Memory for Arrays

binary search, bitmasks, greedy

Network Mask

*special problem, bitmasks, brute force, implementation

Permutation Sum

bitmasks, combinatorics, dp, implementation, meet-in-the-middle

Sausage Maximization

bitmasks, data structures, trees

The Minimum Number of Variables

bitmasks, dp

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math

Two Sets

bitmasks, math

Undoubtedly Lucky Numbers

bitmasks, brute force, dfs and similar

The Brand New Function

bitmasks

XOR on Segment

bitmasks, data structures

Friends

binary search, bitmasks, data structures, math

Quick Tortoise

bitmasks, divide and conquer, dp

Table

bitmasks, combinatorics, dp, math

Snake

bitmasks, dfs and similar, graphs, implementation

Array

bitmasks, implementation, two pointers

Bitonix' Patrol

bitmasks, brute force, combinatorics, dfs and similar, math

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

LLPS

binary search, bitmasks, brute force, greedy, implementation, strings

Brand New Problem

bitmasks, brute force, dp

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Garden

bitmasks, dp, graphs, trees

PFAST Inc.

bitmasks, brute force, graphs

Petya and Spiders

bitmasks, dp, dsu

Arrangement

bitmasks, dp

Robot in Basement

bitmasks, brute force, implementation

Lucky Numbers (easy)

binary search, bitmasks, brute force

Two Subsequences

bitmasks, dp

Password

bitmasks, dp, shortest paths

Mutation

bitmasks, dp, math

Nuclear Fusion

bitmasks, dp

Sweets Game

bitmasks, dfs and similar, dp, games, implementation

Dead Ends

bitmasks, dp

Tournament

bitmasks, brute force, dfs and similar, greedy

Traveling Graph

bitmasks, graph matchings, graphs

Fish

bitmasks, dp, probabilities

A Simple Task

bitmasks, dp, graphs

Looking for Order

bitmasks, dp