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Educational Codeforces Round 165 (Rated for Div. 2)
26:17:20
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data structures
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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Problems
#
Name
1585D
Yet Another Sorting Problem
data structures
,
math
1900
x3624
1252C
Even Path
data structures
,
implementation
1600
x3620
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3619
1076E
Vasya and a Tree
data structures
,
trees
1900
x3607
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3589
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3577
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3577
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3570
675D
Tree Construction
data structures
,
trees
1800
x3570
1580A
Portal
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x3541
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3535
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3517
446B
DZY Loves Modification
brute force
,
data structures
,
greedy
2000
x3514
1000F
One Occurrence
data structures
,
divide and conquer
2400
x3504
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3499
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3499
1567E
Non-Decreasing Dilemma
data structures
,
divide and conquer
,
math
2200
x3497
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3476
1667B
Optimal Partition
data structures
,
dp
2100
x3465
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3460
961E
Tufurama
data structures
1900
x3435
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3415
1921F
Sum of Progression
brute force
,
data structures
,
dp
,
implementation
,
math
1900
x3408
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3407
940E
Cashback
data structures
,
dp
,
greedy
,
math
2000
x3400
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3385
818D
Multicolored Cars
data structures
,
implementation
1700
x3381
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3380
1406D
Three Sequences
constructive algorithms
,
data structures
,
greedy
,
math
2200
x3364
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3364
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3347
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3347
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3343
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3332
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3322
703D
Mishka and Interesting sum
data structures
2100
x3321
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3320
1288E
Messenger Simulator
data structures
2000
x3319
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3317
1738D
Permutation Addicts
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
1900
x3313
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3307
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3260
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3243
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3221
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3212
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3202
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3195
311B
Cats Transport
data structures
,
dp
2400
x3184
1175E
Minimal Segment Cover
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
implementation
,
trees
2200
x3181
446C
DZY Loves Fibonacci Numbers
data structures
,
math
,
number theory
2400
x3171
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3147
863D
Yet Another Array Queries Problem
data structures
,
implementation
1800
x3135
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3133
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3120
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3095
566D
Restructuring Company
data structures
,
dsu
1900
x3088
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3082
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3067
1477B
Nezzar and Binary String
data structures
,
greedy
1900
x3060
689D
Friends and Subsequences
binary search
,
data structures
2100
x3055
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3054
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3031
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3031
1699D
Almost Triple Deletions
data structures
,
dp
,
greedy
2300
x3021
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x2989
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2987
1889C1
Doremy's Drying Plan (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x2986
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2974
1204D2
Kirk and a Binary String (hard version)
data structures
,
greedy
,
math
,
strings
2100
x2971
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2964
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x2961
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2959
1644E
Expand the Path
brute force
,
combinatorics
,
data structures
,
implementation
,
math
1900
x2959
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2947
863E
Turn Off The TV
data structures
,
sortings
2000
x2944
522D
Closest Equals
*special problem
,
data structures
2000
x2941
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x2930
893D
Credit Card
data structures
,
dp
,
greedy
,
implementation
1900
x2915
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2915
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2911
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2908
641E
Little Artem and Time Machine
data structures
2000
x2907
1320C
World of Darkraft: Battle for Azathoth
brute force
,
data structures
,
sortings
2000
x2895
145E
Lucky Queries
data structures
2400
x2894
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2891
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2888
1218F
Workout plan
data structures
,
greedy
1500
x2875
1077F2
Pictures with Kittens (hard version)
data structures
,
dp
2100
x2865
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x2860
1648C
Tyler and Strings
combinatorics
,
data structures
,
implementation
1900
x2859
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2854
1092D2
Great Vova Wall (Version 2)
data structures
,
implementation
2200
x2825
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2803
455D
Serega and Fun
data structures
2700
x2802
1538E
Funny Substrings
data structures
,
hashing
,
implementation
,
matrices
,
strings
2100
x2799
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2797
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2788
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2778
444C
DZY Loves Colors
data structures
2400
x2774
840D
Destiny
data structures
,
probabilities
2500
x2761
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