#include <iostream>
using namespace std;
typedef long long ll;

int main() {
    ll X,Y,Z;
    cin>>X>>Y>>Z;
    if (X <= Z && Z < Y) cout << Z - 1 << endl;
    else if (X < Z) cout << Z << endl;
    else cout << Z - 2 << endl; 
    return 0;
}