Balancing Weapons

binary search, brute force, data structures, math, two pointers

The Boss's Identity

binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings

Case of a Top Secret

binary search, implementation, math

Smooth Sailing (Easy Version)

binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths

Lottery

binary search, brute force, greedy, math, two pointers

Game with Cards

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

Group Photo

binary search, data structures, implementation, two pointers

Hossam and Range Minimum Query

binary search, bitmasks, data structures, hashing, probabilities, strings, trees

Controversial Rounds

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

Summer Earnings

binary search, bitmasks, brute force, geometry, sortings

Strange Function

binary search, data structures, dp, greedy

Cow and Treats

binary search, combinatorics, dp, greedy, implementation, math

Expected diameter of a tree

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

Nastya and King-Shamans

binary search, data structures

Nanosoft

binary search, data structures, dp, implementation

Yurii Can Do Everything

binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers

Strange Shuffle

binary search, brute force, constructive algorithms, interactive

Sanae and Giant Robot

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

Joking (Easy Version)

binary search, constructive algorithms, interactive, ternary search

Johnny and Megan's Necklace

binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Bear and Bowling 4

binary search, data structures, divide and conquer, geometry, ternary search

Cheap Robot

binary search, dsu, graphs, shortest paths, trees

GukiZ and GukiZiana

binary search, data structures, implementation

Partition Game

binary search, data structures, divide and conquer, dp

Sign on Fence

binary search, constructive algorithms, data structures

Hack it!

binary search, constructive algorithms, math

Sum of Digits of Sums

*special problem, binary search, data structures

Looking for Owls

binary search, data structures, geometry, hashing, sortings

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Winning Strategy

binary search, graphs, math, shortest paths

Delivering Carcinogen

binary search, geometry

Gripping Story

binary search, data structures, sortings

Two Arrays

binary search, games, graph matchings

Startup Funding

binary search, constructive algorithms, data structures, probabilities, two pointers

Buses and People

binary search, data structures, sortings

Fire in the City

binary search, data structures

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Students Initiation

binary search, flows, graphs

Exam Cheating

binary search, dp

Lihmuf Balling

binary search, brute force, math

Michael and Charging Stations

binary search, dp, greedy

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Prefix Sums

binary search, brute force, combinatorics, math, matrices

Liar

binary search, dp, hashing, string suffix structures

Two Tanks

binary search, dp, implementation, math

Gotta Go Fast

binary search, dp

Unique Array

binary search, data structures, divide and conquer, dp, greedy

Construct a tree

binary search, constructive algorithms, dfs and similar, graphs, greedy, trees

Morse Code

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

Cookies

binary search, data structures, dfs and similar, dp, games, trees

Rest In The Shades

binary search, geometry

Choose a Square

binary search, data structures, sortings

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

Vasya and Maximum Profit

binary search, constructive algorithms, data structures, dp, dsu

Array Equalizer

binary search, greedy, implementation, math, number theory, sortings, two pointers

MST Company

binary search, graphs

Sonya and Ice Cream

binary search, data structures, dp, greedy, shortest paths, trees

Blocking Chips

binary search, constructive algorithms, dfs and similar, greedy, trees

Labyrinth

binary search, dsu, greedy

Card Game

binary search, flows, graphs

April Fools' Problem (medium)

binary search, flows, graphs

Distance Tree (easy version)

binary search, data structures, dfs and similar, graphs, shortest paths, trees

The penguin's game

binary search, constructive algorithms, interactive

Good Subarrays (Hard Version)

binary search, data structures, dp, two pointers

Trucks and Cities

binary search, dp

Simple Skewness

binary search, math, ternary search

Josuke and Complete Graph

binary search, brute force, data structures, math, number theory

RBS

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

Split the Tree

binary search, data structures, dp, greedy, trees

Bracket Cost

binary search, data structures, divide and conquer, dp, greedy, strings

The Hidden Pair (Easy Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

Flying Sort (Hard Version)

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

Vika and Wiki

binary search, bitmasks, combinatorics, divide and conquer, dp, math

Spanning Tree Queries

binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees

FTL

binary search, dp

Prime Gift

binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers

Session in BSU

binary search, dfs and similar, dsu, graph matchings, graphs

Reverse and Swap

binary search, bitmasks, data structures

Minimum Array

binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers

Network Coverage

binary search, constructive algorithms, data structures, greedy

Korney Korneevich and XOR (hard version)

binary search, brute force, dp, greedy, two pointers

Expected Damage

binary search, combinatorics, probabilities

Make It Connected

binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Red-Blue Operations (Hard Version)

binary search, constructive algorithms, greedy, implementation, math

Omkar and Landslide

binary search, constructive algorithms, data structures, greedy, math

Editorial for Two

binary search, data structures, greedy, implementation

Complicated Computations

binary search, data structures, two pointers

Fruit Sequences

binary search, data structures, divide and conquer, dp, two pointers

Voting (Hard Version)

binary search, data structures, greedy

Blood Cousins Return

binary search, data structures, dfs and similar, dp, sortings

Dogecoin

*special problem, *special problem, binary search, data structures

Archer's Shot

binary search, geometry, math, two pointers

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Building an Amusement Park

binary search, geometry

Sweets for Everyone!

binary search, greedy, implementation

Biathlon Track

binary search, brute force, constructive algorithms, data structures, dp

Vanya and Balloons

binary search, brute force, dp, implementation

Tourist

binary search, data structures, dp