Trip to the Olympiad

bitmasks, constructive algorithms, greedy, math

Refined Product Optimality

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

Bewitching Stargazer

bitmasks, divide and conquer, dp, math

Fix Flooded Floor

constructive algorithms, dp, graphs

Adrenaline Rush

constructive algorithms

Best Price

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

Maximum modulo equality

data structures, divide and conquer, math, number theory

Three Strings

dp, implementation, strings

Digital string maximization

brute force, greedy, math, strings

MEX Cycle

brute force, constructive algorithms, greedy, implementation

pspspsps

brute force, constructive algorithms, graph matchings, implementation

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

Saraga

greedy, strings

Scrambled Scrabble

brute force, greedy

Medium Demon Problem (easy version)

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

Insane Problem

binary search, greedy, implementation, math, number theory

Sums on Segments

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

Drunken Maze

brute force, dfs and similar, graphs, shortest paths

The Bento Box Adventure

implementation, sortings

Ordered Permutations

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

Shohag Loves GCD

constructive algorithms, greedy, 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

Sharky Surfing

data structures, greedy, two pointers

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

I Love 1543

brute force, implementation, matrices

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

Sakurako, Kosuke, and the Permutation

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

Kousuke's Assignment

data structures, dp, dsu, greedy, math

Sakurako's Field Trip

dp, greedy, 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

Penchick and BBQ Buns

constructive algorithms, math, number theory

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

Black Cells

binary search, brute force, constructive algorithms, greedy

New Game

binary search, brute force, greedy, implementation, sortings, two pointers

Skipping

binary search, dp, graphs, shortest paths

Concatenation of Arrays

constructive algorithms, greedy, math, sortings

Kar Salesman

binary search, greedy, math

Adjust The Presentation (Easy Version)

constructive algorithms, greedy

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

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 Box

combinatorics, math, number theory

Alternating String

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

Dora and C++

math, number theory

Iris and Game on the Tree

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

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

Triple Operations

dp, implementation, 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

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

Absolute Zero

constructive algorithms, greedy, math

Mad MAD Sum

brute force, greedy, math

Two Movies

greedy, math

Increasing Sequence with Fixed OR

bitmasks, constructive algorithms, greedy

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

Magnitude (Easy Version)

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 Infinite Sequence

bitmasks, math

Permutation of Rows and Columns

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

GCD-sequence

greedy, implementation, math, number theory

Sofia and the Lost Operations

constructive algorithms, greedy

Elections

data structures, greedy, implementation, math

Manhattan Permutations

constructive algorithms, data structures, greedy, implementation, math