Codeforces 851A && Round #432 Div. 2 A. Arpa and a research in Mexic

A. Arpa and a research in Mexican wave

time limit per test
1 second

memory limit per test
256 megabytes

input
standard input

output
standard output

Arpa is researching the Mexican wave.

There are n spectators in the stadium, labeled from1 ton. They start the Mexican wave at time0.

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 
----------

number of standing spectators = 0.
At t = 1 
^---------

number of standing spectators = 1.
At t = 2 
^^--------

number of standing spectators = 2.
At t = 3 
^^^-------

number of standing spectators = 3.
At t = 4 
^^^^------

number of standing spectators = 4.
At t = 5 
^^^^^-----

number of standing spectators = 5.
At t = 6 
-^^^^^----

number of standing spectators = 5.
At t = 7 
--^^^^^---

number of standing spectators = 5.
At t = 8 
---^^^^^--

number of standing spectators = 5.
At t = 9 
----^^^^^-

number of standing spectators = 5.
At t = 10
-----^^^^^

number of standing spectators = 5.
At t = 11
------^^^^

number of standing spectators = 4.
At t = 12
-------^^^

number of standing spectators = 3.
At t = 13--------^^

number of standing spectators = 2.
At t = 14
---------^

number of standing spectators = 1.
At t = 15----------

number of standing spectators = 0.

题目大意：有n个观众，给你一个k（不懂怎么解释....），再给你一个时间t，问t时刻有多少人站起来。

水题，找个规律就行了

#include<iostream>
#include<cstring>
using namespace std;
int main(){
int n,k,t;
while(cin>>n>>k>>t){
if(t<k) cout<<t<<endl;
else if(t>n) cout<<k-(t-n)<<endl;
else cout<<k<<endl;
}

}