Position in Fraction

math, number theory

Rectangles

combinatorics, math

Shashlik Cooking

dp, greedy, math

Expansion coefficient of the array

implementation, math

Leha and Function

combinatorics, greedy, math, number theory, sortings

Dasha and friends

brute force, implementation, math

Average Sleep Time

data structures, implementation, math

Selection of Personnel

combinatorics, math

A Trivial Problem

brute force, constructive algorithms, math, number theory

Cards

constructive algorithms, dp, math

Segments

constructive algorithms, math

Magical Array

math

Plant

math

Lara Croft and the New Game

implementation, math

Okabe and Banana Trees

brute force, math

Not Afraid

greedy, implementation, math

Olympic Medal

greedy, math

After Training

data structures, implementation, math

Mister B and Angle in Polygon

constructive algorithms, geometry, math

Forecast

math

Friends

graphs, implementation, math

Progress Bar

implementation, math

Messages

math

Counting Rhombi

brute force, math

Find Color

constructive algorithms, geometry, implementation, math

2-3-numbers

implementation, math

A Student's Dream

greedy, math

Cookies

math

Maximize Sum of Digits

*special problem, implementation, math

Rock-Paper-Scissors

implementation, math

Not Wool Sequences

constructive algorithms, math

Elevator

implementation, math

Epic Novel

*special problem, math

Two Buttons

dfs and similar, graphs, greedy, implementation, math, shortest paths

I Hate 1111

dp, math, number theory

Drazil and Factorial

greedy, math, sortings

Amr and Pins

geometry, math

Number Game

games, math, number theory

Zero Remainder Array

math, sortings, two pointers

Fadi and LCM

brute force, math, number theory

Maximum Median

binary search, greedy, math, sortings

Orac and Models

dp, math, number theory

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Arranging The Sheep

greedy, math

Ball in Berland

combinatorics, graphs, math

RationalLee

greedy, math, sortings, two pointers

k-th divisor

math, number theory

Divide by three, multiply by two

dfs and similar, math, sortings

Game With Array

constructive algorithms, math

Composite Coloring

brute force, constructive algorithms, greedy, math, number theory

Johnny and Another Rating Drop

bitmasks, greedy, math

Add to Neighbour and Remove

greedy, math, number theory

Adding Powers

bitmasks, greedy, implementation, math, number theory, ternary search

Fortune Telling

bitmasks, math

Journey Planning

data structures, dp, greedy, math, sortings

Add Modulo 10

brute force, math, number theory

National Project

math

Simple Polygon Embedding

binary search, geometry, math, ternary search

Meximum Array

binary search, constructive algorithms, greedy, implementation, math, two pointers

Sum of Substrings

brute force, constructive algorithms, greedy, math, strings

Watchmen

data structures, geometry, math

Absolute Sorting

constructive algorithms, math

Toy Blocks

binary search, greedy, math, sortings

Swaps

greedy, math, sortings

LIS or Reverse LIS?

constructive algorithms, greedy, implementation, math

Adding Digits

implementation, math

LR-remainders

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

AND Sequences

bitmasks, combinatorics, constructive algorithms, math

Dreamoon Likes Permutations

implementation, math

Computer Game

binary search, math

Make Good

bitmasks, constructive algorithms, math

Anna and the Valentine's Day Gift

games, greedy, math, sortings

No Prime Differences

constructive algorithms, math, number theory

Sasha and the Casino

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

Dual (Easy Version)

constructive algorithms, math

Everyone is a Winner!

binary search, math, meet-in-the-middle, number theory

Zero-One (Easy Version)

constructive algorithms, greedy, math

XOR-distance

bitmasks, greedy, implementation, math

Klever Permutation

constructive algorithms, math, two pointers

Bear and Prime 100

constructive algorithms, interactive, math

Place for a Selfie

binary search, data structures, geometry, math

Weird Sum

combinatorics, data structures, geometry, math, matrices, sortings

Row Major

constructive algorithms, greedy, math, number theory, strings

Filling the Grid

implementation, math

Fishingprince Plays With Array

constructive algorithms, greedy, implementation, math

Everything Nim

games, greedy, math, sortings

Jellyfish and Green Apple

bitmasks, greedy, math, number theory

Add, Divide and Floor

constructive algorithms, greedy, math

Lost Numbers

brute force, divide and conquer, interactive, math

The World is a Theatre

combinatorics, math

Reverse Card (Easy Version)

brute force, math, number theory

Candies!

data structures, dp, implementation, math

Gourmet Cat

implementation, math

Torn Lucky Ticket

brute force, dp, hashing, implementation, math

Heavy Intervals

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

Bash's Big Day

greedy, math, number theory

Covered Path

dp, greedy, math

Ticket Hoarding

greedy, math, sortings

Permutation Counting

binary search, greedy, implementation, math, sortings

New Year and the Sphere Transmission

math, number theory