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.

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.

Note

In the following a sitting spectator is represented as -, a standing spectator is represented as ^.

Idx	Name	Rating	Status
A	Arpa and a research in Mexican wave	800
B	Arpa and an exam about geometry	1400

Codeforces Round 432 (Div. 2, based on IndiaHacks Final Round 2017)