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# Problem Tags Rating Solved
1295-C Obtain The String
dp greedy strings
1600
1295-B Infinite Prefixes
math strings
1700
1295-A Display The Number
greedy
900
1294-F Three Paths on a Tree
dfs and similar dp greedy +1
2000
1294-E Obtain a Permutation
greedy implementation math
1900
1294-D MEX maximizing
data structures greedy implementation +1
1600
1294-C Product of Three Numbers
greedy math number theory
1300
1294-B Collecting Packages
implementation sortings
1200
1294-A Collecting Coins
math
800
1293-B JOE is on TV!
combinatorics greedy math
1000
1293-A ConneR and the A.R.C. Markland-N
binary search brute force implementation
1100
1292-F Nora's Toy Boxes
bitmasks combinatorics dp
3500
1292-E Rin and The Unknown Flower
constructive algorithms greedy interactive +1
3500
1292-D Chaotic V.
dp graphs greedy +3
2700
1292-C Xenon's Attack on the Gangs
combinatorics dfs and similar dp +2
2300
1292-B Aroma's Search
brute force constructive algorithms geometry +2
1700
1292-A NEKO's Maze Game
data structures dsu implementation
1400
1291-F Coffee Varieties (easy version)
graphs interactive
2800
1291-B Array Sharpening
greedy implementation
1300
1291-A Even But Not Even
greedy math strings
900
1290-F Making Shapes
dp
3500
1290-E Cartesian Tree
data structures
3300
1290-D Coffee Varieties (hard version)
constructive algorithms graphs interactive
3000
1290-C Prefix Enlightenment
dfs and similar dsu graphs
2400
1290-B Irreducible Anagrams
binary search constructive algorithms data structures +2
1800
1290-A Mind Control
brute force data structures implementation
1600
1288-F Red-Blue Graph
constructive algorithms flows
2900
1288-E Messenger Simulator
data structures
2000
1288-D Minimax Problem
binary search bitmasks dp
2000
1288-C Two Arrays
combinatorics dp
1600
1288-B Yet Another Meme Problem
math
1100
1288-A Deadline
binary search brute force math +1
1100
1287-B Hyperset
brute force data structures implementation
1500
1287-A Angry Students
greedy implementation
800
1286-F Harry The Potter
brute force constructive algorithms dp +3
3100
1286-E Fedya the Potter Strikes Back
data structures strings
3200
1286-D LCC
data structures math matrices +1
3100
1286-C2 Madhouse (Hard version)
brute force constructive algorithms hashing +2
2800
1286-C1 Madhouse (Easy version)
brute force constructive algorithms interactive +1
2400
1286-B Numbers on Tree
constructive algorithms data structures dfs and similar +3
1800
1286-A Garland
dp greedy sortings
1800
1285-F Classical?
binary search combinatorics number theory
2900
1285-E Delete a Segment
brute force constructive algorithms data structures +5
2300
1285-D Dr. Evil Underscores
bitmasks brute force dfs and similar +5
1900
1285-C Fadi and LCM
brute force math number theory
1400
1285-B Just Eat It!
dp greedy implementation
1300
1285-A Mezo Playing Zoma
math
800
1284-G Seollal
graphs
3300
1284-F New Year and Social Network
data structures graph matchings graphs +2
3200
1284-E New Year and Castle Construction
combinatorics geometry math +1
2500