#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <math.h>
#include <iomanip>

using namespace std;

int main(){
	long long x,y,z;
	cin >> x >> y >> z;
	if(z<x){
		cout << z << endl;
	}else if(x<=z && z<y){
		cout << z-1 << endl;
	}else if(y<=z){
		cout << z-2 << endl;
	}
	return 0;
}