math 11 enumeration 4 observation 4 recursive 4 apcs 3 binary-search 3 greedy 3 dfs 2 docker 2 dp 2 implementation 2 prefix-sum 2 tree-dp 2 xor 2 arc 1 bfs 1 bitmask-dp 1 calendar 1 combinatorics 1 cross-compile 1 domjudge 1 geometry 1 graph 1 hackmd 1 ics 1 ios 1 iptables 1 kernel 1 knapsack 1 network 1 nginx 1 priotity-queue 1 raspberry-pi 1 recurring 1 shadowsocks 1 shortest-path 1 sorting 1 stack 1 string 1 swift 1 tree 1 tree-diameter 1 two-pointer 1 ufds 1 vpn 1 wireguard 1 討論題 1