I tried submitting a solution with the same idea as this guy for problem but I got WA test 2 but he got AC (passed system tests too). the submission: 196672015 What I noticed was if you submit the exact same code in c++17 you get an AC but c++20 you get a Wrong answer on test 2 which it should be getting (just see the case it fails on) but magically it has passed system tests!!!! Please help regarding this Mike Mirzayanov.