#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<string.h>
#include<math.h>
#include<utility>
#include<map>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vi;
typedef vector<string> vs;
typedef pair<ll,ll> P;
typedef vector<P> vp;
#define REP(i,n) for(ll i=0;i<n;i++)
#define FOR(i,m,n) for(ll i=m;i<n;i++)
#define REPR(i,n) for(ll i=n-1;i>=0;i--)
#define FORR(i,n,m) for(ll i=n-1;i>=m;i--)
#define all(in) in.begin(),in.end()
#define ALL(in,K) in,in+K
#define INF 100000000
#define MOD 100000007
#define SIZE 100005

int main(){
  ll a,b,c,ans;
  cin >> a >> b >> c;
  FOR(i,a,b){if(ans%i==0){ans++;}}
  cotu << ans << endl;
}
