Problem: Today, Mezo is playing a game. Zoma, a character in that game, is initially at position x = 0. Mezo starts sending n commands to Zoma. There are two possible commands:

  * 'L' (Left) sets the position x: =x - 1; 
  * 'R' (Right) sets the position x: =x + 1. 



Unfortunately, Mezo's controller malfunctions sometimes. Some commands are sent successfully and some are ignored. If the command is ignored then the position x doesn't change and Mezo simply proceeds to the next command.

For example, if Mezo sends commands "LRLR", then here are some possible outcomes (underlined commands are sent successfully): 

  * "LRLR" — Zoma moves to the left, to the right, to the left again and to the right for the final time, ending up at position 0; 
  * "LRLR" — Zoma recieves no commands, doesn't move at all and ends up at position 0 as well; 
  * "LRLR" — Zoma moves to the left, then to the left again and ends up in position -2. 



Mezo doesn't know which commands will be sent successfully beforehand. Thus, he wants to know how many different positions may Zoma end up at.

Input

The first line contains n (1 ≤ n ≤ 10^5) — the number of commands Mezo sends.

The second line contains a string s of n commands, each either 'L' (Left) or 'R' (Right).

Output

Print one integer — the number of different positions Zoma may end up at.

Example

Input


4
LRLR


Output


5

Note

In the example, Zoma may end up anywhere between -2 and 2.

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int count=1,n=sc.nextInt(),l=0,r=0;
        int ans=0;
        String s=sc.next();
        char[] c=new char[n];
        c=s.toCharArray();
        for(int i=0;i<s.length();i++){
                  count++;
                   
         
            if(c[i]=='L'){
                    l++;  
            
               
            }
            else if(c[i]=='R'){
                      
               r++;
               
            }
        }
//         if(l==r)
        System.out.println(l+r+1);
//         else if(l>r)
//         System.out.println(l+1);
//           else if(l<r)
//         System.out.println(r+1);
    }
}