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.io.*;
import java.util.*;
public class CF851_D2_A {
	public static void main(String[] args)throws Throwable {
		MyScanner sc=new MyScanner();
		PrintWriter pw=new PrintWriter(System.out);
		
		int n=sc.nextInt();
		int k=sc.nextInt();
		int t=sc.nextInt();
		
		if(t<=k)
			pw.println(t);
		else
			if(t>=n)
				pw.println(n+k-t);
			else
				pw.println(k);
		
		pw.flush();
		pw.close();
	}
	
	static class MyScanner {
		BufferedReader br;
		StringTokenizer st;
		public MyScanner() {
			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;}
	}
}