Cake Collection

greedy

Maple and Multiplication

greedy, math

Ode to the Bridge Builder

constructive algorithms, geometry

Determinant Construction (Hard Version)

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

Determinant Construction (Easy Version)

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

Antiamuny and Slider Movement

brute force, combinatorics, implementation, math, sortings

Maple and Tree Beauty (Hard Version)

bitmasks, brute force, dfs and similar, dp, fft, trees

Maple and Tree Beauty (Easy Version)

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

Antiamuny Wants to Learn Swap

data structures, greedy, two pointers

Cake Assignment

bitmasks, constructive algorithms, greedy

Cry Me a River

dfs and similar, dp, games, graphs

Prefix Maximum Invariance

binary search, combinatorics, data structures, sortings

Mexification

brute force, implementation, math

Replace with Occurrences

constructive algorithms

Maximum Even Sum

brute force, greedy, implementation, math

Fun Permutation

constructive algorithms, math, number theory

Collatz Conjecture

constructive algorithms, math

Like the Bitset

constructive algorithms, greedy, two pointers

In the Dream

greedy, math

To the Infinity

data structures, hashing, math, trees

Beyond the Palindrome (Hard Version)

combinatorics, dp, math, number theory

Beyond the Palindrome (Easy Version)

combinatorics, dp, math

From the Unknown (Hard Version)

brute force, constructive algorithms, interactive, math

From the Unknown (Easy Version)

constructive algorithms, interactive, math

By the Assignment

binary search, bitmasks, combinatorics, dfs and similar, dsu, graphs, math

For the Champion

constructive algorithms, interactive, math

Against the Difference

data structures, dp

Permutation Oddness

combinatorics, dp, math

Power Boxes

constructive algorithms, dp, implementation, interactive

Sliding Tree

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

Even Larger

brute force, greedy, implementation

Add 0 or K

constructive algorithms, math, number theory

Painting With Two Colors

constructive algorithms, implementation, math

Flint and Steel

data structures, dp, graphs

I Yearned For The Mines

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

Chicken Jockey

dp, greedy

The Nether

graphs, interactive

Villagers

greedy

Redstone?

brute force, data structures, implementation, math

Famous Choreographer

hashing, implementation, strings

Rada and the Chamomile Valley

dfs and similar, graphs, shortest paths

Arithmetics Competition

binary search, data structures, greedy, sortings, ternary search

From 1 to Infinity

binary search, dp, implementation, math

The Cunning Seller (hard version)

binary search, greedy, math

The Cunning Seller (easy version)

greedy, math

The Secret Number

math

Homework

brute force, implementation, strings

Sea, You & copriMe

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

Wafu!

bitmasks, brute force, data structures, dfs and similar, dp, math

Unjust Binary Life

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

Adjacent XOR

brute force, greedy

Arboris Contractio

data structures, graphs, greedy, trees

Make it Equal

math, number theory

Alternating Series

constructive algorithms, greedy, math

Lever

math

Pathless

constructive algorithms

Submission is All You Need

greedy, math

Top-K Tracker (Hard Version)

interactive, interactive

Top-K Tracker (Easy Version)

interactive

Induced Subgraph Queries

data structures, graphs, sortings

Permutation Blackhole

brute force, combinatorics, dp, implementation, math

Interactive RBS (Hard Version)

binary search, bitmasks, constructive algorithms, dp, interactive

Interactive RBS (Medium Version)

binary search, bitmasks, constructive algorithms, interactive

Interactive RBS (Easy Version)

binary search, bitmasks, constructive algorithms, interactive

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Double Perspective

constructive algorithms, dp, dsu, graphs, greedy, sortings

Strict Triangle

graphs, greedy, shortest paths

Submedians (Hard Version)

binary search, constructive algorithms, data structures, math, two pointers

Submedians (Easy Version)

binary search, data structures, dp, greedy, math

Sum of LDS

brute force, combinatorics, dp, greedy, math

Leftmost Below

greedy, math

Deque Process

constructive algorithms, greedy, sortings, two pointers

Recycling Center

greedy, sortings

23 Rises Again

brute force, dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation, probabilities, trees

Inter Active (Hard Version)

binary search, bitmasks, constructive algorithms, graphs, implementation, interactive, math, probabilities

Inter Active (Easy Version)

binary search, constructive algorithms, interactive, probabilities

Hamed and AghaBalaSar

brute force, combinatorics, dp, math, probabilities

Ancient Tree

constructive algorithms, data structures, dfs and similar, dsu, greedy, trees

Root was Built by Love, Broken by Destiny

combinatorics, dfs and similar, graphs, trees

Trip Shopping

games, greedy, sortings

Hamiiid, Haaamid... Hamid?

games, greedy

Mix Mex Max

constructive algorithms, greedy, math

Big Wins! (hard version)

binary search, data structures, divide and conquer, dsu, trees, two pointers

Big Wins! (easy version)

binary search, data structures, dp, dsu, two pointers

1-1-1, Free Tree!

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

G-C-D, Unlucky!

math, number theory

This Is the Last Time

data structures, greedy, sortings

I Will Definitely Make It

greedy, sortings

No Casino in the Mountains

dp, greedy

Only One Digit

brute force, implementation, math

Timofey and Docker

binary search, divide and conquer, dp

Sets of Complementary Sums

brute force, combinatorics, dp, math, two pointers

Segments Covering

dp, math, probabilities

Count Good Numbers

bitmasks, combinatorics, math, number theory

Left and Down

math, number theory

Difficult Contest

constructive algorithms, implementation, sortings, strings

Lexicographic Partition

constructive algorithms, math, trees

Longest Good Subsequence

dp, math, trees

Maximise Sum

binary search, data structures

Appending Permutations (Hard Version)

combinatorics, dp