Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Swimmers in the Pool

dp, fft, math, number theory

Boxes and Balls

dp, implementation, math

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Strong Password

binary search, dp, greedy, strings

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Particles

dp, greedy, implementation, math

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Omsk Metro (simple version)

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

Apple Tree

combinatorics, dfs and similar, dp, math, trees

Tenzing and Necklace

divide and conquer, dp, greedy

Tenzing and Random Real Numbers

bitmasks, dp, graphs, math, probabilities

Tenzing and Random Operations

combinatorics, dp, math, probabilities

Tenzing and Triangle

data structures, dp, geometry, greedy, math

Tenzing and Balls

dp

Ranom Numbers

brute force, dp, greedy, math, strings

Railguns

brute force, dfs and similar, dp, graphs

Decreasing Game

constructive algorithms, dfs and similar, dp, greedy, interactive

Ball Sorting

data structures, dp, sortings

Count Supersequences

combinatorics, dp, math

Old Mobile

combinatorics, dp, probabilities

Ksyusha and Chinchilla

constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees

Zombies

binary search, dp

Combinatorics Problem

brute force, combinatorics, dp

The Third Grace

data structures, dp

Mex Tree

brute force, dp, trees

Copil Copac Draws Trees

dfs and similar, dp, graphs, trees

Don't Blame Me

bitmasks, combinatorics, dp, math

Hits Different

data structures, dp, implementation, math

Gold Rush

brute force, dfs and similar, dp, implementation

Palindrome Partition

binary search, brute force, data structures, dp, hashing, strings

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Running Miles

brute force, dp, greedy

LuoTianyi and XOR-Tree

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

Random Walk

dp, graphs, math, probabilities, trees

Removing Graph

brute force, dp, games, graphs, math

Gardening Friends

brute force, dfs and similar, dp, graphs, trees

Timber

combinatorics, dp, fft, math

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Willy-nilly, Crack, Into Release!

data structures, dp

Misha and Apples

brute force, data structures, dp, two pointers

The Fox and the Complete Tree Traversal

constructive algorithms, dp, implementation, math, trees

Bosco and Particle

dp, math, number theory, strings

XOR Counting

bitmasks, combinatorics, dp, math

Chain Chips

data structures, dp, matrices

Vlad and the Nice Paths (hard version)

binary search, combinatorics, data structures, dp, math, two pointers

Vlad and the Nice Paths (easy version)

combinatorics, dp, math

Living Sequence

binary search, dp, math, number theory

The Maximum Prefix

dp

Prediction

combinatorics, dp, math

Two Tanks

binary search, dp, implementation, math

Minibuses on Venus (hard version)

brute force, combinatorics, dp, math

Minibuses on Venus (medium version)

combinatorics, divide and conquer, dp, matrices

Minibuses on Venus (easy version)

combinatorics, divide and conquer, dp

Unlucky Numbers

brute force, dp, greedy, implementation

Subsequence Addition (Hard Version)

bitmasks, dp, greedy, implementation, sortings

Subsequence Addition (Easy Version)

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

DSU Master

combinatorics, dp, dsu, math

There Should Be a Lot of Maximums

brute force, data structures, dfs and similar, dp, trees, two pointers

A Wide, Wide Graph

dfs and similar, dp, graphs, greedy, trees

Code Lock

bitmasks, dp

Routing

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

Accommodation

brute force, dp, greedy, implementation

Another n-dimensional chocolate bar

dp, math, meet-in-the-middle, number theory

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

Music Festival

binary search, data structures, dp, greedy, sortings

Tree Cutting

bitmasks, dfs and similar, dp

Count Voting

combinatorics, dp, math

Halve or Subtract

binary search, brute force, dp, greedy, sortings

Hot Start Up (hard version)

data structures, dp

Hot Start Up (easy version)

dp

Gifts from Grandfather Ahmed

dp, math, number theory

Multitest Generator

brute force, dp

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

Colored Subgraphs

dfs and similar, dp, games, greedy, trees

Maximum Subarray

data structures, dp, greedy, two pointers

Explosions?

binary search, data structures, dp, greedy, math

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Counting Factorizations

combinatorics, divide and conquer, dp, math, number theory

Velepin and Marketing

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

Moscow Gorillas

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

Graph Coloring (hard version)

brute force, combinatorics, divide and conquer, dp, fft, graphs

Graph Coloring (easy version)

combinatorics, dp, graphs

Divisors and Table

brute force, dfs and similar, dp, number theory

Negatives and Positives

dp, greedy, sortings

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

Serval and Music Game

brute force, dp, implementation, math, number theory

Serval and Toxel's Arrays

combinatorics, dp, implementation, math

Sum Over Zero

data structures, dfs and similar, dp

Codeforces Scoreboard

binary search, data structures, dp, geometry

Remove the Bracket

dp, greedy, math

Infinite Game

brute force, combinatorics, dp, games, probabilities

Wooden Spoon

combinatorics, dp

Different Arrays

brute force, dp, implementation

Bracket Insertion

combinatorics, dp, math, trees

Three Chairs

bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings

Xorcerer's Stones

bitmasks, constructive algorithms, dp, trees

Boris and His Amazing Haircut

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