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# Problem Tags Rating Solved
1858-A Buttons
games greedy math
800
1857-G Counting Graphs
combinatorics divide and conquer dsu +4
2000
1857-F Sum and Product
binary search data structures math
1600
1857-E Power of Points
math sortings
1500
1857-D Strong Vertices
math sortings trees
1300
1857-C Assembly via Minimums
greedy sortings
1200
1857-B Maximum Rounding
greedy implementation math
1100
1857-A Array Coloring
greedy math
800
1856-E2 PermuTree (hard version)
bitmasks dfs and similar dp +5
2700
1856-E1 PermuTree (easy version)
dfs and similar dp trees
1800
1856-D More Wrong
divide and conquer interactive
2100
1856-C To Become Max
binary search brute force data structures +1
1600
1856-B Good Arrays
implementation math
900
1856-A Tales of a Sort
implementation
800
1855-B Longest Divisors Interval
brute force combinatorics greedy +2
900
1855-A Dalton the Teacher
greedy math
800
1854-F Mark and Spaceship
brute force dp
3500
1854-E Game Bundles
brute force constructive algorithms dp +2
3000
1854-D Michael and Hotel
binary search interactive trees
3000
1854-C Expected Destruction
combinatorics dp math +1
2500
1854-B Earn or Unlock
bitmasks brute force dp
2200
1854-A2 Dual (Hard Version)
constructive algorithms math
1900
1854-A1 Dual (Easy Version)
constructive algorithms math
1400
1853-B Fibonaccharsis
binary search brute force math
1200
1853-A Desorting
brute force greedy math
800
1852-F Panda Meetups
data structures dp flows
3500
1852-E Rivalries
constructive algorithms data structures greedy
3400
1852-D Miriany and Matchstick
constructive algorithms dp greedy
2800
1852-C Ina of the Mountain
data structures dp greedy +1
2400
1852-B Imbalanced Arrays
constructive algorithms graphs greedy +3
1800
1852-A Ntarsis' Set
binary search math number theory
1800
1851-G Vlad and the Mountains
binary search data structures dsu +5
2000
1851-F Lisa and the Martians
bitmasks greedy math +2
1800
1851-E Nastya and Potions
dfs and similar dp graphs +1
1500
1851-D Prefix Permutation Sums
implementation math
1300
1851-C Tiles Comeback
greedy
1000
1851-B Parity Sort
greedy sortings two pointers
800
1851-A Escalator Conversations
brute force constructive algorithms math
800
1850-H The Third Letter
dfs and similar dsu graphs +2
1700
1850-G The Morning Star
combinatorics data structures geometry +3
1500
1850-F We Were Both Children
brute force implementation math +1
1300
1850-E Cardboard for Pictures
binary search geometry implementation +1
1100
1850-D Balanced Round
brute force greedy implementation +1
900
1850-C Word on the Paper
implementation strings
800
1850-B Ten Words of Wisdom
implementation sortings
800
1850-A To My Critics
implementation sortings
800
1849-F XOR Partition
binary search bitmasks data structures +3
2700
1849-E Max to the Right of Min
binary search data structures divide and conquer +3
2300
1849-D Array Painting
constructive algorithms greedy two pointers
1700
1849-C Binary String Copying
binary search brute force data structures +2
1600