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;
template <typename T>
T gcd(T a, T b) {
  return b == 0 ? a : gcd(b, a % b);
}
template <typename T>
T lcm(T a, T b) {
  return a / gcd(a, b) * b;
}
template <typename T>
T ext_gcd(T a, T b, T& first, T& second) {
  if (b == 0) {
    first = 1, second = 0;
    return a;
  }
  T d = ext_gcd(b, a % b, second, first);
  second -= first * (a / b);
  return d;
}
template <typename T>
T inverse(T a, T n) {
  T first, second;
  T t = ext_gcd(a, n, first, second);
  if (t != 1) return -1;
  return (first % n + n) % n;
}
template <typename T>
T Q_mul(T a, T b, T Mod) {
  T ret;
  for (ret = 0; b; b >>= 1, a = (a + a) % Mod)
    if (b & 1) ret = (ret + a) % Mod;
  return ret;
}
template <typename T>
T quick_pow_mod(T a, T b, T Mod) {
  T ret;
  for (ret = 1; b; b >>= 1, (a *= a) %= Mod)
    if (b & 1) (ret *= a) %= Mod;
  return ret;
}
template <typename T>
T quick_pow(T a, T b) {
  T ret;
  for (ret = 1; b; b >>= 1, a *= a)
    if (b & 1) ret *= a;
  return ret;
}
double combination(int n, int r) {
  if (r < n - r) return combination(n, n - r);
  double s = 1.0;
  for (int i = 1; i <= n - r; ++i) s *= (r + i), s /= i;
  return s;
}
template <typename T>
inline void read(T& v) {
  T ret = 0, sgnv = 1;
  char p;
  while (!isdigit(p = getchar()))
    if (p == '-') sgnv = -1;
  do ret = (ret << 3) + (ret << 1) + p - '0';
  while (isdigit(p = getchar()));
  v = sgnv * ret;
}
const int maxn = 100000 + 5;
int main() {
  int n, k, t;
  read(n), read(k), read(t);
  if (1 <= t && t <= k)
    printf("%d", t);
  else if (n <= t && t < n + k)
    printf("%d", k - t + n);
  else
    printf("%d", k);
  return 0;
}
