Basic Algorithm

li chao tree
alien trick
SA
MO's algorithm and sqrt decomposition - > elepant
centroid decomposition
flow(dinic, bipartite matching)
HLD
segment tree with lazy propagation
dp optimization(CHT, D&C, knuth)
bcc
cactus
geometry
scc & 2-sat
persistent segment tree
string(kmp, aho-corasick)
parallel binary search