#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

const int MOD=1000000007;
const int INF=0x3f3f3f3f;
const ll INFL=0x3f3f3f3f3f3f3f3f;

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;
}