Long Jumps

dp, graphs

Fair Division

dp, greedy, math

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Building a Fence

dp, greedy, implementation, two pointers

Red and Blue

dp, greedy

LaIS

data structures, dp, greedy

Distinctive Roots in a Tree

data structures, dfs and similar, dp, trees

Sum of Paths

combinatorics, dp, math

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Canine poetry

dp, greedy, strings

Last minute enhancements

dp, greedy

Max Correct Set

bitmasks, dp, math

Last Year's Substring

dp, implementation, strings

Mathematical Expression

constructive algorithms, dp, greedy

Random Events

dp, math, probabilities

Find the Spruce

brute force, dp, implementation

Move and Turn

dp, math

Glass Half Spilled

dp

XOR-ranges

dp, greedy

Forbidden Value

data structures, dp

String and Operations

dp, greedy

Sequence and Swaps

dp, greedy, sortings

Even Harder

dp

Dog Snacks

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

Two Editorials

brute force, dp, greedy, sortings, two pointers

Radio Towers

combinatorics, dp, math

String Equality

dp, greedy, hashing, implementation, strings

Non-Substring Subsequence

dp, greedy, implementation, strings

Communism

bitmasks, dp, trees

Xor Tree

binary search, bitmasks, data structures, divide and conquer, dp, trees

Catching Cheaters

dp, strings

Finding the Vertex

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

Rectangular Polyline

constructive algorithms, dp, geometry

Saving the City

dp, greedy, math, sortings

Black, White and Grey Tree

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

Sum

data structures, divide and conquer, dp, greedy

Extreme Subtraction

constructive algorithms, dp, greedy

INOI Final Contests

combinatorics, dp, fft

Emotional Fishermen

combinatorics, dp, math, two pointers

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Chef Monocarp

dp, flows, graph matchings, greedy, math, sortings

Zero Remainder Sum

dp

Zero-XOR Array

*special problem, dp

Number Deletion Game

*special problem, dp, games, greedy

Yet Another DAG Problem

bitmasks, dfs and similar, dp, flows, graphs, math

Realistic Gameplay

dp, greedy

Lucky Numbers (Hard Version)

dp, greedy

Lucky Numbers (Easy Version)

dp, greedy

Fruit Sequences

binary search, data structures, divide and conquer, dp, two pointers

The Hard Work of Paparazzi

dp

Number of Subsequences

combinatorics, dp, strings

Danger of Mad Snakes

combinatorics, dp, math

Blue and Red of Our Faculty!

divide and conquer, dp

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Minlexes

dp, greedy, implementation, strings

Bargain

combinatorics, dp, math

Swedish Heroes

brute force, dp, implementation

Battle Lemmings

dp, greedy

Pokémon Army (hard version)

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

Pokémon Army (easy version)

constructive algorithms, dp, greedy

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Split

binary search, data structures, dp, greedy

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Cakes for Clones

dp

Bouncing Ball

brute force, dp, implementation

Perform Easily

binary search, brute force, dp, implementation, sortings, two pointers

Subsequences of Length Two

dp, strings

Two Platforms

binary search, dp, sortings, two pointers

Bitwise Magic

dp, math

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Discrete Acceleration

binary search, dp, implementation, math, two pointers

Egor in the Republic of Dagestan

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Discrete Centrifugal Jumps

data structures, dp, graphs

Maximum Product

brute force, dp, greedy, implementation, sortings

Tree Tag

dfs and similar, dp, games, trees

Chess Rush

*special problem, combinatorics, dp, implementation, math

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

Clear the Multiset

data structures, divide and conquer, dp, greedy

Yet Another Segments Subset

data structures, dp, graphs, sortings

Controversial Rounds

binary search, data structures, dp, greedy, two pointers

Colored Rectangles

dp, greedy, sortings

Good Subarrays

data structures, dp, math

Monster Invaders

dp, greedy, implementation

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Boboniu and Jianghu

dp, greedy, sortings, trees

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

ZS Shuffles Cards

combinatorics, dp, math, probabilities

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Omkar and Bed Wars

dp, greedy

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Cyclic Permutations

combinatorics, dp, graphs, math

Directing Edges

dfs and similar, dp, graphs, trees