Friendly Spiders

dfs and similar, graphs, math, number theory, shortest paths

Heidi Learns Hashing (Easy)

brute force, math, number theory

Vika and Price Tags

math, number theory

Infinite Set

bitmasks, dp, math, matrices, number theory, strings

DMCA

*special problem, implementation, number theory

The Meaningless Game

math, number theory

Treasure Hunt

implementation, math, number theory

Nastya Studies Informatics

math, number theory

Gerald and Giant Chess

combinatorics, dp, math, number theory

Strange Definition

bitmasks, graphs, hashing, math, number theory

Ice Sculptures

*special problem, brute force, number theory

SUM and REPLACE

brute force, data structures, dsu, number theory

Round Table Knights

dp, math, number theory

Cows and Primitive Roots

implementation, math, number theory

Strange Beauty

dp, math, number theory, sortings

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Modular Equations

math, number theory

Fair

graphs, greedy, number theory, shortest paths

Neko does Maths

brute force, math, number theory

A Trivial Problem

brute force, constructive algorithms, math, number theory

K-good

constructive algorithms, math, number theory

Final Countdown

implementation, math, number theory

Fortune Telling

implementation, number theory

Chopping Carrots (Easy Version)

binary search, brute force, constructive algorithms, greedy, number theory

Shifting String

graphs, math, number theory, strings

Vile Grasshoppers

brute force, math, number theory

Cave Painting

brute force, number theory

Leha and Function

combinatorics, greedy, math, number theory, sortings

Limericks

*special problem, math, number theory

Subtractions

math, number theory

Prime Graph

constructive algorithms, greedy, math, number theory

Battling with Numbers

combinatorics, math, number theory

Trailing Loves (or L'oeufs?)

brute force, implementation, math, number theory

Drazil and His Happy Friends

brute force, dsu, meet-in-the-middle, number theory

Physical Education Lesson

brute force, math, number theory

Power Products

hashing, math, number theory

The Football Season

brute force, math, number theory

Effects of Anti Pimples

combinatorics, number theory, sortings

Ntarsis' Set

binary search, math, number theory

GCD Table

constructive algorithms, greedy, number theory

Win or Freeze

games, math, number theory

Position in Fraction

math, number theory

Ant colony

data structures, math, number theory

Sasha and Magnetic Machines

greedy, number theory

Submarine in the Rybinsk Sea (easy edition)

combinatorics, math, number theory

Quiz Master

binary search, math, number theory, sortings, two pointers

Ksusha and Array

brute force, number theory, sortings

Candy Store

greedy, math, number theory

Weakened Common Divisor

brute force, greedy, number theory

Short Task

brute force, dp, math, number theory

Not Adding

brute force, dp, math, number theory

k-rounding

brute force, math, number theory

Infinite Fence

greedy, math, number theory

Levko and Permutation

constructive algorithms, math, number theory

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Koala and Lights

implementation, math, number theory

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Balance (Easy version)

brute force, data structures, implementation, number theory

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Enlarge GCD

number theory

Urbanization

greedy, number theory, sortings

Lucky Chains

math, number theory

Multiplicity

data structures, dp, implementation, math, number theory

Math

greedy, math, number theory

Same GCDs

math, number theory

Alice and Bob

games, math, number theory

Rational Resistance

math, number theory

Co-prime Array

greedy, implementation, math, number theory

Primes and Multiplication

math, number theory

Divisiblity of Differences

implementation, math, number theory

Good Triples

brute force, combinatorics, number theory

Dima and Lisa

brute force, math, number theory

X-Magic Pair

math, number theory

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Even Subarrays

bitmasks, brute force, hashing, math, number theory

Hacking Cypher

brute force, math, number theory, strings

Meaningless Operations

constructive algorithms, math, number theory

Joty and Chocolate

implementation, math, number theory

Maximum splitting

dp, greedy, math, number theory

Hossam and Trainees

greedy, math, number theory

Arpa’s obvious problem and Mehrdad’s terrible solution

brute force, math, number theory

Alarm Clocks Everywhere

math, number theory

Routine Problem

greedy, math, number theory

Ceil Divisions

brute force, constructive algorithms, math, number theory

Square Difference

math, number theory

Proper Nutrition

brute force, implementation, number theory

Integers Have Friends

binary search, data structures, divide and conquer, math, number theory, two pointers

Diverse Matrix

constructive algorithms, greedy, math, number theory

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

Complex Market Analysis

binary search, dp, implementation, number theory, schedules, two pointers

Floor and Mod

binary search, brute force, math, number theory

Pride

brute force, dp, greedy, math, number theory

Round Corridor

math, number theory

Good Sequences

dp, number theory

Mashmokh and Numbers

constructive algorithms, number theory

New Year and the Sphere Transmission

math, number theory

Vlad and an Odd Ordering

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

Bash's Big Day

greedy, math, number theory

Polycarp and Div 3

dp, greedy, number theory

Two Divisors

constructive algorithms, math, number theory