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. 
#include <bits/stdc++.h>
using namespace std;
class mstream {
 private:
  int res = 0;
  bool right = 0, sign = 0, space = 0, zero = 0;
  int width = 0, precision = 0, maxwidth = 1e6;
  string interval = "";
  const char* formstr(bool ri, bool si, bool sp, bool ze, bool wi, bool pr,
                      string ty) {
    string f = "%";
    if (ri && right) f += "-";
    if (si && sign) f += "+";
    if (sp && space) f += " ";
    if (ze && zero) f += "0";
    if (wi) f += "*";
    if (pr) f += ".*";
    f += ty;
    f += "%s";
    return f.c_str();
  }

 public:
  operator int() { return res; }
  mstream() {}
  mstream operator()() {
    res = 0;
    return *this;
  }
  mstream setright(bool n = 1) {
    right = n;
    return *this;
  }
  mstream setleft(bool n = 1) {
    right = !n;
    return *this;
  }
  mstream setsign(bool n = 1) {
    sign = n;
    return *this;
  }
  mstream notsign(bool n = 1) {
    sign = !n;
    return *this;
  }
  mstream setspace(bool n = 1) {
    space = n;
    return *this;
  }
  mstream notspace(bool n = 1) {
    space = !n;
    return *this;
  }
  mstream setzero(bool n = 1) {
    zero = n;
    return *this;
  }
  mstream notzero(bool n = 1) {
    zero = !n;
    return *this;
  }
  mstream setwidth(int n = 0) {
    width = n;
    return *this;
  }
  mstream setprecision(int n = 6) {
    precision = n;
    return *this;
  }
  mstream setmaxwidth(int n = 1e6) {
    maxwidth = n;
    return *this;
  }
  mstream setinterval(string n = " ") {
    interval = n;
    return *this;
  }
  mstream notinterval(string n = "") {
    interval = n;
    return *this;
  }
  mstream operator>>(int& x) {
    int r = scanf("%d", &x);
    if (r != EOF) res += r;
    return *this;
  }
  mstream operator>>(long long& x) {
    int r = scanf("%I64d", &x);
    if (r != EOF) res += r;
    return *this;
  }
  mstream operator>>(float& x) {
    int r = scanf("%f", &x);
    if (r != EOF) res += r;
    return *this;
  }
  mstream operator>>(double& x) {
    int r = scanf("%lf", &x);
    if (r != EOF) res += r;
    return *this;
  }
  mstream operator>>(char& x) {
    int r = scanf("%c", &x);
    if (r != EOF) res += r;
    return *this;
  }
  mstream operator>>(string& x) {
    char s[maxwidth + 1];
    int r = scanf("%s", s);
    if (r != EOF) x = s, res += r;
    return *this;
  }
  mstream operator<<(int x) {
    int r = printf(formstr(1, 1, 1, 1, 1, 0, "d"), width, x, interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
  mstream operator<<(long long x) {
    int r =
        printf(formstr(1, 1, 1, 1, 1, 0, "I64d"), width, x, interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
  mstream operator<<(float x) {
    int r = printf(formstr(1, 1, 1, 1, 1, 1, "f"), width, precision, x,
                   interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
  mstream operator<<(double x) {
    int r = printf(formstr(1, 1, 1, 1, 1, 1, "lf"), width, precision, x,
                   interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
  mstream operator<<(char x) {
    int r = printf(formstr(1, 0, 0, 1, 1, 0, "c"), width, x, interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
  mstream operator<<(string x) {
    int r = printf(formstr(1, 0, 0, 1, 1, 1, "s"), width, maxwidth, x.c_str(),
                   interval.c_str());
    if (r > 0) res += r;
    return *this;
  }
};
mstream mstr = mstream();
int main() {
  int n, k, t;
  mstr >> n >> k >> t;
  if (t <= k)
    mstr << t;
  else if (t >= n)
    mstr << n + k - t;
  else
    mstr << k;
}
