To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Game on Tree

implementation, math, probabilities, trees

Make It Increasing

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

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Great Vova Wall (Version 2)

data structures, implementation

Sum of Remainders

implementation, math, number theory

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Priority Queue

combinatorics, dp, implementation, math, ternary search

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Mike and Frog

brute force, greedy, implementation, math

Bananas in a Microwave

dfs and similar, dp, graphs, implementation

Not Escaping

data structures, dp, implementation, shortest paths, two pointers

Count Seconds

brute force, constructive algorithms, dp, graphs, implementation, math

Two Types of Spells

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

Water Level

brute force, graphs, greedy, implementation, math

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Let Them Slide

data structures, implementation

Valid Bitonic Permutations

combinatorics, dp, implementation, math, number theory

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Symmetree

dfs and similar, hashing, implementation, trees

Three Religions

dp, implementation, strings

Ela and the Wiring Wizard

brute force, dp, graphs, greedy, implementation, shortest paths

Lights

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation

The Maths Lecture

dp, implementation

Train Maintenance

brute force, data structures, implementation

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Serval and Shift-Shift-Shift

bitmasks, brute force, constructive algorithms, implementation

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

Vlad and Avoiding X

bitmasks, brute force, dfs and similar, dp, implementation

Divisors

brute force, dfs and similar, implementation, number theory

Brackets in Implications

constructive algorithms, greedy, implementation, math

Vitaly and Advanced Useless Algorithms

dp, greedy, implementation

Appleman and a Sheet of Paper

data structures, implementation

Gaining Rating

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

Swapping Characters

brute force, hashing, implementation, strings

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Hospital Queue

binary search, graphs, greedy, implementation

Bear and Polynomials

hashing, implementation, math

Mischievous Shooter

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

Fancy Stack

combinatorics, dp, implementation

Shifting

implementation

Largest Beautiful Number

greedy, implementation

Snake

bitmasks, dfs and similar, graphs, implementation

Excitation of Atoms

greedy, implementation

Arthur and Questions

greedy, implementation, math, ternary search

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Huge Strings

bitmasks, brute force, dp, implementation, strings

Furlo and Rublo and Game

games, implementation, math

Evaluate It and Back Again

constructive algorithms, implementation, math

Dima and Magic Guitar

brute force, implementation, math

BinCoin

binary search, divide and conquer, hashing, implementation, probabilities, trees

Award Ceremony

greedy, implementation

Running Over The Bridges

greedy, implementation, math

Ksenia and Pawns

dfs and similar, graphs, implementation, trees

Knitting Batik

implementation, math

Solitaire

brute force, implementation

How Many Squares?

implementation

Automatic Door

implementation

Maze 1D

binary search, greedy, implementation

Printer

binary search, data structures, implementation, sortings

Colorado Potato Beetle

dfs and similar, implementation

Tests Renumeration

greedy, implementation

Geometrical problem

implementation

Bowls

geometry, implementation

Battlefield

geometry, graphs, implementation, shortest paths

Greedy Elevator

data structures, implementation

Item World

brute force, implementation, sortings

Suns and Rays

dfs and similar, implementation

Suns and Rays

constructive algorithms, dfs and similar, implementation

Help King

implementation, probabilities, trees

INI-file

*special problem, implementation

Physical Education Lessons

data structures, implementation, sortings

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

Monster Invaders

dp, greedy, implementation

Removing Leaves

data structures, greedy, implementation, trees

Hemose in ICPC ?

binary search, dfs and similar, implementation, interactive, math, number theory, trees

MEX of LCM

binary search, data structures, implementation, math, number theory

Binary Spiders

bitmasks, data structures, implementation, math, sortings, trees

Merging Towers

data structures, dsu, implementation, trees

Sum of Medians

binary search, brute force, data structures, implementation

Robot on the Board 2

brute force, dfs and similar, graphs, implementation

Excellent Arrays

binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers

New School

binary search, data structures, dp, greedy, implementation, sortings

Yet Another Inversions Problem

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

Alice and the Doll

brute force, data structures, greedy, implementation

Sum Queries?

data structures, greedy, implementation, math

AmShZ and G.O.A.T.

binary search, brute force, greedy, implementation, math

Non-Intersecting Subpermutations

combinatorics, dp, implementation, math

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

st-Spanning Tree

dsu, graphs, greedy, implementation

Sonya and Matrix

brute force, constructive algorithms, implementation

Chips

constructive algorithms, implementation

Robot Cleaner Revisit

implementation, math, probabilities

Columns Swaps

2-sat, dfs and similar, dsu, graphs, implementation

Exotic Queries

data structures, implementation, sortings

Queue in the Train

data structures, greedy, implementation

Maximum path

dp, greedy, implementation

Rectangle Shrinking

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