Imports github.com/PuerkitoBio/goquery github.com/isucon/isucandar github.com/isucon/isucandar/agent github.com/isucon/isucandar/failure github.com/isucon/isucandar/score github.com/isucon/isucandar/worker Standard library imports bytes context crypto/md5 encoding/hex encoding/json flag fmt image image/color image/png io io/ioutil log math/rand mime/multipart net/http net/textproto net/url os strconv strings sync time