Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 968 (Div. 2)
34:15:45
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
dp
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x737
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x692
1420E
Battle Lemmings
dp
,
greedy
2500
x921
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4626
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x283
1416C
XOR Inverse
bitmasks
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
sortings
,
strings
,
trees
2000
x4342
1415F
Cakes for Clones
dp
2900
x480
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5677
1409F
Subsequences of Length Two
dp
,
strings
2100
x4415
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7777
1408I
Bitwise Magic
dp
,
math
3200
x173
1408G
Clusterization Counting
combinatorics
,
dp
,
dsu
,
fft
,
graphs
,
trees
2700
x1021
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4286
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1678
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4765
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7343
1403C
Chess Rush
*special problem
,
combinatorics
,
dp
,
implementation
,
math
3200
x48
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x203
1401D
Maximum Distributed Tree
dfs and similar
,
dp
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
trees
1800
x9244
1400G
Mercenaries
bitmasks
,
brute force
,
combinatorics
,
dp
,
dsu
,
math
,
two pointers
2600
x951
1400F
x-prime Substrings
brute force
,
dfs and similar
,
dp
,
string suffix structures
,
strings
2800
x824
1400E
Clear the Multiset
data structures
,
divide and conquer
,
dp
,
greedy
2200
x5388
1399F
Yet Another Segments Subset
data structures
,
dp
,
graphs
,
sortings
2300
x1598
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1272
1398D
Colored Rectangles
dp
,
greedy
,
sortings
1800
x11398
1396C
Monster Invaders
dp
,
greedy
,
implementation
2300
x2530
1394D
Boboniu and Jianghu
dp
,
greedy
,
sortings
,
trees
2800
x1013
1394A
Boboniu Chats with Du
dp
,
greedy
,
sortings
,
two pointers
1800
x6743
1393E2
Twilight and Ancient Scroll (harder version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
3200
x363
1393E1
Twilight and Ancient Scroll (easier version)
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
2800
x387
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x3981
1392H
ZS Shuffles Cards
combinatorics
,
dp
,
math
,
probabilities
3000
x698
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x479
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x5228
1389G
Directing Edges
dfs and similar
,
dp
,
graphs
,
trees
2800
x390
1389F
Bicolored Segments
data structures
,
dp
,
graph matchings
,
sortings
2600
x965
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x127
1387B1
Village (Minimum)
*special problem
,
dp
,
greedy
,
trees
2100
x1414
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x701
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2485
1384B1
Koa and the Beach (Easy Version)
brute force
,
dp
,
greedy
1900
x3882
1383E
Strange Operation
combinatorics
,
data structures
,
dp
2800
x773
1383C
String Transformation 2
bitmasks
,
dp
,
graphs
,
trees
3100
x568
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x5020
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x658
1381B
Unmerge
dp
1800
x8832
1380F
Strange Addition
data structures
,
dp
,
matrices
2600
x776
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x424
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5506
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x2721
1372E
Omkar and Last Floor
dp
,
greedy
,
two pointers
2900
x1173
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5352
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2328
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9536
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x641
1369D
TediousLee
dp
,
graphs
,
greedy
,
math
,
trees
1900
x8572
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x347
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1639
1367F1
Flying Sort (Easy Version)
dp
,
greedy
,
two pointers
2100
x3239
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5408
1366G
Construct the String
data structures
,
dp
,
strings
2700
x539
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x796
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4228
1363F
Rotating Substrings
dp
,
strings
2600
x1480
1363E
Tree Shuffling
dfs and similar
,
dp
,
greedy
,
trees
2000
x6780
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9367
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x1186
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3296
1353F
Decreasing Heights
brute force
,
dp
2200
x3298
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x7099
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x110
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x410
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x91
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2181
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x48
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1853
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x705
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2221
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1001
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3579
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8311
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1291
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x993
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x13070
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x423
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1643
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8901
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x77
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x481
1326F1
Wise Men (Easy Version)
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2600
x834
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9811
1322F
Assigning Fares
dp
,
trees
3500
x96
1322D
Reality Show
bitmasks
,
dp
2800
x709
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x804
1316E
Team Building
bitmasks
,
dp
,
greedy
,
sortings
2300
x3939
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1326
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6432
1312G
Autocompletion
data structures
,
dfs and similar
,
dp
2600
x978
1312E
Array Shrinking
dp
,
greedy
2100
x5842
1310E
Strange Function
dp
2900
x284
←
1
2
...
5
6
7
8
9
...
16
17
→
User lists
Name