#include<iostream>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<vector>
#include<map>
using namespace std;
typedef long long ll;
int main() {
  ll x,y,z;
  cin >> x >> y >> z;
  if(z<x) {
      cout << z << endl;
  }
  else if(x<=z&&z<y) {
      cout << z-1 << endl;
  }
  else {
      cout << z-2 << endl;
  }
}