Lisa and the Martians

bitmasks, greedy, math, strings, trees

Tiles Comeback

greedy

Parity Sort

greedy, sortings, two pointers

The Third Letter

dfs and similar, dsu, graphs, greedy, implementation

Balanced Round

brute force, greedy, implementation, sortings

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Array Painting

constructive algorithms, greedy, two pointers

Monsters

greedy, math, sortings

Vika and the Bridge

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

The Boss's Identity

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

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Vampiric Powers, anyone?

bitmasks, brute force, dp, greedy

Hamon Odyssey

bitmasks, greedy, two pointers

The Man who became a God

greedy, sortings

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Rating System

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

Strong Password

binary search, dp, greedy, strings

Min Cost Permutation (Hard Version)

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

Min Cost Permutation (Easy Version)

brute force, constructive algorithms, greedy, math

Row Major

constructive algorithms, greedy, math, number theory, strings

Particles

dp, greedy, implementation, math

Omsk Metro (simple version)

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

Long Long

greedy, math, two pointers

Sasha and Array Coloring

greedy, sortings, two pointers

Tenzing and Necklace

divide and conquer, dp, greedy

Tenzing and Tree

dfs and similar, greedy, shortest paths, sortings, trees

Tenzing and Triangle

data structures, dp, geometry, greedy, math

Tenzing and His Animal Friends

constructive algorithms, graphs, greedy

Tenzing and Books

bitmasks, greedy, math

Fill the Matrix

data structures, greedy, math

Pairs of Segments

data structures, greedy, sortings, two pointers

Ranom Numbers

brute force, dp, greedy, math, strings

Wooden Toy Festival

binary search, greedy, sortings

Decreasing Game

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

Lamps

greedy, sortings

The Good Array

greedy, implementation, math

Bracket Walk

data structures, greedy, strings

Editorial for Two

binary search, data structures, greedy, implementation

Bracket Coloring

constructive algorithms, greedy

Best Binary String

constructive algorithms, greedy

Comparison String

greedy

Astrophysicists

greedy, math

Lottery

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

Survey in Class

brute force, data structures, greedy, implementation, sortings

Game with Reversing

games, greedy, math, strings

Maximum Strength

greedy, math

Unit Array

greedy, math

Ksyusha and Chinchilla

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

Flipper

brute force, constructive algorithms, greedy

Vlad Building Beautiful Array

greedy, math

Restore the Weather

greedy, sortings

Red-Blue Operations (Hard Version)

binary search, constructive algorithms, greedy, implementation, math

Red-Blue Operations (Easy Version)

binary search, greedy, implementation, math

Contrast Value

greedy, implementation

Array merging

constructive algorithms, greedy

Hyperregular Bracket Strings

combinatorics, greedy, hashing, math, number theory, sortings

Mr. Perfectly Fine

bitmasks, greedy, implementation

Copium Permutation

constructive algorithms, data structures, greedy

Bus Routes

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

Two Centroids

data structures, dfs and similar, greedy, trees

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Range Sorting (Easy Version)

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

Running Miles

brute force, dp, greedy

Dreaming of Freedom

greedy, math, number theory

Trust Nobody

brute force, greedy, implementation, sortings

LuoTianyi and the Table

greedy, math

LuoTianyi and the Palindrome String

greedy, strings

LuoTianyi and XOR-Tree

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

LuoTianyi and the Show

greedy, implementation

Strongly Composite

greedy, math, number theory

Making Anti-Palindromes

greedy, math, strings

Karina and Array

greedy, math, sortings

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Black Cells

binary search, brute force, greedy, math

Sort the Subarray

brute force, greedy

The Butcher

geometry, greedy, implementation, sortings, two pointers

Constructive Problem

brute force, greedy

Politics

greedy, implementation

Half-sum

brute force, divide and conquer, greedy

Almost Increasing Subsequence

binary search, data structures, greedy

Grid Reconstruction

constructive algorithms, greedy

Between

constructive algorithms, dfs and similar, graphs, greedy

Ian and Array Sorting

greedy, math

Search in Parallel

constructive algorithms, greedy, sortings

Restore the Array

constructive algorithms, greedy

Insert Digit

greedy, math, strings

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

Make It Permutation

brute force, greedy, sortings

Beautiful Sequence

brute force, greedy

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Binary String Sorting

constructive algorithms, greedy

Sum on Subarrays

constructive algorithms, greedy, math

Points on Plane

binary search, greedy, math

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

Find and Replace

greedy, implementation, strings

Grab the Candies

greedy

GCD Master (hard version)

greedy, math, sortings