#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main()
{
    ll x, y, z;
    cin>>x>>y>>z;
    
    ll n = x;
    if(x<=z)
      n -= 1;  
    if(y<=z)
      n -= 1;
    cout<< n <<endl;
    return 0; 
}