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AtCoder の旧URLからbetaのURLに切り替えるブックマークレットを作った

便利リンク集のAtCoder Scoresの問題リンクが旧URLで
betaの機能を使いたかったので。

愚直にURLを書き換えてるだけですが、、

javascript: (function () {
  var url = location.href;
  if (url.indexOf("contest.atcoder.jp") === -1) {
    return false;
  }
  var oldhost = location.host;
  var contest = oldhost.split('.')[0];
  var beta = `beta.atcoder.jp/contests/${contest}`;
  location.href = url.replace(oldhost, betahost);
})()
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