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.util.*;
import java.io.*;


public class Main {
    public static void main(String[] args) throws IOException{
        InputReader in = new InputReader(System.in);
        
        int n = in.nextInt();
        String s = in.nextString();

        int l = 0, r = 0;
        
        for (int i = 0; i < n; i++) {
            if (s.charAt(i) == 'L') {
                l++;
            } else {
                r++;
            }
        }

        System.out.println(r + l + 1);
        
    } 
}



/**
 * A very fast input reader to read data from any InputStream (System.in in particular).
 * I primarily use this input reader for competitive programming to get an edge on the
 * time required to read input. That being said, this input reader assumes you know what
 * data types you are reading in and will not do any validation of input whatsoever!
 *
 * @author William Fiset, william.alexandre.fiset@gmail.com
 **/

class InputReader {
  
    /**
     * The default size of the InputReader's buffer is 2<sup>16</sup>.
     */
    private static final int DEFAULT_BUFFER_SIZE = 1 << 16;
    
    /**
     * The default stream for the InputReader is standard input.
     */  
    private static final InputStream DEFAULT_STREAM = System.in;
    
    /**
     * The maximum number of accurate decimal digits the method {@link #nextDoubleFast() nextDoubleFast()} can read.
     * Currently this value is set to 21 because it is the maximum number of digits a double precision float can have at the moment.
     */
    private static final int MAX_DECIMAL_PRECISION = 21;
    
    // 'c' is used to refer to the current character in the stream
    private int c;
    
    // Variables associated with the byte buffer. 
    private byte[] buf;
    private int bufferSize, bufIndex, numBytesRead;
    
    private InputStream stream;
  
    // End Of File (EOF) character
    private static final byte EOF   = -1;
  
    // New line character: '\n'
    private static final byte NEW_LINE = 10;
  
    // Space character: ' '
    private static final byte SPACE = 32;
  
    // Dash character: '-'
    private static final byte DASH  = 45;
  
    // Dot character: '.'
    private static final byte DOT   = 46;
  
    // A reusable character buffer when reading string data.
    private char[] charBuffer;
  
    // Primitive data type lookup tables used for optimizations
    private static byte[] bytes = new byte[58];
    private static  int[] ints  = new int[58];
    private static char[] chars = new char[128];
  
    static {
      char ch = ' '; int value = 0; byte _byte = 0;
      for (int i = 48; i <  58; i++ ) bytes[i] = _byte++;
      for (int i = 48; i <  58; i++ )  ints[i] = value++;
      for (int i = 32; i < 128; i++ ) chars[i] = ch++;
    }
  
    // Primitive double lookup table used for optimizations.
    private static final double[][] doubles = {
      { 0.0d,0.00d,0.000d,0.0000d,0.00000d,0.000000d,0.0000000d,0.00000000d,0.000000000d,0.0000000000d,0.00000000000d,0.000000000000d,0.0000000000000d,0.00000000000000d,0.000000000000000d,0.0000000000000000d,0.00000000000000000d,0.000000000000000000d,0.0000000000000000000d,0.00000000000000000000d,0.000000000000000000000d },
      { 0.1d,0.01d,0.001d,0.0001d,0.00001d,0.000001d,0.0000001d,0.00000001d,0.000000001d,0.0000000001d,0.00000000001d,0.000000000001d,0.0000000000001d,0.00000000000001d,0.000000000000001d,0.0000000000000001d,0.00000000000000001d,0.000000000000000001d,0.0000000000000000001d,0.00000000000000000001d,0.000000000000000000001d },
      { 0.2d,0.02d,0.002d,0.0002d,0.00002d,0.000002d,0.0000002d,0.00000002d,0.000000002d,0.0000000002d,0.00000000002d,0.000000000002d,0.0000000000002d,0.00000000000002d,0.000000000000002d,0.0000000000000002d,0.00000000000000002d,0.000000000000000002d,0.0000000000000000002d,0.00000000000000000002d,0.000000000000000000002d },
      { 0.3d,0.03d,0.003d,0.0003d,0.00003d,0.000003d,0.0000003d,0.00000003d,0.000000003d,0.0000000003d,0.00000000003d,0.000000000003d,0.0000000000003d,0.00000000000003d,0.000000000000003d,0.0000000000000003d,0.00000000000000003d,0.000000000000000003d,0.0000000000000000003d,0.00000000000000000003d,0.000000000000000000003d },
      { 0.4d,0.04d,0.004d,0.0004d,0.00004d,0.000004d,0.0000004d,0.00000004d,0.000000004d,0.0000000004d,0.00000000004d,0.000000000004d,0.0000000000004d,0.00000000000004d,0.000000000000004d,0.0000000000000004d,0.00000000000000004d,0.000000000000000004d,0.0000000000000000004d,0.00000000000000000004d,0.000000000000000000004d },
      { 0.5d,0.05d,0.005d,0.0005d,0.00005d,0.000005d,0.0000005d,0.00000005d,0.000000005d,0.0000000005d,0.00000000005d,0.000000000005d,0.0000000000005d,0.00000000000005d,0.000000000000005d,0.0000000000000005d,0.00000000000000005d,0.000000000000000005d,0.0000000000000000005d,0.00000000000000000005d,0.000000000000000000005d },
      { 0.6d,0.06d,0.006d,0.0006d,0.00006d,0.000006d,0.0000006d,0.00000006d,0.000000006d,0.0000000006d,0.00000000006d,0.000000000006d,0.0000000000006d,0.00000000000006d,0.000000000000006d,0.0000000000000006d,0.00000000000000006d,0.000000000000000006d,0.0000000000000000006d,0.00000000000000000006d,0.000000000000000000006d },
      { 0.7d,0.07d,0.007d,0.0007d,0.00007d,0.000007d,0.0000007d,0.00000007d,0.000000007d,0.0000000007d,0.00000000007d,0.000000000007d,0.0000000000007d,0.00000000000007d,0.000000000000007d,0.0000000000000007d,0.00000000000000007d,0.000000000000000007d,0.0000000000000000007d,0.00000000000000000007d,0.000000000000000000007d },
      { 0.8d,0.08d,0.008d,0.0008d,0.00008d,0.000008d,0.0000008d,0.00000008d,0.000000008d,0.0000000008d,0.00000000008d,0.000000000008d,0.0000000000008d,0.00000000000008d,0.000000000000008d,0.0000000000000008d,0.00000000000000008d,0.000000000000000008d,0.0000000000000000008d,0.00000000000000000008d,0.000000000000000000008d },
      { 0.9d,0.09d,0.009d,0.0009d,0.00009d,0.000009d,0.0000009d,0.00000009d,0.000000009d,0.0000000009d,0.00000000009d,0.000000000009d,0.0000000000009d,0.00000000000009d,0.000000000000009d,0.0000000000000009d,0.00000000000000009d,0.000000000000000009d,0.0000000000000000009d,0.00000000000000000009d,0.000000000000000000009d }
    };
    
    /**
     * Create an InputReader that reads from standard input.
     */
    public InputReader () {
      this(DEFAULT_STREAM, DEFAULT_BUFFER_SIZE);
    }
    
    /**
     * Create an InputReader that reads from standard input.
     * @param bufferSize    The buffer size for this input reader.
     */
    public InputReader(int bufferSize) {
      this(DEFAULT_STREAM, bufferSize);
    }
    
    /**
     * Create an InputReader that reads from standard input.
     * @param stream  Takes an InputStream as a parameter to read from.
     */
    public InputReader(InputStream stream) {
      this(stream, DEFAULT_BUFFER_SIZE);
    }
  
    /**
     * Create an InputReader that reads from standard input.
     * @param  stream        Takes an {@link java.io.InputStream#InputStream() InputStream} as a parameter to read from.
     * @param  bufferSize    The size of the buffer to use.
     */
    public InputReader (InputStream stream, int bufferSize) {
      if (stream == null || bufferSize <= 0)
        throw new IllegalArgumentException();
      buf = new byte[bufferSize];
      charBuffer = new char[128];
      this.bufferSize = bufferSize;
      this.stream = stream;
    }
    
    /**
     * Reads a single character from the input stream.
     * @return Returns the byte value of the next character in the buffer and EOF 
     * at the end of the stream.
     * @throws IOException throws exception if there is no more data to read
     */
    private byte read() throws IOException {
  
      if (numBytesRead == EOF) throw new IOException();
  
      if (bufIndex >= numBytesRead) {
        bufIndex = 0;
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF)
          return EOF;
      }
  
      return buf[bufIndex++];
    }
    
    /**
     *  Read values from the input stream until you reach a character with a 
     *  higher ASCII value than 'token'.
     * @param token The token is a value which we use to stop reading junk out of
     * the stream.
     * @return Returns 0 if a value greater than the token was reached or -1 if
     * the end of the stream was reached.
     * @throws IOException Throws exception at end of stream.
     */
    private int readJunk(int token) throws IOException { 
      
      if (numBytesRead == EOF) return EOF;
  
      // Seek to the first valid position index
      do {
        
        while(bufIndex < numBytesRead) {
          if (buf[bufIndex] > token) return 0;
          bufIndex++;
        }
  
        // reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return EOF;
        bufIndex = 0;
  
      } while(true);
  
    }
    
    /**
     * Reads a single byte from the input stream.
     * @return The next byte in the input stream
     * @throws IOException Throws exception at end of stream.
     */
    public byte nextByte() throws IOException {
      return (byte) nextInt();
    }
    
    /**
     * Reads a 32 bit signed integer from input stream.
     * @return The next integer value in the stream.
     * @throws IOException Throws exception at end of stream.
     */
    public int nextInt() throws IOException {
      
      if (readJunk(DASH-1) == EOF) throw new IOException();
      int sgn = 1, res = 0;
  
      c = buf[bufIndex];
      if (c == DASH) { sgn = -1; bufIndex++; }
  
      do {
  
        while(bufIndex < numBytesRead) {
          if (buf[bufIndex] > SPACE) {
            res = (res<<3)+(res<<1);
            res += ints[buf[bufIndex++]];
          } else {
            bufIndex++;
            return res*sgn;
          }
        }
  
        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return res*sgn;
        bufIndex = 0;
  
      } while(true);
  
    }
  
    /**
     * Reads a 64 bit signed long from input stream.
     * @return The next long value in the stream.
     * @throws IOException Throws exception at end of stream.
     */
    public long nextLong() throws IOException {
      
      if (readJunk(DASH-1) == EOF) throw new IOException();
      int sgn = 1;
      long res = 0L;
      c = buf[bufIndex];
      if (c == DASH) { sgn = -1; bufIndex++; }
  
      do {
  
        while(bufIndex < numBytesRead) {
          if (buf[bufIndex] > SPACE) {
            res = (res<<3)+(res<<1);
            res += ints[buf[bufIndex++]];
          } else {
            bufIndex++;
            return res*sgn;
          }
        }
  
        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return res*sgn;
        bufIndex = 0;
  
      } while(true);
  
    }
    
    /**
     * Doubles the size of the internal char buffer for strings
     */
    private void doubleCharBufferSize() {
      char[] newBuffer = new char[charBuffer.length << 1];
      for(int i = 0; i < charBuffer.length; i++) newBuffer[i] = charBuffer[i];
      charBuffer = newBuffer;
    }
  
    /**
     * Reads a line from the input stream.
     * @return Returns a line from the input stream in the form a String not 
     * including the new line character. Returns <code>null</code> when there are 
     * no more lines. 
     * @throws IOException Throws IOException when something terrible happens.
     */
    public String nextLine() throws IOException {
  
      try { c=read(); } catch (IOException e) { return null; }
      if (c == NEW_LINE) return ""; // Empty line
      if (c == EOF) return null; // EOF
      
      int i = 0;
      charBuffer[i++] = (char)c;
  
      do {
  
        while(bufIndex < numBytesRead) {
          if (buf[bufIndex] != NEW_LINE) {
            if (i == charBuffer.length) doubleCharBufferSize();
            charBuffer[i++] = (char) buf[bufIndex++];
          } else {
            bufIndex++;
            return new String(charBuffer, 0, i);
          }
        }
  
        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF)
          return new String(charBuffer, 0, i);
        bufIndex = 0;
  
      } while(true);
  
    }
  
    // Reads a string of characters from the input stream. 
    // The delimiter separating a string of characters is set to be:
    // any ASCII value <= 32 meaning any spaces, new lines, EOF, tabs...
    public String nextString() throws IOException {
      if (numBytesRead == EOF) return null;
      if (readJunk(SPACE) == EOF) return null;
  
      for(int i = 0;;) {
        while(bufIndex < numBytesRead) {
          if (buf[bufIndex] > SPACE) {
            if (i == charBuffer.length) doubleCharBufferSize();
            charBuffer[i++] = (char) buf[bufIndex++];
          } else {
            bufIndex++;
            return new String(charBuffer, 0, i);
          }
        }
  
        // Reload buffer
        numBytesRead = stream.read(buf);
        if (numBytesRead == EOF) return new String(charBuffer, 0, i);
        bufIndex = 0;
      }
    }
  
    // Returns an exact value a double value from the input stream.
    public double nextDouble() throws IOException {
      String doubleVal = nextString();
      if (doubleVal == null) throw new IOException();
      return Double.valueOf(doubleVal);
    }
  
    // Very quickly reads a double value from the input stream (~3x faster than nextDouble()). However,
    // this method may provide a slightly less accurate reading than .nextDouble() if there are a lot
    // of digits (~16+). In particular, it will only read double values with at most 21 digits after
    // the decimal point and the reading my be as inaccurate as ~5*10^-16 from the true value.
    public double nextDoubleFast() throws IOException {
      c = read(); int sgn = 1;
      while (c <= SPACE) c = read(); // while c is either: ' ', '\n', EOF
      if (c == DASH) { sgn = -1; c = read(); }
      double res = 0.0;
      // while c is not: ' ', '\n', '.' or -1
      while (c > DOT) {res *= 10.0; res += ints[c]; c = read(); }
      if (c == DOT) {
        int i = 0; c = read();
        // while c is digit and we are less than the maximum decimal precision
        while (c > SPACE && i < MAX_DECIMAL_PRECISION) {
          res += doubles[ints[c]][i++]; c = read();
        }
      }
      return res * sgn;
    }
  
    // Read an array of n byte values
    public byte[] nextByteArray(int n) throws IOException {
      byte[] ar = new byte[n];
      for (int i = 0; i < n; i++) ar[i] = nextByte();
      return ar;
    }
  
    // Read an integer array of size n
    public int[] nextIntArray(int n) throws IOException {
      int[] ar = new int[n];
      for (int i = 0; i < n; i++) ar[i] = nextInt();
      return ar;
    }
  
    // Read a long array of size n
    public long[] nextLongArray(int n) throws IOException {
      long[] ar = new long[n];
      for (int i = 0; i < n; i++) ar[i] = nextLong();
      return ar;
    }
  
    // read an of doubles of size n 
    public double[] nextDoubleArray(int n) throws IOException {
      double[] ar = new double[n];
      for (int i = 0; i < n; i++) ar[i] = nextDouble();
      return ar;
    }
  
    // Quickly read an array of doubles
    public double[] nextDoubleArrayFast(int n) throws IOException {
      double[] ar = new double[n];
      for (int i = 0; i < n; i++) ar[i] = nextDoubleFast();
      return ar;
    }
    
    // Read a string array of size n
    public String[] nextStringArray(int n) throws IOException {
      String[] ar = new String[n];
      for (int i = 0; i < n; i++) {
        String str = nextString();
        if (str == null) throw new IOException();
        ar[i] = str;
      }
      return ar;
    }
  
    // Read a 1-based byte array of size n+1
    public byte[] nextByteArray1(int n) throws IOException {
      byte[] ar = new byte[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextByte();
      return ar;
    }
  
    // Read a 1-based integer array of size n+1
    public int[] nextIntArray1(int n) throws IOException {
      int[] ar = new int[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextInt();
      return ar;
    }
  
    // Read a 1-based long array of size n+1
    public long[] nextLongArray1(int n) throws IOException {
      long[] ar = new long[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextLong();
      return ar;
    }
  
    // Read a 1-based double array of size n+1
    public double[] nextDoubleArray1(int n) throws IOException {
      double[] ar = new double[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextDouble();
      return ar;
    }
  
    // Quickly read a 1-based double array of size n+1
    public double[] nextDoubleArrayFast1(int n) throws IOException {
      double[] ar = new double[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextDoubleFast();
      return ar;
    }
  
    // Read a 1-based string array of size n+1
    public String[] nextStringArray1(int n) throws IOException {
      String[] ar = new String[n+1];
      for (int i = 1; i <= n; i++) ar[i] = nextString();
      return ar;
    }
  
    // Read a two dimensional matrix of bytes of size rows x cols
    public byte[][] nextByteMatrix(int rows, int cols) throws IOException {
      byte[][] matrix = new byte[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextByte();
      return matrix;
    }
  
    // Read a two dimensional matrix of ints of size rows x cols
    public int[][] nextIntMatrix(int rows, int cols) throws IOException {
      int[][] matrix = new int[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextInt();
      return matrix;
    }
  
    // Read a two dimensional matrix of longs of size rows x cols
    public long[][] nextLongMatrix(int rows, int cols) throws IOException {
      long[][] matrix = new long[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextLong();
      return matrix;
    }
  
    // Read a two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrix(int rows, int cols) throws IOException {
      double[][] matrix = new double[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextDouble();
      return matrix;
    }
  
    // Quickly read a two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrixFast(int rows, int cols) throws IOException {
      double[][] matrix = new double[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextDoubleFast();
      return matrix;
    }
    
    // Read a two dimensional matrix of Strings of size rows x cols
    public String[][] nextStringMatrix(int rows, int cols) throws IOException {
      String[][] matrix = new String[rows][cols];
      for(int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++)
          matrix[i][j] = nextString();
      return matrix;    
    }
  
    // Read a 1-based two dimensional matrix of bytes of size rows x cols
    public byte[][] nextByteMatrix1(int rows, int cols) throws IOException {
      byte[][] matrix = new byte[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextByte();
      return matrix;
    }
  
    // Read a 1-based two dimensional matrix of ints of size rows x cols
    public int[][] nextIntMatrix1(int rows, int cols) throws IOException {
      int[][] matrix = new int[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextInt();
      return matrix;
    }
  
    // Read a 1-based two dimensional matrix of longs of size rows x cols
    public long[][] nextLongMatrix1(int rows, int cols) throws IOException {
      long[][] matrix = new long[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextLong();
      return matrix;
    }
  
    // Read a 1-based two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrix1(int rows, int cols) throws IOException {
      double[][] matrix = new double[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextDouble();
      return matrix;
    }
  
    // Quickly read a 1-based two dimensional matrix of doubles of size rows x cols
    public double[][] nextDoubleMatrixFast1(int rows, int cols) throws IOException {
      double[][] matrix = new double[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextDoubleFast();
      return matrix;
    }
    
    // Read a 1-based two dimensional matrix of Strings of size rows x cols
    public String[][] nextStringMatrix1(int rows, int cols) throws IOException {
      String[][] matrix = new String[rows+1][cols+1];
      for(int i = 1; i <= rows; i++)
        for (int j = 1; j <= cols; j++)
          matrix[i][j] = nextString();
      return matrix;    
    }
  
    // Closes the input stream
    public void close() throws IOException {
      stream.close();
    }
  
  }