#include<iostream> #include<string> #include<iomanip> #include<cmath> #include<vector> #include<algorithm> using namespace std; #define int long long #define endl "\n" const long long INF = (long long)1e18; const long long MOD = (long long)1e9 + 7; string yn(bool f){return f?"Yes":"No";} string YN(bool f){return f?"YES":"NO";} signed main(){ cin.tie(0); ios::sync_with_stdio(false); cout<<fixed<<setprecision(10); int X, Y, Z; cin>>X>>Y>>Z; if(Z >= Y) Z -= 2; else if(Z >= X) Z--; cout<<Z<<endl; return 0; }