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Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register
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Codeforces Round 1133 (Div. 1)
20:04:59
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Codeforces Round 1133 (Div. 2)
20:04:58
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constructive algorithms
combine-tags-by-or
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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
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
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number theory
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sortings
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strings
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Problems
#
Name
1396E
Distance Matching
constructive algorithms
,
dfs and similar
,
trees
3200
x450
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x13544
1396A
Multiples of Length
constructive algorithms
,
greedy
,
number theory
1600
x16990
1395B
Boboniu Plays Chess
constructive algorithms
1100
x16453
1393C
Pinkie Pie Eats Patty-cakes
constructive algorithms
,
greedy
,
math
,
sortings
1700
x11156
1393B
Applejack and Storages
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x17553
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x2749
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3991
1391E
Pairs of Pairs
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2600
x2134
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x5956
1391A
Suborrays
constructive algorithms
,
math
800
x25230
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x52545
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x374
1385E
Directing Edges
constructive algorithms
,
dfs and similar
,
graphs
2000
x10050
1384B2
Koa and the Beach (Hard Version)
constructive algorithms
,
dp
,
greedy
,
implementation
2200
x2658
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x19923
1383D
Rearrange
brute force
,
constructive algorithms
,
graphs
,
greedy
,
sortings
2800
x872
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x5874
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1756
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x14614
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x22075
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x5130
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x601
1375H
Set Merging
constructive algorithms
,
divide and conquer
3300
x561
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x2380
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x2614
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x3568
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x10414
1375C
Element Extermination
constructive algorithms
,
data structures
,
greedy
1400
x23451
1375B
Neighbor Grid
constructive algorithms
,
greedy
1200
x17973
1375A
Sign Flipping
constructive algorithms
,
math
1100
x18948
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1444
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1949
1373E
Sum of Digits
brute force
,
constructive algorithms
,
dp
,
greedy
2200
x3012
1372C
Omkar and Baseball
constructive algorithms
,
math
1500
x19404
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x33726
1371D
Grid-00100
constructive algorithms
,
greedy
,
implementation
1600
x13828
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x5334
1370B
GCD Compression
constructive algorithms
,
math
,
number theory
1100
x25537
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x2493
1368C
Even Picture
constructive algorithms
1500
x14183
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x22118
1367D
Task On The Board
constructive algorithms
,
greedy
,
implementation
,
sortings
1800
x9030
1367C
Social Distance
constructive algorithms
,
greedy
,
math
1300
x25884
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x4723
1366D
Two Divisors
constructive algorithms
,
math
,
number theory
2000
x13026
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x1578
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4935
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x8538
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x21994
1365C
Rotation Matching
constructive algorithms
,
data structures
,
greedy
,
implementation
1400
x25533
1365B
Trouble Sort
constructive algorithms
,
implementation
1300
x29366
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x1808
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x5277
1364C
Ehab and Prefix MEXs
brute force
,
constructive algorithms
,
greedy
1600
x14693
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x2181
1361A
Johnny and Contribution
constructive algorithms
,
graphs
,
greedy
,
sortings
1700
x8930
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4955
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x8462
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x13888
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x37955
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x570
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x2502
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x997
1355D
Game With Array
constructive algorithms
,
math
1400
x19292
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x1578
1353D
Constructing the Array
constructive algorithms
,
data structures
,
sortings
1600
x21078
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x45393
1352G
Special Permutation
constructive algorithms
1600
x25900
1352F
Binary String Reconstruction
constructive algorithms
,
dfs and similar
,
math
1500
x20100
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x47704
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x127
1349B
Orac and Medians
constructive algorithms
,
greedy
,
math
2000
x9162
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x9468
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x15748
1348B
Phoenix and Beauty
constructive algorithms
,
data structures
,
greedy
,
sortings
1400
x28168
1344B
Monopole Magnets
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2000
x6433
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1439
1343B
Balanced Array
constructive algorithms
,
math
800
x67659
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x6436
1342B
Binary Period
constructive algorithms
,
strings
1100
x24850
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x1106
1339B
Sorted Adjacent Differences
constructive algorithms
,
sortings
1200
x28774
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x1172
1338C
Perfect Triples
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
math
2200
x3511
1338B
Edge Weight Assignment
bitmasks
,
constructive algorithms
,
dfs and similar
,
greedy
,
math
,
trees
1800
x9870
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x43908
1336D
Yui and Mahjong Set
constructive algorithms
,
interactive
3200
x647
1335D
Anti-Sudoku
constructive algorithms
,
implementation
1300
x29898
1335B
Construct the String
constructive algorithms
900
x43504
1334D
Minimum Euler Cycle
constructive algorithms
,
graphs
,
greedy
,
implementation
1800
x7839
1334C
Circle of Monsters
brute force
,
constructive algorithms
,
greedy
,
math
1600
x18390
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1865
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x4201
1333A
Little Artem
constructive algorithms
1000
x26156
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x4469
1332D
Walk on Matrix
bitmasks
,
constructive algorithms
,
math
1700
x8551
1332B
Composite Coloring
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1400
x19466
1329D
Dreamoon Likes Strings
constructive algorithms
,
data structures
3100
x568
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1853
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