Cool Swap Walk (Hard Version)

constructive algorithms, constructive algorithms, constructive algorithms, implementation, sortings

Cool Swap Walk (Easy Version)

constructive algorithms, implementation, sortings

Shohag Loves Pebae

math, number theory

Shohag Loves Counting (Hard Version)

dp, number theory

Shohag Loves Counting (Easy Version)

combinatorics, dp, math, number theory

Shohag Loves Inversions

combinatorics, dp, implementation, math

Shohag Loves GCD

constructive algorithms, greedy, math, number theory

Shohag Loves XOR (Hard Version)

bitmasks, brute force, math, number theory

Shohag Loves XOR (Easy Version)

bitmasks, brute force, math, number theory

Shohag Loves Strings

constructive algorithms, greedy, implementation, strings

Shohag Loves Mod

constructive algorithms, number theory

Fixing the Expression

implementation

Royal Flush

dp, implementation

Bridge Renovation

brute force, dp, greedy, math, two pointers

Grid Walk

brute force, dp, greedy, math, number theory

Waiting for...

greedy, implementation

Polyathlon

binary search, data structures, hashing, string suffix structures, strings

Galactic Council

flows

Guess One Character

constructive algorithms, implementation, interactive

Alternative Platforms

combinatorics, data structures, fft, math, sortings

Barrels

data structures, greedy, math

Divide OR Conquer

binary search, bitmasks, data structures, dp, implementation

DIY

data structures, geometry, greedy, sortings

Make It Equal

binary search, brute force, greedy, math

Bonus Project

games, greedy

Natlan Exploring

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

Ardent Flames

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

Kachina's Favorite Binary String

dp, greedy, interactive, two pointers

Sharky Surfing

data structures, greedy, two pointers

Superultra's Favorite Permutation

constructive algorithms, greedy, math, number theory

Intercepted Inputs

brute force, implementation

Twice

implementation

Library of Magic

binary search, constructive algorithms, divide and conquer, interactive, math, number theory

XORificator 3000

bitmasks, dp, number theory, two pointers

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

I Love 1543

brute force, implementation, matrices

Anya and 1100

brute force, implementation

Startup

greedy, sortings

Quintomania

implementation

Peak Productivity Forces

constructive algorithms

Go Learn! (Hard Version)

divide and conquer, dp

Go Learn! (Easy Version)

dp, trees

Tree Operations

binary search, brute force, dfs and similar, dp, trees

Monster

binary search, brute force, constructive algorithms, greedy, implementation, math, ternary search

Yet Another Real Number Problem

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

Alya and Permutation

bitmasks, constructive algorithms, math

Everyone Loves Tres

constructive algorithms, greedy, math, number theory

Sliding

implementation, math

Rayan vs. Rayaneh

brute force, dfs and similar, dp, number theory

Simurgh's Watch (Hard Version)

greedy, implementation

Simurgh's Watch (Easy Version)

constructive algorithms, greedy, implementation, sortings

Khayyam's Royal Decree (Hard Version)

combinatorics, dp, math, sortings

Khayyam's Royal Decree (Easy Version)

combinatorics, dp, math, sortings

Permutations Harmony

combinatorics, constructive algorithms, greedy, hashing, math

Darius' Wisdom

constructive algorithms, greedy, implementation, sortings

Trapped in the Witch's Labyrinth

constructive algorithms, dfs and similar, graphs, implementation

Rakhsh's Revival

data structures, greedy, implementation, two pointers

King Keykhosrow's Mystery

brute force, chinese remainder theorem, math, number theory

Sakurako and Chefir

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

Kosuke's Sloth

brute force, math, number theory

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

Sakurako and Water

brute force, constructive algorithms, greedy

Sakurako and Kosuke

constructive algorithms, implementation, math

Peanuts

combinatorics, dp, games, math

Balanced

constructive algorithms, data structures, greedy, implementation, math

Genokraken

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

Trinity

binary search, math, sortings, two pointers

Medians

constructive algorithms, greedy, implementation, math

Circuit

greedy, implementation, math, number theory

Penchick and Even Medians

binary search, constructive algorithms, interactive, probabilities

Penchick and Chloe's Trees

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

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

Penchick and Satay Sticks

brute force, greedy, sortings

Penchick and Modern Monument

constructive algorithms, dp, greedy, math

The Destruction of the Universe (Hard Version)

combinatorics, math

The Destruction of the Universe (Easy Version)

combinatorics, greedy, math

Orangutan Approved Subarrays

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

MEXimize the Score

combinatorics, data structures, dp, greedy, implementation, math

QED's Favorite Permutation

data structures, implementation, sortings

A TRUE Battle

brute force, games, greedy

Minimise Oneness

combinatorics, constructive algorithms, games, math

A Gift From Orangutan

constructive algorithms, greedy, math, sortings

Variance Challenge

flows, graphs, greedy

Message Spread

bitmasks, brute force, combinatorics, dp

Balanced Problem

data structures, dp

Palindrome Everywhere

constructive algorithms, graphs, greedy

Common Generator

brute force, constructive algorithms, math, number theory

Cool Graph

constructive algorithms, data structures, dfs and similar, dsu, graphs, greedy, trees

New Rating

binary search, data structures, dp, greedy

Replacement

constructive algorithms, games, strings

Set

greedy, math

Alice's Adventures in Addition

bitmasks, brute force, dp, implementation

Alice's Adventures in the Rabbit Hole

combinatorics, dfs and similar, dp, games, greedy, math, probabilities, trees

Alice's Adventures in Cards

constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search

Alice's Adventures in Cutting Cake

binary search, dp, greedy, two pointers

Alice's Adventures in Permuting

binary search, implementation, math

Alice's Adventures in ''Chess''

brute force, implementation, math