Hi! I have same problem as a lot of users. My code on D got TL on system tests (https://mirror.codeforces.com/contest/1716/submission/167004235), but then I tried to send it again (with adding enters in code ^_^, since codeforces do not able you to send the same code twice) and on all submitions i got AC ( https://mirror.codeforces.com/contest/1716/submission/167088073 , https://mirror.codeforces.com/contest/1716/submission/167088034 , https://mirror.codeforces.com/contest/1716/submission/167087989 , https://mirror.codeforces.com/contest/1716/submission/167087971 , https://mirror.codeforces.com/contest/1716/submission/167087910 , https://mirror.codeforces.com/contest/1716/submission/167087871 and all other submitions see in my profile). I think that's really unfair.