Towers

dp, greedy, two pointers

Voting (Easy Version)

data structures, dp, greedy

Random Task

binary search, bitmasks, combinatorics, dp, math

Roma and Poker

dp, graphs

Match & Catch

dp, string suffix structures, strings

Maximum Weight Subset

dp, trees

Partition Game

binary search, data structures, divide and conquer, dp

Tree Queries (Easy Version)

brute force, constructive algorithms, dfs and similar, dp, greedy, trees

Wizards and Huge Prize

dp, math, probabilities

Love-Hate

bitmasks, brute force, dp, probabilities

Yaroslav and Two Strings

combinatorics, dp

Teodor is not a liar!

data structures, dp

LIS of Sequence

data structures, dp, greedy, hashing, math

Cut Substrings

combinatorics, dp, hashing, strings, two pointers

Minesweeper 1D

dp, implementation

Kim's Quest

bitmasks, combinatorics, dp

Combinatorics Problem

brute force, combinatorics, dp

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

LionAge II

dp

Partial Teacher

dp, graphs, greedy, implementation

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

Fibonacci army

*special problem, dp

PLEASE

combinatorics, dp, implementation, math, matrices

Array GCD

dp, greedy, number theory

Stripe 2

binary search, dp, sortings

Nastya and Unexpected Guest

dfs and similar, dp, graphs, shortest paths

Birds

dp

Sums of Digits

dp, greedy, implementation

Plus and xor

dp, greedy, math

Sorting Books

data structures, dp, greedy

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Star MST

combinatorics, dp, graph matchings, math

Steps to One

dp, math, number theory, probabilities

Coprocessor

dfs and similar, dp, graphs, greedy

Game on Sum (Hard Version)

combinatorics, dp, games, math

Phoenix and Berries

brute force, dp, greedy, math

Helga Hufflepuff's Cup

dp, trees

Extreme Extension

dp, greedy, math, number theory

Dog Snacks

binary search, dfs and similar, dp, greedy, trees

Field expansion

brute force, dp, meet-in-the-middle

Assimilation IV

combinatorics, dp, math, probabilities, two pointers

Palindrome

constructive algorithms, dp

Valid Bitonic Permutations

combinatorics, dp, implementation, math, number theory

Binary Table

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

Running with Obstacles

*special problem, data structures, dp, greedy

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Mahmoud and Ehab and yet another xor task

bitmasks, dp, math, matrices

Table Compression

dfs and similar, dp, dsu, graphs, greedy

AlgoRace

dp, shortest paths

Sum

data structures, divide and conquer, dp, greedy

Tree Queries (Hard Version)

constructive algorithms, dfs and similar, dp, greedy, trees

Explosions?

binary search, data structures, dp, greedy, math

Two out of Three

dp

Short Colorful Strip

combinatorics, dfs and similar, dp

Vlad and the Nice Paths (easy version)

combinatorics, dp, math

Optimal Insertion

data structures, divide and conquer, dp, greedy, sortings

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Compress String

dp, strings

Another Sith Tournament

bitmasks, dp, math, probabilities

Photo Processing

binary search, dp

Palindrome-less Arrays

combinatorics, divide and conquer, dp

Lucky Subsequence

combinatorics, dp, math

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Two Merged Sequences

dp, greedy

Three Religions

dp, implementation, strings

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Inverse Coloring

combinatorics, dp, math

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Shooting Gallery

dp, probabilities

William The Oblivious

bitmasks, data structures, dp, matrices

Transitive Graph

dfs and similar, dp, dsu, graphs, implementation

Game

brute force, dp, implementation

Alternating Tree

combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees

Prefix Function Queries

dfs and similar, dp, hashing, string suffix structures, strings, trees

Lizards and Basements 2

brute force, dp

Ela and the Wiring Wizard

brute force, dp, graphs, greedy, implementation, shortest paths

Pig and Palindromes

combinatorics, dp

Pluses everywhere

combinatorics, dp, math, number theory

Nastia Plays with a Tree

constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Beaver Game

dp, games, number theory

Broken robot

dp, math, probabilities

Digits

dp, math, number theory

Rock Is Push

binary search, dp

Police Station

dp, graphs, shortest paths

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Yet another 2D Walking

dp

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Sereja and Subsequences

data structures, dp

Wrong Answer on test 233 (Easy Version)

dp

Two Bracket Sequences

dp, strings, two pointers

Dreamoon and Strings

dp, strings

Little Elephant and LCM

binary search, combinatorics, dp, math

Inversions problem

brute force, dfs and similar, dp, meet-in-the-middle

Cards

combinatorics, dp, math, number theory, probabilities

Selling Souvenirs

binary search, dp, greedy, ternary search

Equidistant Vertices

brute force, combinatorics, dfs and similar, dp, trees

Destroy it!

dp, implementation, sortings

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees