#include <iostream>
#include <stdio.h>
#include <stdint.h>
using namespace std;

using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define RETURN( ANSWER ) cout << ( ANSWER ) << endl; return 0 

#include <cassert>

int main()
{
  CIN( ll , A );
  CIN( ll , B );
  assert( -1000000000000000000 <= A && A <= 1000000000000000000 );
  assert( -1000000000000000000 <= B && B <= 1000000000000000000 );
  assert( A == 1 ? B == 0 : true );
  RETURN( A == 1 ? 0 : -B / ( A - 1 ) );
}