#include <bits/stdc++.h>
using namespace std;

using ll=long long;
ll mod=1000000007;
ll INF=1LL<<60;

int main() {
	ll X,Y,Z;
	cin >> X >> Y >> Z;
	if(Z<X)cout << Z << endl;
	else if(Z<Y)cout << Z-1 << endl;
	else cout <<Z-2 <<endl;
}