static int findTileCount ( int x , int y , int l , int r ) {
  int lcm = ( x * y ) / __gcd ( x , y ) ;
  int countl = ( l - 1 ) / lcm ;
  int countr = r / lcm ;
  return countr - countl ;
}

static int findTileCount ( int x , int y , int l , int r ) { int lcm = ( x * y ) / __gcd ( x , y ) ; int countl = ( l - 1 ) / lcm ; int countr = r / lcm ; return countr - countl ; }
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