https://imgur.com/A1n9LWj. Many problem statements are empty. Is everyone facing this issue?

I cannot access Topcoder editorials which were located at https://apps.topcoder.com/wiki/display/tc/Algorithm+Problem+Set+Analysis. Can you see it?

Title of blog

Any hints for Problem — https://community.topcoder.com/stat?c=problem_statement&pm=8712 I have following dp state — dp[r][b][v] — the maximum chip obtained by having predicting r red cards, b black cards having v chips. Is this dp state correct? How to do transition?

How programming contest problems have changed over the years? Is it good idea to solve previous TopCoder SRM(because they have better editorials) or should i practise on recent CF problemsets?