AghaBalaSar and Hamed

data structures, dp, trees

Deque Malfunction

binary search, data structures, dp, greedy

Plus Minus Tree

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

Beaver's Jumping Track (Hard Version)

data structures, dp, matrices

Beaver's Jumping Track (Easy Version)

data structures, dp, matrices

Busy Beaver

brute force, data structures, divide and conquer, dp, greedy, implementation, sortings

Nightcrawler

data structures, dfs and similar, dp, greedy, greedy, sortings, trees

Paths on a Grid

data structures, dp, hashing

Yura and Deadlines

data structures, dp

Masha and the Garland

data structures, dp, greedy, implementation, math, number theory, strings

Summer Vacation

data structures, data structures, data structures, dp, dp, probabilities, trees

Paint the Array

data structures, dp, greedy

Stripe, Token and Two Players

data structures, dp, games

Roadworks

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

Deconstruction Tree

combinatorics, data structures, dp, graphs, trees

It Just Keeps Going Sideways

binary search, data structures, data structures, dp, dp, greedy, greedy, math, math

It All Went Sideways

binary search, data structures, dp, greedy

Zhily and Barknights

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

Hanabi

binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy

Where's My Water?

data structures, divide and conquer, dp, math

Christmas Tree Un-decoration

data structures, dp, trees

Simons and Dividing the Rhythm

combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings

Simons and Beating Peaks

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

Lost Civilization (Hard Version)

data structures, dp

Sum of MEX

*special problem, combinatorics, data structures, dp, math

Fuzzy Concatenation (Hard version)

binary search, bitmasks, data structures, dp, greedy, string suffix structures

Double Bracket Sequence

data structures, dp, expression parsing, flows, greedy, strings

Idiot First Search and Queries

binary search, data structures, dp, graphs, trees

Again Trees... (hard version)

bitmasks, data structures, dfs and similar, dp, fft, trees

Zhora the Vacuum Cleaner

data structures, dfs and similar, dp, greedy, implementation, sortings, trees

Doors and Keys

brute force, data structures, dp

BattleCows 2

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

Short Garland

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

Insolvable Disks

data structures, dp, greedy, math

Blackslex and Plants

bitmasks, data structures, dp, implementation, math

deCH OR Dations

bitmasks, data structures, dp, hashing, probabilities

Remove at the lowest cost

data structures, dfs and similar, dp, dsu, greedy, implementation, trees

Fibonacci Paths

data structures, dp, graphs, sortings

Secret Message

data structures, dp, greedy, trees

Shiori Miyagi and Maximum Array Score

binary search, data structures, dp, sortings

Rae Taylor and Trees (hard version)

binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees

Rae Taylor and Trees (easy version)

binary search, data structures, dp, dsu, greedy, implementation, trees

Binary Strings and Blocks

combinatorics, data structures, dp

Mukhammadali and the Smooth Array

data structures, dp

Chain Prefix Rank (Hard Version)

binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees

Locked Out

binary search, data structures, dp, greedy

Rectangles

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

Adjusting Drones

binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings

Best Time to Buy and Sell Stock

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

Limited Edition Shop

data structures, dp

Looking at Towers (difficult version)

combinatorics, data structures, dp

Inversion Graph Coloring (Hard Version)

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

Inversion Graph Coloring (Easy Version)

combinatorics, data structures, dp, greedy, two pointers

Against the Difference

data structures, dp

Flint and Steel

data structures, dp, graphs

Wafu!

bitmasks, brute force, data structures, dfs and similar, dp, math

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Submedians (Easy Version)

binary search, data structures, dp, greedy, math

Big Wins! (easy version)

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

Traffic Lights

brute force, data structures, divide and conquer, dp, graphs, greedy, shortest paths

Ice Baby

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

Red Light, Green Light (Hard version)

binary search, brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Neo's Escape

binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation

Cycling (Hard Version)

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

Move to the End

brute force, data structures, dp, greedy, implementation

Maximize Nor

bitmasks, data structures, dp, implementation, sortings

Kia Bakes a Cake

data structures, dp, greedy, trees

Clearing the Snowdrift

data structures, dfs and similar, dp, greedy

Gleb and Boating

brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths

Canteen (Hard Version)

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

Wish Upon a Satellite (Hard Version)

data structures, dp

Arithmetic Exercise

*special problem, data structures, dp, greedy

Alice, Bob, And Two Arrays

*special problem, data structures, dp, games

Another Folding Strip

combinatorics, constructive algorithms, data structures, divide and conquer, dp, greedy, math

Binary Subsequence Value Sum

combinatorics, data structures, dp, fft, math, matrices

Infinite Sequence (Hard Version)

bitmasks, brute force, constructive algorithms, data structures, dp, implementation, math

Trapmigiano Reggiano

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

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Bro Thinks He's Him

combinatorics, data structures, divide and conquer, dp, math, matrices

We Be Summing

binary search, data structures, dp, two pointers

Eating

binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers

Counting Is Not Fun (Easy Version)

combinatorics, data structures, dfs and similar, dp, dsu, graphs, hashing, implementation, math, trees

Triangle Tree

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

Remove Exactly Two

brute force, data structures, dfs and similar, dp, graphs, greedy, sortings, trees

Kevin and Binary String (Hard Version)

data structures, dp

Formation

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

Unique Median

binary search, brute force, combinatorics, data structures, divide and conquer, dp

Affectionate Arrays (Hard Version)

data structures, dp, graphs, greedy, math, shortest paths, two pointers

Affectionate Arrays (Easy Version)

data structures, dp, greedy

Earnest Matrix Complement

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

Kevin and Strange Operation

data structures, dp

Kevin and Math Class

brute force, data structures, divide and conquer, dp, implementation, math, trees

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

Sums on Segments

binary search, brute force, data structures, dp, greedy, math

Two Subarrays

data structures, dp, implementation, matrices

Bottle Arrangement

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

Divide OR Conquer

binary search, bitmasks, data structures, dp, implementation

Natlan Exploring

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

Sakurako and Chefir

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

Kousuke's Assignment

data structures, dp, dsu, greedy, math