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. 
//package CodeForces;

/*In the name of Allah the Most Merciful.
 * Author
 * Md. Toufiqul Islam
 * Dept. Of CSE
 * Ahsanullah University Of Science And Technology
*/

import java.io.*;
import java.util.*;
public class R432A {


          //Code for Faster Input
    	  public 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;
    	      }

    	   }
    	   //--------------------------------------------------------
           public static void main(String[] args) {
               MyScanner sc = new MyScanner();
               long n = sc.nextLong();
               long k = sc.nextLong();
               long t = sc.nextLong();

               if(t<=k){
                   System.out.println(t);
               }
               else if(t>n){
                   long temp = t-k;
                   long a = n;
                   System.out.println(n-temp);
               }
               else if(t>k){
                   long temp = t-k;
                   System.out.println(t-temp);
               }
           }
}
