Fix Flooded Floor

constructive algorithms, dp, graphs

Adrenaline Rush

constructive algorithms

Maximum modulo equality

data structures, divide and conquer, math, number theory

Three Strings

dp, implementation, strings

Kevin and Competition Memories

binary search, brute force, data structures, greedy, sortings, two pointers

Move Back at a Cost

binary search, data structures, greedy, sortings

Mirror Maze

brute force, dfs and similar, graphs, implementation

Saraga

greedy, strings

Scrambled Scrabble

brute force, greedy

Medium Demon Problem (easy version)

dfs and similar, graph matchings, graphs, implementation, trees

Competitive Fishing

greedy

Drunken Maze

brute force, dfs and similar, graphs, shortest paths

Ordered Permutations

bitmasks, combinatorics, constructive algorithms, greedy, math, two pointers

Shohag Loves GCD

constructive algorithms, greedy, math, number theory

Shohag Loves XOR (Hard Version)

bitmasks, brute force, math, number theory

Bridge Renovation

brute force, dp, greedy, math, two pointers

DIY

data structures, geometry, greedy, sortings

Bonus Project

games, greedy

Kachina's Favorite Binary String

dp, greedy, interactive, two pointers

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

Yet Another Real Number Problem

binary search, data structures, divide and conquer, greedy, implementation, math

Alya and Permutation

bitmasks, constructive algorithms, math

Darius' Wisdom

constructive algorithms, greedy, implementation, sortings

Trapped in the Witch's Labyrinth

constructive algorithms, dfs and similar, graphs, implementation

Kosuke's Sloth

brute force, math, number theory

Sakurako, Kosuke, and the Permutation

brute force, data structures, dfs and similar, dsu, graphs, greedy, math

Sakurako's Field Trip

dp, greedy, two pointers

Genokraken

constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers

Trinity

binary search, math, sortings, two pointers

Penchick and Desert Rabbit

binary search, data structures, dfs and similar, dp, dsu, greedy, implementation, two pointers

QED's Favorite Permutation

data structures, implementation, sortings

New Rating

binary search, data structures, dp, greedy

Alice's Adventures in Cutting Cake

binary search, dp, greedy, two pointers

Alice's Adventures in Permuting

binary search, implementation, math

The Endspeaker (Easy Version)

binary search, dp, graphs, greedy, implementation, two pointers

Add Zeros

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

Action Figures

binary search, brute force, constructive algorithms, data structures, greedy, implementation

Attribute Checks

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

Skipping

binary search, dp, graphs, shortest paths

Gerrymandering

dp, implementation

Connect the Dots

brute force, dp, dsu, graphs, math, trees

Bitwise Balancing

bitmasks, hashing, implementation, math, schedules, ternary search

Tree Pruning

brute force, dfs and similar, greedy, sortings, trees

Cards Partition

2-sat, brute force, greedy, implementation, math

Rendez-vous de Marian et Robin

dfs and similar, graphs, shortest paths

Robert Hood and Mrs Hood

brute force, data structures, greedy, sortings

Password Cracking

constructive algorithms, interactive, strings

Message Transmission Error (hard version)

hashing, string suffix structures, strings, two pointers

Message Transmission Error (easy version)

brute force, strings

Firefly's Queries

bitmasks, data structures, flows, math

Klee's SUPER DUPER LARGE Array!!!

binary search, math, ternary search

Satyam and Counting

geometry, math

Sakurako's Task

binary search, greedy, math, number theory

Sakurako's Box

combinatorics, math, number theory

Alternating String

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

Dora and C++

math, number theory

Iris and the Tree

brute force, data structures, dfs and similar, dsu, math, trees

Iris and Game on the Tree

constructive algorithms, dfs and similar, games, graphs, greedy, trees

Lazy Narek

dp, implementation, strings

Colored Portals

binary search, brute force, data structures, graphs, greedy, implementation, shortest paths

Turtle and a MEX Problem (Easy Version)

greedy, math

Guess The Tree

binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees

Photoshoot for Gorillas

combinatorics, data structures, greedy, math

Ruler (hard version)

binary search, interactive, ternary search

Ruler (easy version)

binary search, interactive

Expected Median

combinatorics, math

Maximize the Root

binary search, dfs and similar, dp, greedy, trees

Decode

combinatorics, data structures, implementation, math

Fun

binary search, brute force, combinatorics, math, number theory

Squaring

brute force, constructive algorithms, greedy, implementation, math, number theory

Bouquet (Hard Version)

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

Hungry Games

binary search, dp, two pointers

Light Switches

implementation, math

Novice's Mistake

brute force, constructive algorithms, implementation, math, strings

Grid Puzzle

bitmasks, brute force, dp, greedy, implementation

Mad MAD Sum

brute force, greedy, math

Two Movies

greedy, math

World is Mine

dp, games

Beautiful Array

greedy, math, number theory, sortings

Mathematical Problem

brute force, dp, greedy, implementation, math, two pointers

Maximize the Largest Component (Easy Version)

brute force, data structures, dfs and similar, dsu, graphs, implementation

D-Function

combinatorics, math, number theory

Final Boss

binary search, data structures

Magnitude (Hard Version)

combinatorics, dp, greedy, math

Swap Dilemma

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

Have Your Cake and Eat It Too

binary search, brute force, greedy, implementation

Beauty of the mountains

brute force, data structures, implementation, math, number theory

Turtle and an Incomplete Sequence

bitmasks, brute force, constructive algorithms, greedy, implementation, math

Permutation of Rows and Columns

constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings

GCD-sequence

greedy, implementation, math, number theory

Fixing a Binary String

bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings

Elections

data structures, greedy, implementation, math

Job Interview

binary search, dp, greedy, implementation, two pointers

Paint the Tree

brute force, dfs and similar, dp, greedy, shortest paths, trees

Money Buys Happiness

dp

Ingenuity-2

constructive algorithms, greedy, implementation

Beautiful Triple Pairs

combinatorics, data structures

Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

XOUR

data structures, dsu, sortings

Circle Perimeter

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