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Codeforces Round 1000 (Div. 2)
23:44:43
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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
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Custom test
Problems
#
Name
1359E
Modular Stability
combinatorics
,
math
,
number theory
2000
x6204
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x9683
1359C
Mixing Water
binary search
,
math
1700
x14070
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x466
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2352
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8294
1358C
Celex Update
math
1600
x17593
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x881
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x5261
1355D
Game With Array
constructive algorithms
,
math
1400
x18234
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10829
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x808
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x1247
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3424
1354D
Multiset
binary search
,
data structures
1900
x9027
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x6135
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15887
1353F
Decreasing Heights
brute force
,
dp
2200
x3388
1353E
K-periodic Garland
brute force
,
dp
,
greedy
1900
x7284
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x18448
1352G
Special Permutation
constructive algorithms
1600
x21958
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x17657
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x21161
1351C
Skier
data structures
,
implementation
1400
x8715
1350B
Orac and Models
dp
,
math
,
number theory
1400
x23291
1349F2
Slime and Sequences (Hard Version)
dp
,
fft
,
math
3500
x115
1349F1
Slime and Sequences (Easy Version)
dp
,
fft
,
math
3100
x456
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x93
1349D
Slime and Biscuits
math
,
probabilities
3200
x932
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4577
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x8279
1349A
Orac and LCM
data structures
,
math
,
number theory
1600
x17736
1348F
Phoenix and Memory
data structures
,
dfs and similar
,
graphs
,
greedy
2600
x829
1348E
Phoenix and Berries
brute force
,
dp
,
greedy
,
math
2400
x2265
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8964
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14771
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x25763
1346I
Pac-Man 2.0
*special problem
,
dp
2900
x50
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x51
1346G
Two IP Cameras
*special problem
,
math
,
number theory
2300
x138
1346F
Dune II: Battle For Arrakis
*special problem
,
data structures
,
greedy
,
math
2000
x232
1346E
Magic Tricks
*special problem
,
dp
,
graphs
1700
x383
1346D
Constructing the Dungeon
*special problem
,
graphs
,
greedy
1600
x516
1346C
Spring Cleaning
*special problem
,
greedy
,
sortings
1600
x613
1346B
Boot Camp
*special problem
,
greedy
1400
x1218
1344F
Piet's Palette
matrices
3200
x457
1344E
Train Tracks
data structures
,
trees
3100
x469
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x1193
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1882
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6123
1344A
Hilbert's Hotel
math
,
number theory
,
sortings
1600
x15792
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1294
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x5268
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12844
1342F
Make It Ascending
bitmasks
,
brute force
,
dp
3000
x783
1342E
Placing Rooks
combinatorics
,
fft
,
math
2300
x3152
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6155
1342C
Yet Another Counting Problem
math
,
number theory
1600
x14210
1340F
Nastya and CBS
brute force
,
data structures
,
hashing
3300
x549
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x53
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x1005
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2279
1340B
Nastya and Scoreboard
bitmasks
,
dp
,
graphs
,
greedy
1700
x7913
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13455
1338E
JYPnation
graphs
3500
x247
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1032
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3263
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x8568
1338A
Powered Addition
greedy
,
math
1500
x24881
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x232
1336E2
Chiori and Doll Picking (hard version)
bitmasks
,
brute force
,
combinatorics
,
math
3500
x358
1336E1
Chiori and Doll Picking (easy version)
bitmasks
,
brute force
,
combinatorics
,
math
2700
x715
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x489
1336C
Kaavi and Magic Spell
dp
,
strings
2200
x3661
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11536
1336A
Linova and Kingdom
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
1600
x20948
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x2213
1335E2
Three Blocks Palindrome (hard version)
brute force
,
data structures
,
dp
,
two pointers
1800
x8462
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10997
1334G
Substring Search
bitmasks
,
brute force
,
fft
2900
x377
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1350
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2884
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7398
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x16912
1333F
Kate and imperfection
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2200
x4327
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1711
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3969
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12721
1332G
No Monotone Triples
data structures
3100
x304
1332F
Independent Set
dfs and similar
,
dp
,
trees
2500
x1030
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3900
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8224
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x17137
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x17852
1330B
Dreamoon Likes Permutations
implementation
,
math
1400
x14143
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x190
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x482
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1724
1329B
Dreamoon Likes Sequences
bitmasks
,
combinatorics
,
math
1700
x6744
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x9218
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