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.math.*;
 
public class Main implements Runnable
{
	public static void main(String args[]) throws Exception
	{
		new Thread(null, new Main(),"Main",1<<28).start();
	}
 
	static long powerMod(long a, long b, long mod)
	{
		long ans=1L;
 
		while(b>0)
		{
			if((b & 1)!=0)
			{
				ans = (ans*a)%mod;
				--b;
			}
			else
			{
				a = (a * a)%mod;
				b>>=1;
			}
		}
 
		return ans%mod;
	}
 
	public void run()
	{
		InputReader sc = new InputReader(System.in);
		PrintWriter w = new PrintWriter(System.out);
 
		int n=sc.nextInt();
		int k=sc.nextInt();
		int t=sc.nextInt();

		if(n<t)
		{
			w.println(n+k-t);
		}
		else
			w.println(Math.min(k,t));
 
		w.close();
	}
 
 
 	static class Pair
 	{
 		int x;
 		int y;
 
 		public Pair(int x,int y)
 		{
 			this.x=x;
 			this.y=y;
 		}
 	}
 
	static class InputReader
	{
		private InputStream stream;
		private byte[] buf = new byte[1024];
		private int curChar;
		private int numChars;
		private SpaceCharFilter filter;
		
		public InputReader(InputStream stream)
		{
			this.stream = stream;
		}
		
		public int read()
		{
			if (numChars==-1) 
				throw new InputMismatchException();
			
			if (curChar >= numChars)
			{
				curChar = 0;
				try 
				{
					numChars = stream.read(buf);
				}
				catch (IOException e)
				{
					throw new InputMismatchException();
				}
				
				if(numChars <= 0)				
					return -1;
			}
			return buf[curChar++];
		}
	 
		public String nextLine()
		{
			String str = "";
	        try
	        {
				str=new BufferedReader(new InputStreamReader(stream)).readLine();
	        }
	        catch (IOException e)
	        {
	            e.printStackTrace();
	        }
	        return str;
		}
		public int nextInt()
		{
			int c = read();
			
			while(isSpaceChar(c)) 
				c = read();
			
			int sgn = 1;
			
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			
			int res = 0;
			do 
			{
				if(c<'0'||c>'9') 
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			while (!isSpaceChar(c)); 
			
			return res * sgn;
		}
		
		public long nextLong() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			long res = 0;
			
			do 
			{
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			while (!isSpaceChar(c));
				return res * sgn;
		}
		
		public double nextDouble() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') 
			{
				sgn = -1;
				c = read();
			}
			double res = 0;
			while (!isSpaceChar(c) && c != '.') 
			{
				if (c == 'e' || c == 'E')
					return res * Math.pow(10, nextInt());
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			if (c == '.') 
			{
				c = read();
				double m = 1;
				while (!isSpaceChar(c)) 
				{
					if (c == 'e' || c == 'E')
						return res * Math.pow(10, nextInt());
					if (c < '0' || c > '9')
						throw new InputMismatchException();
					m /= 10;
					res += (c - '0') * m;
					c = read();
				}
			}
			return res * sgn;
		}
		
		public String readString() 
		{
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do 
			{
				res.appendCodePoint(c);
				c = read();
			} 
			while (!isSpaceChar(c));
			
			return res.toString();
		}
	 
		public boolean isSpaceChar(int c) 
		{
			if (filter != null)
				return filter.isSpaceChar(c);
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}
	 
		public String next() 
		{
			return readString();
		}
		
		public interface SpaceCharFilter 
		{
			public boolean isSpaceChar(int ch);
		}
	}
 
} 