Raising Bacteria

bitmasks

Preparing Olympiad

bitmasks, brute force

Tavas and SaDDas

bitmasks, brute force, combinatorics, implementation

Second price auction

bitmasks, probabilities

Permutations

bitmasks, divide and conquer, math

Fox And Jumping

bitmasks, brute force, dp, math

Bits

bitmasks, constructive algorithms

Dreamoon and WiFi

bitmasks, brute force, combinatorics, dp, math, probabilities

Fedor and New Game

bitmasks, brute force, constructive algorithms, implementation

Little Pony and Harmony Chest

bitmasks, brute force, dp

Borya and Hanabi

bitmasks, brute force, implementation

The Child and Set

bitmasks, greedy, implementation, sortings

Cunning Gena

bitmasks, dp, greedy, sortings

2048

bitmasks, dp

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Fox and Minimal path

bitmasks, constructive algorithms, graphs, implementation, math

New Year Letter

bitmasks, brute force, dp

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

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math

Undoubtedly Lucky Numbers

bitmasks, brute force, dfs and similar

The Brand New Function

bitmasks

XOR on Segment

bitmasks, data structures

Table

bitmasks, combinatorics, dp, math

Array

bitmasks, implementation, two pointers

LLPS

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

PFAST Inc.

bitmasks, brute force, graphs

Lucky Numbers (easy)

binary search, bitmasks, brute force

Sweets Game

bitmasks, dfs and similar, dp, games, implementation

Tournament

bitmasks, brute force, dfs and similar, greedy

Fish

bitmasks, dp, probabilities

Looking for Order

bitmasks, dp