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Name
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2900
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x10965
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x586
1510I
Is It Rated?
greedy
,
interactive
,
math
,
probabilities
2700
x449
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x14021
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6845
1499G
Graph Coloring
data structures
,
graphs
,
interactive
3100
x186
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1839
1493F
Enchanted Matrix
bitmasks
,
interactive
,
number theory
2600
x375
1491F
Magnets
binary search
,
constructive algorithms
,
interactive
2700
x900
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8140
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x11648
1482G
Vabank
binary search
,
interactive
3200
x263
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x11126
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1306
1466I
The Riddle of the Sphinx
binary search
,
data structures
,
data structures
,
interactive
3400
x182
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x2837
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x4205
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x130
1442F
Differentiating Games
games
,
interactive
3400
x129
1438F
Olha and Igor
interactive
,
probabilities
,
trees
3000
x611
1428H
Rotary Laser Lock
binary search
,
interactive
3500
x88
1425F
Flamingoes of Mystery
interactive
1400
x5264
1423M
Milutin's Plums
interactive
2800
x144
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11423
1406E
Deleting Numbers
interactive
,
math
,
number theory
2600
x1553
1404D
Game of Pairs
constructive algorithms
,
dfs and similar
,
interactive
,
math
,
number theory
2800
x984
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x286
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3239
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x251
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1932
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x424
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1246
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1367
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x848
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x918
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1114
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3829
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x813
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x720
1340E
Nastya and Bees
graphs
,
interactive
,
probabilities
3000
x52
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x466
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4757
1299E
So Mean
interactive
,
math
3400
x148
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x328
1291F
Coffee Varieties (easy version)
graphs
,
interactive
2800
x504
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x668
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x610
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1260
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2062
1275F
Шардирование постов
*special problem
,
binary search
,
interactive
x91
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4399
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x731
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1262
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x5626
1205C
Palindromic Paths
implementation
,
interactive
2400
x1127
1201E2
Knightmare (hard)
graphs
,
interactive
,
shortest paths
3000
x140
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x125
1179E
Alesya and Discrete Math
divide and conquer
,
interactive
3200
x169
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1452
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x10704
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x147
1155E
Guess the Root
brute force
,
interactive
,
math
2200
x1391
1153E
Serval and Snake
binary search
,
brute force
,
interactive
2200
x1449
1147F
Zigzag Game
games
,
interactive
3500
x239
1147E
Rainbow Coins
interactive
3000
x323
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3524
1145G
AI Takeover
interactive
x161
1142E
Pink Floyd
graphs
,
interactive
3200
x486
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1474
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x407
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1452
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2774
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3170
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x833
1091G
New Year and the Factorisation Collaboration
interactive
,
math
,
number theory
3200
x197
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x299
1089C
Cactus Search
interactive
2500
x401
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2762
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x449
1080F
Katya and Segments Sets
data structures
,
interactive
,
sortings
2400
x672
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2792
1061F
Lost Root
interactive
,
probabilities
2400
x687
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2320
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1549
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2276
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x582
1033D
Divisors
interactive
,
math
,
number theory
2000
x2309
1028G
Guess the number
dp
,
interactive
3000
x529
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x1956
1019B
The hat
binary search
,
interactive
2000
x1891
1010B
Rocket
binary search
,
interactive
1800
x5074
1007C
Guess two numbers
binary search
,
interactive
3000
x407
952B
A Map of the Cat
brute force
,
interactive
1900
x1992
927A
BuberPool Taxi Optimization
*special problem
,
interactive
2900
x1
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x488
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2051
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1194
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x1651
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2143
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Codeforces Round 945 (Div. 2)
09:12:27
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→ Filter Problems
Difficulty:
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interactive
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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