Last chance

data structures, flows, graph matchings, graphs, trees

Blog Post Rating

data structures, sortings

Store

data structures

Arkady and Rectangles

data structures

Building Forest Trails

data structures, dsu

Frog Fights

data structures, greedy

Find String in a Grid

data structures, dp, strings, trees

Tree Calendar

brute force, constructive algorithms, data structures, dfs and similar, sortings, trees

Li Hua and Path

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

Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Raining season

data structures, divide and conquer, trees

A task for substrings

data structures, string suffix structures, strings

Maximum Sine

binary search, data structures, number theory

New task

data structures

Gregor and the Two Painters

data structures, divide and conquer, graphs, greedy, math

Fafa and Array

data structures, greedy

Berland Miners

binary search, data structures, dfs and similar, greedy, trees

Rainbow Triples

binary search, data structures, flows, greedy

RC Kaboom Show

binary search, brute force, data structures, geometry, math

Strange Sort

data structures, sortings

May Holidays

data structures, trees

Cannon

data structures, geometry, sortings

Equal Product

data structures, math, number theory, two pointers

Mystic Carvings

data structures

Snowy Mountain

data structures, dfs and similar, graphs, greedy, shortest paths, trees

The Winds of Winter

binary search, data structures

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

Distinctification

data structures, dsu, greedy

Banners

brute force, data structures, dp

Hanger

data structures

Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

Tower Defense

binary search, brute force, data structures

A Stroll Around the Matrix

data structures, greedy, math

Shooting Gallery

data structures, implementation

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Dish Shopping

data structures, divide and conquer

Constrained Tree

constructive algorithms, data structures

AmShZ Wins a Bet

data structures, greedy, hashing

Dreamoon Likes Strings

constructive algorithms, data structures

Min Cost Permutation (Hard Version)

binary search, constructive algorithms, data structures, greedy, math, sortings

Outermost Maximums

data structures, greedy

Andrey's Tree

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

Segments

data structures

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Tavas on the Path

data structures, divide and conquer, trees

Tourists

data structures, sortings

Donkey and Stars

data structures, dp, geometry, math, sortings

Zigzag

data structures

Segment tree or Fenwick?

data structures

Into Blocks (hard version)

data structures

Summer Homework

data structures, math

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Dirty Arkady's Kitchen

data structures, dp, graphs, shortest paths

Two Segments

data structures

Adilbek and the Watering System

data structures, greedy, sortings

Uncle Bogdan and Projections

data structures, geometry, sortings

Design Tutorial: Increase the Constraints

bitmasks, data structures, fft

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Colorful Tree Again

brute force, data structures, trees

Game with Tokens

data structures, games, implementation

Nagini

binary search, data structures

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Squid Game

data structures, dfs and similar, greedy, trees

Organizing a Race

data structures, greedy

Roadside Trees

data structures, dp

Rhombus

brute force, data structures, dp

Equal LCM Subsets

data structures, math, number theory

Forbidden Value

data structures, dp

Qingshan and Daniel

brute force, data structures, greedy, implementation

Shifting Dominoes

data structures, geometry, graphs, trees

Nauuo and Bug

data structures

Bitwise Paradox

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

Omkar and Time Travel

data structures, math

Most Dangerous Shark

data structures, dp, two pointers

Gripping Story

binary search, data structures, sortings

Try Booking

data structures, divide and conquer

Dasha and Photos

brute force, data structures, dp, implementation

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Nim Shortcuts

data structures, games

Coins Exhibition

data structures, dp, math

Location

data structures, dp, math, number theory

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

The Awesomest Vertex

data structures, dfs and similar

Dividing Kingdom

binary search, brute force, data structures

Almost Sorted

bitmasks, data structures, dp

Tiles for Bathroom

data structures, sortings, two pointers

Great City Saint Petersburg

data structures

Sherlock's bet to Moriarty

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees

Decoding of Integer Sequences

*special problem, data structures, implementation

Maximum Waterfall

data structures, dp, graphs, sortings

Magic Tree

*special problem, data structures, dp, trees

Edge Queries

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

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Beautiful fountains rows

data structures

Arkady and a Nobody-men

data structures, dfs and similar, trees

Robots protection

data structures

Exam

data structures, string suffix structures, trees

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

Intervals of Intervals

binary search, data structures, two pointers