package main

import (
	"image/jpeg"
	"image/png"
	"os"
)

func main() {
	// open image
	img, err := jpeg.Decode(os.Stdin)
	if err != nil {
		panic(err)
	}
	// no pre-processing needed so we just
	// write image
	err = png.Encode(os.Stdout, Downscaled{img, 3})
	if err != nil {
		panic(err)
	}
}