new long[n];
        for (int i = 0; i < n; i++) {
            a[i] = in.nextLong();
        }
        System.out.println(solveE(a));
    }
    long brute(long[] a) {
        int n = a.length;
        int k = 0;
        long max;
        do {
            k++;
            max = 0;
            int mi = 0;
            for(int i = 0; i < n; i++) {
                if(a[i] > max) {
                    max = a[i];
                    mi = i;
                }
                a[i]++;
            }
            a[mi] -= n + 1;
        } while (max >= n);
        return k - 1;
    }

    long[] solve2(long k) {
        long[] a = new long[50];
        int n = a.length;
        for (int i = 0; i < n; i++) {
            a[i] = n - 1 + k / n;
        }
        for (int i = 0; i < k % n; i++) {
            a[i] += n + 1;
            for (int j = 0; j < n; j++) {
                a[j]--;
            }
        }
        return a;
    }

    long solveE(long[] a) {
        Arrays.sort(a);
        int n = a.length;
        long k = 0;
        for (int i = 0; i < n; i++) {
            long diff = (a[i] - a[0]) / (n + 1);
            a[i] -= diff * (n + 1);
            k += diff;
        }
        for (int i = 0; i < n; i++) {
            a[i] += k;
        }
        long ans = k;
        if(a[0] >= n) {
            ans += (a[0] - (n - 1)) * n;
            for (int i = n -1 ; i >= 0; i--) {
                a[i] -= (a[0] - (n - 1));
            }
        }

        return ans + brute(a);
    }
}


@SuppressWarnings("serial")
class MultiSet<T> extends HashMap<T, Integer>{
    @Override public Integer get(Object key){return containsKey(key)?super.get(key):0;}
    public void add(T key,int v){put(key,get(key)+v);}
    public void add(T key){put(key,get(key)+1);}
    public void sub(T key){final int v=get(key);if(v==1)remove(key);else put(key,v-1);}
    public MultiSet<T> merge(MultiSet<T> set)
    {MultiSet<T>s,l;if(this.size()<set.size()){s=this;l=set;}else{s=set;l=this;}
        for(Entry<T,Integer>e:s.entrySet())l.add(e.getKey(),e.getValue());return l;}
}

class Writer extends PrintWriter{
    public Writer(String filename)throws IOException
    {super(new BufferedWriter(new FileWriter(filename)));}
    public Writer()throws IOException{super(System.out);}
}
class ContestScanner implements Closeable{
    private BufferedReader in;private int c=-2;
    public ContestScanner()throws IOException
    {in=new BufferedReader(new InputStreamReader(System.in));}
    public ContestScanner(String filename)throws IOException
    {in=new BufferedReader(new InputStreamReader(new FileInputStream(filename)));}
    public String nextToken()throws IOException {
        StringBuilder sb=new StringBuilder();
        while((c=in.read())!=-1&&Character.isWhitespace(c));
        while(c!=-1&&!Character.isWhitespace(c)){sb.append((char)c);c=in.read();}
        return sb.toString();
    }
    public String readLine()throws IOException{
        StringBuilder sb=new StringBuilder();if(c==-2)c=in.read();
        while(c!=-1&&c!='\n'&&c!='\r'){sb.append((char)c);c=in.read();}
        return sb.toString();
    }
    public long nextLong()throws IOException,NumberFormatException
    {return Long.parseLong(nextToken());}
    public int nextInt()throws NumberFormatException,IOException
    {return(int)nextLong();}
    public double nextDouble()throws NumberFormatException,IOException
    {return Double.parseDouble(nextToken());}
    public void close() throws IOException {in.close();}
}

Measured memory_bytes: 23636