// ==UserScript==
// @name         Codeforces Problem Statement Jumper
// @namespace    https://github.com/ScrapW
// @version      1.0
// @description  将Problemset下的题目页面跳转至该Contest下的题目页面
// @author       ScrapW
// @match        https://codeforces.com/problemset/problem/*
// @match        http://codeforces.com/problemset/problem/*
// @match        https://codeforc.es/problemset/problem/*
// @match        http://codeforc.es/problemset/problem/*
// @run-at document-start
// @downloadURL none
// ==/UserScript==

var protocol = window.location.protocol
var host = window.location.host
var path = window.location.pathname
path=path.substr(path.lastIndexOf("problem/")+8)
var contest = path.substr(0,path.search('/'))
var no = path.substr(path.search('/')+1)

var tar=protocol+"//"+host+"/contest/"+contest+"/problem/"+no

window.location.href = tar