Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
38:52:16
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
data structures
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
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x20381
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x896
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13489
1373G
Pawns
data structures
,
divide and conquer
,
greedy
2600
x756
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1617
1371F
Raging Thunder
data structures
,
divide and conquer
,
implementation
2800
x500
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4606
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2012
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x395
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1436
1366G
Construct the String
data structures
,
dp
,
strings
2700
x527
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x22169
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26691
1361F
Johnny and New Toy
data structures
,
implementation
,
math
3300
x140
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x347
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x8912
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2077
1354D
Multiset
binary search
,
data structures
1900
x8227
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x17284
1351C
Skier
data structures
,
implementation
1400
x8190
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x15828
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x769
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x24483
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x45
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x218
1344E
Train Tracks
data structures
,
trees
3100
x266
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1227
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12176
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5822
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x467
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13131
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x193
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x1955
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x7929
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10394
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1077
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12085
1332G
No Monotone Triples
data structures
3100
x281
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x365
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1497
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1599
1326E
Bombs
data structures
,
two pointers
2400
x1951
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26570
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26776
1322E
Median Mountain Range
data structures
3300
x292
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3883
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x614
1320D
Reachable Strings
data structures
,
hashing
,
strings
2500
x1189
1320C
World of Darkraft: Battle for Azathoth
brute force
,
data structures
,
sortings
2000
x2846
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15326
1316F
Battalion Strength
data structures
,
divide and conquer
,
probabilities
2800
x506
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x505
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6093
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10000
1312G
Autocompletion
data structures
,
dfs and similar
,
dp
2600
x744
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x3869
1310A
Recommendations
data structures
,
greedy
,
sortings
1700
x4915
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x5968
1304F2
Animal Observation (hard version)
data structures
,
dp
,
greedy
2400
x1273
1304F1
Animal Observation (easy version)
data structures
,
dp
2300
x1521
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x4837
1303G
Sum of Prefix Sums
data structures
,
divide and conquer
,
geometry
,
trees
2700
x712
1302C
Segment tree or Fenwick?
data structures
x376
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1192
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3608
1297I
Falling Blocks
*special problem
,
data structures
x27
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x113
1296E2
String Coloring (hard version)
data structures
,
dp
2000
x4698
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14388
1295E
Permutation Separation
data structures
,
divide and conquer
2200
x2313
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11283
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x12915
1290E
Cartesian Tree
data structures
3300
x506
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x4876
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8283
1288E
Messenger Simulator
data structures
2000
x3315
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9159
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x480
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x551
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4377
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1650
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x305
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2911
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10575
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12768
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x955
1279C
Stack of Presents
data structures
,
implementation
1400
x11378
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3680
1278C
Berry Jam
data structures
,
dp
,
greedy
,
implementation
1700
x7587
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x2957
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1461
1271D
Portals
data structures
,
dp
,
greedy
,
implementation
,
sortings
2100
x2744
1270H
Number of Components
data structures
3300
x554
1268C
K Integers
binary search
,
data structures
2300
x1660
1266E
Spaceship Solitaire
data structures
,
greedy
,
implementation
2100
x2067
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3405
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3317
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12281
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1119
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x831
←
1
2
...
6
7
8
9
10
...
16
17
→
User lists
Name