static int floorSqrt ( int x ) {
  if ( x == 0 || x == 1 ) return x ;
  int i = 1 , result = 1 ;
  while ( result <= x ) {
    i ++ ;
    result = i * i ;
  }
  return i - 1 ;
}

static int floorSqrt ( int x ) { if ( x == 0 || x == 1 ) return x ; int i = 1 , result = 1 ; while ( result <= x ) { i ++ ; result = i * i ; } return i - 1 ; }
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