Problems Playground
Login
Min rating
Max rating
Tag
Reset
# Problem Tags Rating Solved
1776-B Vittorio Plays with LEGO Bricks
dp geometry
2200
1776-A Walking Boy
greedy
800
1775-F Laboratory on Pluto
constructive algorithms dp greedy +1
2500
1775-E The Human Equation
greedy implementation
2100
1775-D Friendly Spiders
dfs and similar graphs math +2
1800
1775-C Interesting Sequence
bitmasks math
1600
1775-B Gardener and the Array
bitmasks constructive algorithms
1300
1775-A2 Gardener and the Capybaras (hard version)
constructive algorithms greedy
900
1775-A1 Gardener and the Capybaras (easy version)
brute force constructive algorithms implementation
800
1774-H Maximum Permutation
constructive algorithms
3500
1774-G Segment Covering
brute force combinatorics constructive algorithms +3
3200
1774-F2 Magician and Pigs (Hard Version)
binary search brute force data structures +1
2700
1774-F1 Magician and Pigs (Easy Version)
brute force data structures implementation
2400
1774-E Two Chess Pieces
dfs and similar dp greedy +1
1900
1774-D Same Count One
brute force constructive algorithms greedy +2
1600
1774-C Ice and Fire
constructive algorithms dp greedy
1300
1774-B Coloring
constructive algorithms greedy math
1500
1774-A Add Plus Minus Sign
constructive algorithms math
800
1773-L Lisa's Sequences
dp
3500
1773-K King's Puzzle
constructive algorithms
1900
1773-J Jumbled Trees
constructive algorithms math
2900
1773-I Interactive Factorial Guessing
brute force games implementation +1
2500
1773-H Hot and Cold
binary search interactive
2600
1773-G Game of Questions
bitmasks combinatorics dp +3
2800
1773-F Football
constructive algorithms
800
1773-E Easy Assembly
greedy sortings
1400
1773-D Dominoes
combinatorics flows graph matchings +1
2600
1773-C Cactus Meets Torus
3500
1773-B BinCoin
binary search divide and conquer hashing +3
2200
1773-A Amazing Trick
constructive algorithms graph matchings math +1
1900
1772-G Gaining Rating
binary search greedy implementation +3
2200
1772-F Copy of a Copy of a Copy
constructive algorithms dfs and similar graphs +2
2000
1772-E Permutation Game
games
1700
1772-D Absolute Sorting
constructive algorithms math
1400
1772-C Different Differences
constructive algorithms greedy math
1000
1772-B Matrix Rotation
brute force implementation
800
1772-A A+B?
implementation
800
1771-F Hossam and Range Minimum Query
binary search bitmasks data structures +4
2500
1771-E Hossam and a Letter
brute force dp implementation +1
2500
1771-D Hossam and (sub-)palindromic tree
brute force data structures dfs and similar +3
2100
1771-C Hossam and Trainees
greedy math number theory
1600
1771-B Hossam and Friends
binary search constructive algorithms dp +1
1400
1771-A Hossam and Combinatorics
combinatorics math sortings
900
1770-H Koxia, Mahiru and Winter Festival
constructive algorithms
3500
1770-G Koxia and Bracket
divide and conquer fft math
3400
1770-F Koxia and Sequence
bitmasks combinatorics dp +2
3100
1770-E Koxia and Tree
combinatorics dfs and similar dp +4
2400
1770-D Koxia and Game
constructive algorithms data structures dfs and similar +6
2000
1770-C Koxia and Number Theory
brute force chinese remainder theorem math +1
1700
1770-B Koxia and Permutation
constructive algorithms
1000