ICPC Balloons

data structures, implementation

Advantage

data structures, implementation, sortings

Word Game

data structures, implementation

Remove Prefix

data structures, greedy, implementation

Restoring the Duration of Tasks

data structures, greedy, implementation

Meximization

brute force, data structures, greedy, sortings

Planets

data structures, greedy, sortings

Interesting Sum

brute force, data structures, greedy, math, sortings

Hotelier

brute force, data structures, implementation

Block Towers

data structures, greedy, sortings

Nene's Game

binary search, brute force, data structures, games, greedy

Recent Actions

data structures, greedy, implementation, math

Odd Queries

data structures, implementation

Three Indices

brute force, data structures

Minimize Inversions

constructive algorithms, data structures, greedy, implementation, sortings

Also Try Minecraft

data structures, dp, implementation

Mystic Permutation

data structures, greedy

Progressive Square

constructive algorithms, data structures, implementation, sortings

Numbers on Whiteboard

constructive algorithms, data structures, greedy, implementation, math

YetnotherrokenKeoard

data structures, implementation, strings

Powering the Hero (easy version)

data structures, greedy

Berland Music

data structures, greedy, math, sortings

Polycarp Training

data structures, greedy, sortings

Valerii Against Everyone

constructive algorithms, data structures, greedy, sortings

Three Sevens

brute force, data structures, greedy, implementation

Sereja and Suffixes

data structures, dp

A and B and Compilation Errors

data structures, implementation, sortings

Frog Jumps

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

Bad Prices

data structures, implementation

Double Strings

brute force, data structures, strings

Eating Candies

binary search, data structures, greedy, two pointers

Yet Another Card Deck

brute force, data structures, implementation, trees

Train and Queries

data structures, greedy

Powering the Hero (hard version)

data structures, greedy

Odd Swap Sort

data structures, math, sortings

Very Different Array

data structures, greedy, sortings, two pointers

ABBB

brute force, data structures, greedy, strings

Flower City Fence

binary search, data structures, implementation, sortings

Erase First or Second Letter

brute force, combinatorics, data structures, dp, strings

Snacktower

data structures, implementation

Binary Inversions

data structures, greedy, math

Card Deck

data structures, greedy, math

Subsequence Addition (Easy Version)

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

Subtract Operation

data structures, greedy, math, two pointers

Misha and Changing Handles

data structures, dsu, strings

Seating Arrangements (easy version)

data structures, greedy, sortings

Prison Transfer

data structures, implementation

PolandBall and Game

binary search, data structures, games, greedy, sortings, strings

Photo to Remember

*special problem, data structures, dp, implementation

The Festive Evening

data structures, implementation

Another Sorting Problem

data structures, sortings, strings

Same Differences

data structures, hashing, math

XXXXX

brute force, data structures, number theory, two pointers

Corrupted Array

constructive algorithms, data structures, greedy

Remove Two Letters

data structures, greedy, hashing, strings

Three Parts of the Array

binary search, data structures, two pointers

Delete Two Elements

data structures, dp, implementation, math, two pointers

Lecture Sleep

data structures, dp, implementation, two pointers

Matryoshkas

data structures, greedy, sortings

Dora and Search

constructive algorithms, data structures, two pointers

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Stone Age Problem

data structures, implementation

2-Letter Strings

data structures, math, strings

Minimum Notation

data structures, greedy, math, sortings

Chat Order

*special problem, binary search, constructive algorithms, data structures, sortings

Game with string

data structures, implementation, math

Grandma Capa Knits a Scarf

brute force, data structures, greedy, strings, two pointers

Incinerate

binary search, brute force, data structures, implementation, math, sortings

Vika and the Bridge

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

Bad Sequence

data structures, greedy

Stripe

data structures, implementation

Battle Cows

binary search, data structures, greedy

Table Tennis

data structures, implementation

Cells Not Under Attack

data structures, math

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Registration System

data structures, hashing, implementation

Queries about less or equal elements

binary search, data structures, sortings, two pointers

Number of Pairs

binary search, data structures, math, two pointers

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Romantic Glasses

data structures, greedy, math

Find the Different Ones!

binary search, brute force, data structures, dp, dsu, greedy, two pointers

Yet Another Problem About Pairs Satisfying an Inequality

binary search, data structures, dp, greedy, sortings

3SUM Closure

brute force, data structures

Social Network (hard version)

data structures, implementation

Box Fitting

binary search, bitmasks, data structures, greedy

Longest Strike

data structures, greedy, implementation, sortings, two pointers

Balanced Tunnel

data structures, sortings, two pointers

Good Subarrays (Easy Version)

binary search, data structures, schedules, two pointers

Inversion Graph

data structures, dsu, graphs, math

Beautiful Numbers

data structures, implementation, math, two pointers

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Build a Contest

data structures, implementation

Colorful Table

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

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

Game of Credit Cards

data structures, dp, greedy, sortings

Bus of Characters

data structures, greedy, implementation

Recursive Queries

binary search, data structures, dfs and similar

Order Book

data structures, greedy, implementation, sortings

Average Sleep Time

data structures, implementation, math