Dijkstra?

graphs, shortest paths

Sereja and Brackets

data structures, schedules

Longest Regular Bracket Sequence

constructive algorithms, data structures, dp, greedy, sortings, strings

Modulo Sum

combinatorics, data structures, dp, two pointers

Zuma

dp

Roads not only in Berland

dsu, graphs, trees

The least round way

dp, math

Engineer Artem

2-sat, chinese remainder theorem, constructive algorithms, fft, flows

Enemy is weak

data structures, trees

Two Divisors

constructive algorithms, math, number theory

Zigzags

brute force, combinatorics, data structures, math, two pointers

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Tree Queries

dfs and similar, graphs, trees

Replace by MEX

brute force, constructive algorithms, sortings

Three Integers

brute force, math

Classy Numbers

combinatorics, dp

Phoenix and Science

binary search, constructive algorithms, greedy, implementation, math

XOR on Segment

bitmasks, data structures

Gargari and Bishops

greedy, hashing, implementation

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Multiset

binary search, data structures

TediousLee

dp, graphs, greedy, math, trees

Mike and Feet

binary search, data structures, dp, dsu

Guessing the Greatest (hard version)

binary search, interactive

Jzzhu and Cities

graphs, greedy, shortest paths

The Best Vacation

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

Not Adding

brute force, dp, math, number theory

Painting Fence

divide and conquer, dp, greedy

Replace the Numbers

constructive algorithms, data structures, dsu, implementation

Ant colony

data structures, math, number theory

Orac and Medians

constructive algorithms, greedy, math

Palindrome Game (hard version)

constructive algorithms, games

Maximum Subsequence Value

brute force, constructive algorithms

Tree Painting

dfs and similar, dp, trees

The Football Season

brute force, math, number theory

A/B Matrix

constructive algorithms, greedy, math

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Clear the String

dp

Tree with Maximum Cost

dfs and similar, dp, trees

Tree Tag

dfs and similar, dp, games, trees

Ice Cave

dfs and similar

Compress Words

brute force, hashing, implementation, string suffix structures, strings

Minimum spanning tree for each edge

data structures, dfs and similar, dsu, graphs, trees

0-1 MST

dfs and similar, dsu, graphs, sortings

Shichikuji and Power Grid

dsu, graphs, greedy, shortest paths, trees

Directing Edges

constructive algorithms, dfs and similar, graphs

Fill The Bag

bitmasks, greedy

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

Maximum Value

binary search, math, sortings, two pointers

K-periodic Garland

brute force, dp, greedy

Max Median

binary search, data structures, dp

Array Division

binary search, data structures, implementation

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Fools and Roads

data structures, dfs and similar, trees

Dual (Hard Version)

constructive algorithms, math

Beautiful Array

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

Minimax Problem

binary search, bitmasks, dp

K-good

constructive algorithms, math, number theory

Flood Fill

dp

Watto and Mechanism

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

Tree Shuffling

dfs and similar, dp, greedy, trees

Strange Beauty

dp, math, number theory, sortings

Magic Ship

binary search

Reachability from the Capital

dfs and similar, graphs, greedy

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Another Array Problem

brute force, constructive algorithms, greedy

SUM and REPLACE

brute force, data structures, dsu, number theory

A and B and Lecture Rooms

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

Three Bags

constructive algorithms, greedy

Breaking the Wall

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

Skyscrapers (hard version)

data structures, dp, greedy

String Reversal

data structures, greedy, strings

Strange Definition

bitmasks, graphs, hashing, math, number theory

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Blood Cousins

binary search, data structures, dfs and similar, trees

Propagating tree

data structures, dfs and similar, trees

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Pashmak and Buses

combinatorics, constructive algorithms, math

Divide and Sum

combinatorics, math, sortings

Cow and Fields

binary search, data structures, dfs and similar, graphs, greedy, shortest paths, sortings

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Bertown roads

dfs and similar, graphs

Education

brute force, dp, greedy, implementation

Genius's Gambit

bitmasks, constructive algorithms, greedy, math

Nearest Beautiful Number (easy version)

binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy

Gargari and Permutations

dfs and similar, dp, graphs, implementation

Make Them Equal

constructive algorithms, greedy, math

Match Points

binary search, greedy, sortings, ternary search, two pointers

Roads in Berland

graphs, shortest paths

Nearest Opposite Parity

dfs and similar, graphs, shortest paths

Make It Connected

dsu, graphs, greedy

Bandit in a City

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

River Locks

binary search, dp, greedy, math

Zero Remainder Sum

dp

Let's Go Hiking

games, greedy

Book of Evil

dfs and similar, divide and conquer, dp, trees

Multiple Testcases

binary search, constructive algorithms, data structures, greedy, sortings, two pointers

Connected Components?

data structures, dfs and similar, dsu, graphs

Not So Simple Polygon Embedding

binary search, brute force, geometry, math