AHC015 https://speakerdeck.com/thunderc/toyota-ahc-zhi-gao-noarugorizumujie-shuo-hui-ahc015 AHC026 https://speakerdeck.com/bowwowforeach/toyotazi-dong-che-puroguramingukontesuto2023-number-6-atcoder-heuristic-contest-026-zhi-gao-noarugoriz…