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Name
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x507
903F
Clear The Matrix
bitmasks
,
dp
2200
x623
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1252
903D
Almost Difference
data structures
,
math
2200
x3691
903C
Boxes Packing
greedy
1200
x16314
903B
The Modcrab
greedy
,
implementation
1200
x7572
903A
Hungry Student Problem
greedy
,
implementation
900
x14358
902B
Coloring a Tree
dfs and similar
,
dsu
,
greedy
1200
x10447
902A
Visiting a Friend
greedy
,
implementation
1100
x9676
901E
Cyclic Cipher
fft
,
math
3300
x84
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x428
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1131
901B
GCD of Polynomials
constructive algorithms
,
math
2200
x1373
901A
Hashing Trees
constructive algorithms
,
trees
1500
x5005
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1027
900D
Unusual Sequences
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
2000
x2969
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4408
900B
Position in Fraction
math
,
number theory
1300
x7620
900A
Find Extra One
geometry
,
implementation
800
x13347
899F
Letters Removing
data structures
,
strings
2100
x1571
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2731
899D
Shovel Sale
constructive algorithms
,
math
1800
x2677
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8258
899B
Months and Years
implementation
1200
x5746
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10072
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1121
898E
Squares and not squares
constructive algorithms
,
greedy
1600
x4482
898D
Alarm Clock
greedy
1600
x3607
898C
Phone Numbers
implementation
,
strings
1400
x5126
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9247
898A
Rounding
implementation
,
math
800
x15584
897B
Chtholly's request
brute force
1300
x7074
897A
Scarborough Fair
implementation
800
x13915
896E
Welcome home, Chtholly
data structures
,
dsu
3100
x1960
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x516
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3133
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2047
896A
Nephren gives a riddle
binary search
,
dfs and similar
1700
x3335
895E
Eyes Closed
data structures
,
probabilities
2300
x907
895D
String Mark
combinatorics
,
math
,
strings
2100
x1086
895C
Square Subsets
bitmasks
,
combinatorics
,
dp
,
math
2000
x5103
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3416
895A
Pizza Separation
brute force
,
implementation
1200
x6448
894E
Ralph and Mushrooms
dp
,
graphs
2100
x2135
894D
Ralph And His Tour in Binary Country
brute force
,
data structures
,
trees
2200
x1105
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4277
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4369
894A
QAQ
brute force
,
dp
800
x32790
893F
Subtree Minimum Query
data structures
,
trees
2300
x1655
893E
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
2000
x3248
893D
Credit Card
data structures
,
dp
,
greedy
,
implementation
1900
x2913
893C
Rumor
dfs and similar
,
graphs
,
greedy
1300
x21555
893B
Beautiful Divisors
brute force
,
implementation
1000
x10925
893A
Chess For Three
implementation
900
x10009
892B
Wrath
greedy
,
implementation
,
two pointers
1200
x8654
892A
Greed
greedy
,
implementation
900
x13191
891E
Lust
combinatorics
,
math
,
matrices
3000
x841
891D
Sloth
dfs and similar
,
dp
,
graph matchings
,
trees
3100
x169
891C
Envy
data structures
,
dsu
,
graphs
2300
x2212
891B
Gluttony
constructive algorithms
,
greedy
2000
x2895
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9581
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x513
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x3871
888F
Connecting Vertices
dp
,
graphs
2500
x743
888E
Maximum Subsequence
bitmasks
,
divide and conquer
,
meet-in-the-middle
1800
x6576
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x7587
888C
K-Dominant Character
binary search
,
implementation
,
two pointers
1400
x8051
888B
Buggy Robot
greedy
1000
x9512
888A
Local Extrema
brute force
,
implementation
800
x10652
887F
Row of Models
greedy
,
sortings
2500
x160
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x162
887D
Ratings and Reality Shows
data structures
,
two pointers
2400
x471
887C
Solution for Cube
brute force
,
implementation
1500
x2833
887B
Cubes for Masha
brute force
,
implementation
1300
x5527
887A
Div. 64
implementation
1000
x10926
886F
Symmetric Projections
geometry
2900
x262
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x972
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1719
886C
Petya and Catacombs
dsu
,
greedy
,
implementation
,
trees
1300
x5425
886B
Vlad and Cafes
1000
x7774
886A
ACM ICPC
brute force
1000
x10070
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x935
884E
Binary Matrix
dsu
2500
x668
884D
Boxes And Balls
data structures
,
greedy
2300
x1869
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4610
884B
Japanese Crosswords Strike Back
implementation
1100
x6792
884A
Book Reading
implementation
800
x10329
883M
Quadcopter Competition
greedy
,
math
1100
x3487
883L
Berland.Taxi
data structures
2500
x227
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1070
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x556
883I
Photo Processing
binary search
,
dp
1900
x1889
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1564
883G
Orientation of Edges
dfs and similar
,
graphs
1900
x1382
883F
Lost in Transliteration
implementation
1300
x2232
883E
Field of Wonders
implementation
,
strings
1500
x1876
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x349
883C
Downloading B++
binary search
,
implementation
2300
x614
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x322
883A
Automatic Door
implementation
2200
x573
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Before contest
Codeforces Round 941 (Div. 1)
37:09:30
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Before contest
Codeforces Round 941 (Div. 2)
37:09:30
Register now »
*has extra registration
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combine-tags-by-or
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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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