Pencils and Boxes

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

Mahmoud and a Dictionary

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

Feed Cats

data structures, dp, sortings

Monocarp and the Set

combinatorics, data structures, math

Permutation Addicts

constructive algorithms, data structures, dfs and similar, dsu, graphs, trees

Messenger Simulator

data structures

Beautiful Mirrors

data structures, dp, math, probabilities

Make It Increasing

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

Mishka and Interesting sum

data structures

The Wu

bitmasks, brute force, data structures

Sausage Maximization

bitmasks, data structures, trees

A Growing Tree

data structures, dfs and similar, trees

Strip

binary search, data structures, dp, two pointers

Sasha and Array

data structures, math, matrices

Three Sequences

constructive algorithms, data structures, greedy, math

Lazy Student

constructive algorithms, data structures, graphs

Multicolored Cars

data structures, implementation

Xor Tree

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

Cashback

data structures, dp, greedy, math

Sum of Progression

brute force, data structures, dp, implementation, math

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Money Transfers

constructive algorithms, data structures, greedy, sortings

Tufurama

data structures

Kirill and Mushrooms

data structures, sortings

Cyclic MEX

data structures, implementation, math, two pointers

Optimal Partition

data structures, dp

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

One Occurrence

data structures, divide and conquer

Non-Decreasing Dilemma

data structures, divide and conquer, math

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

DZY Loves Modification

brute force, data structures, greedy

Petya and Divisors

binary search, data structures, number theory

Portal

brute force, data structures, dp, greedy, implementation

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Tree Construction

data structures, trees

Fountains

binary search, data structures, implementation

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Vasya and a Tree

data structures, trees

Robot Queries

binary search, data structures, dp, implementation

Yet Another Sorting Problem

data structures, math

Watching Fireworks is Fun

data structures, dp, math

Even Path

data structures, implementation

Water Balance

data structures, geometry, greedy

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Duff in the Army

data structures, trees

All Possible Digits

binary search, data structures, greedy, math, number theory

Riverside Curio

data structures, dp, greedy

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

Case of Fugitive

data structures, greedy, sortings

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Report

data structures, sortings

Almost Difference

data structures, math

Collapsing Strings

data structures, strings, trees

Polycarp's phone book

data structures, implementation, sortings

Segment Tree

data structures, dsu, graphs, trees

Playlist

data structures, dsu, implementation, shortest paths

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Kay and Snowflake

data structures, dfs and similar, dp, trees

Missile Silos

data structures, dfs and similar, graphs, shortest paths

The Fair Nut and Rectangles

data structures, dp, geometry

Balanced Playlist

binary search, data structures, implementation

Nested Segments

data structures, sortings

Array Partition

binary search, data structures, greedy, two pointers

Boring Segments

data structures, sortings, trees, two pointers

Maximum Subarray

data structures, dp, greedy, two pointers

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Reverse Sort Sum

constructive algorithms, data structures, greedy, implementation, math, two pointers

Babaei and Birthday Cake

data structures, dp

Cleaning

data structures, dp, greedy, math

Xor-MST

bitmasks, constructive algorithms, data structures

Present

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

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Copying Data

data structures

White Lines

brute force, data structures, dp, implementation, two pointers

Moving Points

data structures, divide and conquer, implementation, sortings

String Reconstruction

data structures, greedy, sortings, strings

Arthur and Table

brute force, data structures, dp, greedy, math, sortings

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

Array Restoration

constructive algorithms, data structures

Physical Education Lessons

data structures, implementation, sortings

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Rescheduling the Exam

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

Tokitsukaze and Meeting

data structures, implementation, math

Psychos in a Line

data structures, implementation

Lena and Matrix

data structures, dp, geometry, shortest paths

Subsegments

data structures, implementation

Big Brush

constructive algorithms, data structures, greedy, implementation

Array Queries

brute force, data structures, dp

Same Sum Blocks (Hard)

data structures, greedy

Multithreading

data structures, greedy, implementation

Cut

binary search, data structures, dp, graphs, number theory, two pointers

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Hanging Hearts

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

R2D2 and Droid Army

binary search, data structures, two pointers

Pairs of Segments

data structures, greedy, sortings, two pointers

The Contest

data structures, dp, greedy