Goblin

dfs and similar, dp, dsu, greedy, math

Flower Boy

binary search, dp, greedy, two pointers

Numbers and Strings

binary search, brute force, dfs and similar, dp, implementation, math

Unpleasant Strings

binary search, dp, greedy, strings

Move to the End

brute force, data structures, dp, greedy, implementation

Maximize Nor

bitmasks, data structures, dp, implementation, sortings

Shoo Shatters the Sunshine

combinatorics, dp, trees

Kia Bakes a Cake

data structures, dp, greedy, trees

Lost Luggage

dp, flows

Clearing the Snowdrift

data structures, dfs and similar, dp, greedy

Baggage Claim

combinatorics, dfs and similar, dp, dsu, graphs, implementation, math, trees

Wonderful XOR Problem

bitmasks, combinatorics, dp, fft, math

Wonderful City

dp, implementation

Gleb and Boating

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

Igor and Mountain

binary search, brute force, dp

Team Training

dp, greedy, sortings

Pushing Balls

brute force, dp, implementation

Key of Like (Hard Version)

dp, math, probabilities

Key of Like (Easy Version)

dp, games, math, probabilities

Canteen (Hard Version)

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

Weapon Upgrade

*special problem, *special problem, dp

Color the Arrows

*special problem, *special problem, dp, dp

Zebra-like Numbers

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy, math

Even String

brute force, combinatorics, dp, math, strings

Disappearing Permutation

dfs and similar, dp, dsu, graphs, greedy, implementation

Serval and The Formula

bitmasks, constructive algorithms, dp, greedy

Turtle and Nediam 2

dp, greedy

Wish Upon a Satellite (Hard Version)

data structures, dp

Wish Upon a Satellite (Easy Version)

dp, games

Blossom

binary search, combinatorics, dp, implementation, math, two pointers

Quantifier

combinatorics, dp, implementation

Math Division

bitmasks, dp, math, probabilities

Arithmetic Exercise

*special problem, data structures, dp, greedy

Alice, Bob, And Two Arrays

*special problem, data structures, dp, games

Scammy Game Ad

dp, greedy, implementation

AND x OR

bitmasks, constructive algorithms, dp

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

XOR Matrix

bitmasks, combinatorics, dp, implementation, math

Equalization

bitmasks, brute force, dp, graphs, math

Game With Triangles: Season 2

dp, geometry

Do You Love Your Hero and His Two-Hit Multi-Target Attacks?

binary search, brute force, constructive algorithms, dp, geometry, greedy, math

LeaFall

combinatorics, dp, probabilities, trees

Infinite Sequence (Hard Version)

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

Infinite Sequence (Easy Version)

bitmasks, brute force, dp, implementation, math

Trapmigiano Reggiano

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

Friends and Pizza

bitmasks, divide and conquer, dp, fft

Tree Jumps

dfs and similar, dp, trees

Beautiful Sequence

combinatorics, dp, greedy, two pointers

Morse Code

dp, sortings, trees

Two Large Bags

brute force, dp, greedy, sortings

Curse

constructive algorithms, dp, math

Club of Young Aircraft Builders (hard version)

combinatorics, dp, math

Club of Young Aircraft Builders (easy version)

combinatorics, dp, math

Bitwise Slides

bitmasks, combinatorics, dp, math

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Bro Thinks He's Him

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

Skibidus and Fanum Tax (easy version)

binary search, dp, greedy

We Be Summing

binary search, data structures, dp, two pointers

Eating

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

Remove the Ends

brute force, constructive algorithms, dp, greedy

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

Galaxy Generator

bitmasks, combinatorics, dp

Traveling Salescat

constructive algorithms, dp, geometry, graphs, greedy, math, sortings

Balanced Tree

dfs and similar, dp, graphs, greedy, trees

Kevin and Nivek

divide and conquer, dp

Kevin and Binary String (Hard Version)

data structures, dp

Kevin and And

bitmasks, brute force, dp, greedy, math, sortings

Kevin and Puzzle

2-sat, combinatorics, dp

Bugged Sort

dp, greedy, sortings

Multiplicative Arrays

combinatorics, dp, number theory

Formation

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

Another Exercise on Graphs (hard version)

binary search, dfs and similar, dp, dsu, graphs, shortest paths, sortings

Another Exercise on Graphs (Easy Version)

binary search, brute force, dp, dsu, graphs, shortest paths, sortings

Xor of Median (Hard Version)

bitmasks, brute force, combinatorics, dp, math

Xor of Median (Easy Version)

bitmasks, brute force, combinatorics, dp, math

Nested Segments

combinatorics, dfs and similar, dp, dsu, math

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

Resourceful Caterpillar Sequence

dfs and similar, dp, games, graphs, greedy, trees

Bewitching Stargazer

bitmasks, divide and conquer, dp, math

Tender Carpenter

dp, geometry, greedy, math

Managing Cluster

dp, graphs, math, trees

Fix Flooded Floor

constructive algorithms, dp, graphs

Snakes

bitmasks, dp, dsu, graphs

Tree Destruction

dfs and similar, dp, trees

Three Strings

dp, implementation, strings

Uninteresting Number

brute force, dp, math

Shift + Esc

brute force, dp

Kevin and Strange Operation

data structures, dp

Kevin and Matrices

brute force, combinatorics, dp, math

Kevin and Math Class

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

Missing Separators

dp, sortings, string suffix structures, strings

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

Medium Demon Problem (hard version)

dfs and similar, dp, dsu, graphs, implementation, trees

Nim

bitmasks, brute force, combinatorics, dp, games, greedy, implementation, shortest paths