Xor/Sum Hashing Xor/Sum Hashingψ(｀∇´)ψ 泛化我等会来写。 CF1175F The Number of Subpermutationsψ(｀∇´)ψ CF1746F Kazaeeψ(｀∇´)ψ CF1418G Three Occurrencesψ(｀∇´)ψ CF1284D New Year and Conferenceψ(｀∇´)ψ 一个联考题ψ(｀∇´)ψ 最后更新: September 6, 2023