Arpa is researching the Mexican wave.

There are n spectators in the stadium, labeled from 1 to n. They start the Mexican wave at time 0. 

  * At time 1, the first spectator stands. 
  * At time 2, the second spectator stands. 
  * ...
  * At time k, the k-th spectator stands. 
  * At time k + 1, the (k + 1)-th spectator stands and the first spectator sits. 
  * At time k + 2, the (k + 2)-th spectator stands and the second spectator sits. 
  * ...
  * At time n, the n-th spectator stands and the (n - k)-th spectator sits. 
  * At time n + 1, the (n + 1 - k)-th spectator sits. 
  * ...
  * At time n + k, the n-th spectator sits. 



Arpa wants to know how many spectators are standing at time t.

Input

The first line contains three integers n, k, t (1 ≤ n ≤ 109, 1 ≤ k ≤ n, 1 ≤ t < n + k).

Output

Print single integer: how many spectators are standing at time t.

Examples

Input

10 5 3


Output

3


Input

10 5 7


Output

5


Input

10 5 12


Output

3

Note

In the following a sitting spectator is represented as -, a standing spectator is represented as ^.

  * At t = 0  ---------- <image> number of standing spectators = 0. 
  * At t = 1  ^--------- <image> number of standing spectators = 1. 
  * At t = 2  ^^-------- <image> number of standing spectators = 2. 
  * At t = 3  ^^^------- <image> number of standing spectators = 3. 
  * At t = 4  ^^^^------ <image> number of standing spectators = 4. 
  * At t = 5  ^^^^^----- <image> number of standing spectators = 5. 
  * At t = 6  -^^^^^---- <image> number of standing spectators = 5. 
  * At t = 7  --^^^^^--- <image> number of standing spectators = 5. 
  * At t = 8  ---^^^^^-- <image> number of standing spectators = 5. 
  * At t = 9  ----^^^^^- <image> number of standing spectators = 5. 
  * At t = 10 -----^^^^^ <image> number of standing spectators = 5. 
  * At t = 11 ------^^^^ <image> number of standing spectators = 4. 
  * At t = 12 -------^^^ <image> number of standing spectators = 3. 
  * At t = 13 --------^^ <image> number of standing spectators = 2. 
  * At t = 14 ---------^ <image> number of standing spectators = 1. 
  * At t = 15 ---------- <image> number of standing spectators = 0. 
import java.util.*;
import java.io.*;
import java.time.*;
import java.math.*;
import java.awt.*;

public class Solution {
	static String input="input.txt", out="output.txt";
	static Scan scan;
	//don't forget to change input to STDIN before submitting
	public static void main(String[] args) throws Exception{
		Scan scan=new Scan();
		int n = scan.nextInt();
		int k = scan.nextInt();
		int t = scan.nextInt();
		System.out.println(sol(n, t, k));

	}
	
	public static int sol(int n, int t, int k){
		if(t <=k) return t;
		if(t > n) return n+k-t;
		return k;
	}
	
	
	//Optimized Scanner Class, includes next String, int, Long, double, line
	static class Scan{
	        BufferedReader br;
	        StringTokenizer st;
	 
	        public Scan(String file) throws IOException{
	            br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
	            
	        }
	 
	        public Scan() throws IOException{
	            br = new BufferedReader(new InputStreamReader(System.in));
	        }
	        
	        String next(){
	            while (st == null || !st.hasMoreElements()){
	                try{
	                    st = new StringTokenizer(br.readLine());
	                }
	                catch (IOException  e){
	                    e.printStackTrace();
	                }
	            }
	            return st.nextToken();
	        }
	 
	        int nextInt(){
	            return Integer.parseInt(next());
	        }
	 
	        long nextLong(){
	            return Long.parseLong(next());
	        }
	 
	        double nextDouble(){
	            return Double.parseDouble(next());
	        }
	 
	        String nextLine(){
	            String str = "";
	            try{
	                str = br.readLine();
	            }
	            catch (IOException e){
	                e.printStackTrace();
	            }
	            return str;
	        }
	    }
}
