Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

Complete the Permutations

combinatorics, fft, graphs, math

Binary Table

bitmasks, brute force, divide and conquer, dp, fft, math

Thief in a Shop

divide and conquer, dp, fft, math

Transforming Sequence

combinatorics, dp, fft, math

Kyoya and Train

dp, fft, graphs, math, probabilities

Fuzzy Search

bitmasks, brute force, fft

Design Tutorial: Increase the Constraints

bitmasks, data structures, fft

The Child and Binary Tree

combinatorics, divide and conquer, fft, number theory

Painting Square

dp, fft

Ladies' Shop

constructive algorithms, fft, math