import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int[] x = new int[100005];
for(int i = 0;i < n;i ){
x[i] = sc.nextInt();
}
int l = 0, r= 1;
int ans = 1;
int flag = 0;
while(r < n){
for(int i = l; i < r ;i ){
if(x[i] == x[r]){
l = i+1;
flag = 1;
break;
}
}
if(flag == 0){
ans = Math.max(ans,r - l + 1);
}
flag = 0;
r++;
}
System.out.print(ans);
}
}