Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Beaver

data structures, dp, greedy, hashing, strings, two pointers

New School

binary search, data structures, dp, greedy, implementation, sortings

Cinema Cashier

dp, implementation

Cards

combinatorics, dp, math, number theory, probabilities

Fence

dp

Korney Korneevich and XOR (hard version)

binary search, brute force, dp, greedy, two pointers

Array Beauty

dp

Word Cut

dp

Yet Another Array Counting Problem

binary search, data structures, divide and conquer, dp, flows, math, trees

Towers

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

Railguns

brute force, dfs and similar, dp, graphs

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

Node Pairs

dp, graphs, math, number theory

The Maximum Subtree

dfs and similar, dp, graphs, trees

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Vasya and Magic Matrix

dp, math, probabilities

The Maths Lecture

dp, implementation

Phone Number

dp

Numbers

combinatorics, dp

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

Greg and Friends

combinatorics, dp, graphs, shortest paths

IT Restaurants

dfs and similar, dp, trees

Maximum Monogonosity

brute force, dp, math

Substitutes in Number

dp

Chopping Carrots (Hard Version)

brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers

Light Bulbs (Easy Version)

brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees

Insertion Sort

data structures, dp, implementation, math

You Are Given a Tree

data structures, dp, trees

Quantifier Question

dfs and similar, dp, graphs, math

Tree

binary search, dp, trees

Yet Another Inversions Problem

combinatorics, data structures, dp, implementation, math, number theory

On the Bench

combinatorics, dp

Bots

combinatorics, dp, math, number theory

Small Permutation Problem (Easy Version)

brute force, combinatorics, dp, math

Changing Brackets

constructive algorithms, data structures, dp, greedy

Memory and Scores

combinatorics, dp, math

Camels

dp

Salazar Slytherin's Locket

bitmasks, dp

Vlad and the Nice Paths (hard version)

binary search, combinatorics, data structures, dp, math, two pointers

AND Segments

bitmasks, combinatorics, data structures, dp, two pointers

Egor in the Republic of Dagestan

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

Tournament

brute force, dp, greedy

Non-Intersecting Subpermutations

combinatorics, dp, implementation, math

Sorting Pancakes

dp

Special Matrices

combinatorics, dp

Long Way Home

data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths

Helping Hiasat

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

Presents in Bankopolis

dp, graphs, shortest paths

Natasha, Sasha and the Prefix Sums

combinatorics, dp, math, number theory

EKG

dfs and similar, dp

Inversion Expectation

dp, math, probabilities

LaIS

data structures, dp, greedy

Ant Man

dp, graphs, greedy

Square-free division (hard version)

data structures, dp, greedy, math, number theory, two pointers

Turtles

dp, matrices

Yet Another Segments Subset

data structures, dp, graphs, sortings

Treeland Tour

data structures, dfs and similar, dp, trees

Cactus

data structures, dfs and similar, dp, graphs, trees

Arthur and Brackets

dp, greedy

Unique Occurrences

data structures, dfs and similar, divide and conquer, dp, dsu, trees

Tenzing and Triangle

data structures, dp, geometry, greedy, math

Crypto Lights

combinatorics, dp, math, probabilities

Animal Observation (easy version)

data structures, dp

Vanya and Treasure

data structures, dp, graphs, shortest paths

e-Government

data structures, dfs and similar, dp, strings, trees

There Should Be a Lot of Maximums

brute force, data structures, dfs and similar, dp, trees, two pointers

Permutation Sum

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

Changing a String

dp

Flipping Range

constructive algorithms, dp, greedy, number theory

Modular Sequence

brute force, constructive algorithms, dp, graphs, greedy, math, number theory

Demiurges Play Again

dfs and similar, dp, math, trees

Grouped Carriages

binary search, data structures, dp, flows, greedy

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Multitest Generator

brute force, dp

Jellyfish and EVA

dp, graphs, greedy, math, probabilities

Max to the Right of Min

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

Train

dp, games, greedy

Two Editorials

brute force, dp, greedy, sortings, two pointers

New Year Letter

bitmasks, brute force, dp

Genius

bitmasks, dp, graphs, number theory

Palindromes

dp, strings

Devu and Birthday Celebration

combinatorics, dp, math

The Unbearable Lightness of Weights

dp, math

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

Vladik and cards

binary search, bitmasks, brute force, dp

Sum Balance

bitmasks, dfs and similar, dp, graphs

New Year and Old Subsequence

data structures, divide and conquer, dp, matrices

Paint Charges

data structures, dp, greedy, math

FTL

binary search, dp

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

Phone Talks

*special problem, dp, sortings

Balance Addicts

combinatorics, dp, math, two pointers

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

Infinite Card Game

binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers

Фото на память - 2 (round version)

dp, greedy

Vika and Wiki

binary search, bitmasks, combinatorics, divide and conquer, dp, math

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Flying Sort (Hard Version)

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