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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Before contest
Codeforces Round 1133 (Div. 1)
19:58:45
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Before contest
Codeforces Round 1133 (Div. 2)
19:58:45
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→ Filter Problems
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constructive algorithms
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
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games
geometry
graph matchings
graphs
greedy
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implementation
interactive
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Problems
#
Name
1208C
Magic Grid
constructive algorithms
1800
x6482
1207B
Square Filling
constructive algorithms
,
greedy
,
implementation
1200
x13863
1205F
Beauty of a Permutation
constructive algorithms
,
math
3400
x194
1205D
Almost All
constructive algorithms
,
trees
2700
x806
1205A
Almost Equal
constructive algorithms
,
greedy
,
math
1200
x14884
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x5686
1198C
Matching vs Independent Set
constructive algorithms
,
graphs
,
greedy
,
sortings
2000
x4310
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x3545
1196E
Connected Component on a Chessboard
constructive algorithms
,
implementation
1800
x3956
1196B
Odd Sum Segments
constructive algorithms
,
math
1200
x17837
1196A
Three Piles of Candies
brute force
,
constructive algorithms
,
math
800
x29457
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x48
1188A2
Add on a Tree: Revolution
constructive algorithms
,
dfs and similar
,
implementation
,
trees
2500
x1374
1187C
Vasya And Array
constructive algorithms
,
greedy
,
implementation
1800
x7007
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x9423
1182D
Complete Mirror
constructive algorithms
,
dfs and similar
,
dp
,
hashing
,
implementation
,
trees
2400
x1063
1179B
Tolik and His Uncle
constructive algorithms
1800
x4721
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4770
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x8044
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x2160
1174D
Ehab and the Expected XOR Problem
bitmasks
,
constructive algorithms
1900
x5158
1174C
Ehab and a Special Coloring Problem
constructive algorithms
,
number theory
1300
x13042
1174A
Ehab Fails to Be Thanos
constructive algorithms
,
greedy
,
sortings
1000
x19722
1173B
Nauuo and Chess
constructive algorithms
,
greedy
1100
x9505
1172D
Nauuo and Portals
constructive algorithms
2900
x753
1170H
Longest Saw
*special problem
,
constructive algorithms
x58
1168E
Xor Permutations
constructive algorithms
,
math
3100
x462
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x7437
1166E
The LCMs Must be Large
bitmasks
,
brute force
,
constructive algorithms
,
math
,
number theory
2100
x3056
1166B
All the Vowels Please
constructive algorithms
,
math
,
number theory
1100
x12030
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x1074
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x1046
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x2338
1158B
The minimal unique substring
constructive algorithms
,
math
,
strings
2200
x2430
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x8715
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x1145
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2975
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x4052
1153B
Serval and Toy Bricks
constructive algorithms
,
greedy
1200
x9447
1152E
Neko and Flashback
constructive algorithms
,
dfs and similar
,
graphs
2400
x1181
1152B
Neko Performs Cat Furrier Transform
bitmasks
,
constructive algorithms
,
dfs and similar
,
math
1300
x9781
1151C
Problem for Nazar
constructive algorithms
,
math
1800
x5688
1151B
Dima and a Bad XOR
bitmasks
,
brute force
,
constructive algorithms
,
dp
1600
x13319
1149A
Prefix Sum Primes
constructive algorithms
,
greedy
,
math
,
number theory
1200
x18546
1148G
Gold Experience
constructive algorithms
,
graphs
,
math
,
number theory
,
probabilities
3300
x667
1148F
Foo Fighters
bitmasks
,
constructive algorithms
2700
x1204
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1882
1148C
Crazy Diamond
constructive algorithms
,
sortings
1700
x5714
1144D
Equalize Them All
constructive algorithms
,
greedy
1400
x10959
1144C
Two Shuffled Sequences
constructive algorithms
,
sortings
1000
x16658
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2698
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x2392
1136C
Nastya Is Transposing Matrices
constructive algorithms
,
sortings
1500
x8072
1136B
Nastya Is Playing Computer Games
constructive algorithms
,
math
1000
x12398
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x3931
1131F
Asya And Kittens
constructive algorithms
,
dsu
1700
x8057
1129B
Wrong Answer
constructive algorithms
2000
x2365
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x491
1119G
Get Ready for the Battle
constructive algorithms
,
implementation
3100
x653
1119C
Ramesses and Corner Inversion
constructive algorithms
,
greedy
,
implementation
,
math
1500
x7311
1118E
Yet Another Ball Problem
constructive algorithms
,
implementation
1700
x4536
1118C
Palindromic Matrix
constructive algorithms
,
implementation
1700
x6179
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1675
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x9496
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x797
1110E
Magic Stones
constructive algorithms
,
math
,
sortings
2200
x5250
1110C
Meaningless Operations
constructive algorithms
,
math
,
number theory
1500
x10171
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4599
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x16739
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x1338
1104A
Splitting into digits
constructive algorithms
,
implementation
,
math
800
x16014
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x1027
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3588
1103A
Grid game
constructive algorithms
,
implementation
1400
x10756
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x975
1099C
Postcard
constructive algorithms
,
implementation
1200
x10565
1099B
Squares and Segments
binary search
,
constructive algorithms
,
math
1100
x11621
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x1197
1098B
Nice table
brute force
,
constructive algorithms
,
greedy
,
math
2100
x1833
1098A
Sum in the tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1600
x9799
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x764
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x17975
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x2279
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x1021
1091B
New Year and the Treasure Geolocation
brute force
,
constructive algorithms
,
greedy
,
implementation
1200
x11089
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x392
1090D
Similar Arrays
constructive algorithms
1800
x2399
1090C
New Year Presents
constructive algorithms
,
data structures
2400
x595
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x658
1089E
Easy Chess
constructive algorithms
1700
x2175
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x3274
1088C
Ehab and a 2-operation task
constructive algorithms
,
greedy
,
math
1400
x8574
1088A
Ehab and another construction problem
brute force
,
constructive algorithms
800
x17789
1085D
Minimum Diameter Tree
constructive algorithms
,
implementation
,
trees
1700
x6018
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x4215
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x578
1081E
Missing Numbers
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1900
x2865
1081B
Farewell Party
constructive algorithms
,
implementation
1500
x4727
1081A
Definite Game
constructive algorithms
,
math
800
x13404
1080D
Olya and magical square
constructive algorithms
,
implementation
,
math
2000
x1703
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