using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution {

    static long longestSequence(long[] a) {
        int moves = 0;
        int numOfSticks = 1;
        int oNumOfPieces = 1;
        int numOfPieces = oNumOfPieces;
        
        if(numOfPieces == 1){
            
        }
        return moves;
    }

    static void Main(String[] args) {
        int n = Convert.ToInt32(Console.ReadLine());
        string[] a_temp = Console.ReadLine().Split(' ');
        long[] a = Array.ConvertAll(a_temp,Int64.Parse);
        long result = longestSequence(a);
        Console.WriteLine(result);
    }
}