text: public func root(_ value: Int) -> Int {
      var low = 0
      var high = value
  
      while low <= high {
          let mid = low + (high - low) / 2
  
          if Double(mid) * Double(mid) <= Double(value) {
              low = mid + 1
          } else {
              high = mid - 1
          }
      }
  
      return low - 1
  }
  