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dfs and similar
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Problems
#
Name
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x722
741E
Arpa’s abnormal DNA and Mehrdad’s deep interest
data structures
,
string suffix structures
3400
x173
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2434
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2043
739C
Alyona and towers
data structures
2500
x1391
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4417
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1088
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x858
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4130
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2749
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1147
730L
Expression Queries
data structures
3200
x81
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2132
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1112
725D
Contest Balloons
data structures
,
greedy
1800
x2670
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2249
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x469
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3072
722C
Destroying Array
data structures
,
dsu
1600
x8788
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2250
720F
Array Covering
data structures
3100
x143
720D
Slalom
data structures
,
dp
,
sortings
3100
x222
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3358
717F
Heroes of Making Magic III
data structures
2600
x285
713D
Animals and Puzzle
binary search
,
data structures
2700
x1074
713A
Sonya and Queries
data structures
,
implementation
1400
x8318
712E
Memory and Casinos
data structures
,
math
,
probabilities
2500
x601
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1663
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2971
707E
Garlands
data structures
2400
x999
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2592
706E
Working routine
data structures
,
implementation
2500
x1114
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9226
704E
Iron Man
data structures
,
geometry
,
trees
3300
x272
704A
Thor
brute force
,
data structures
,
implementation
1600
x8925
703D
Mishka and Interesting sum
data structures
2100
x3320
702F
T-Shirts
data structures
2800
x1145
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2261
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11288
701B
Cells Not Under Attack
data structures
,
math
1200
x11567
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x447
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x476
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1217
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x5970
690B3
Recover Polygon (hard)
data structures
2600
x90
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1806
689D
Friends and Subsequences
binary search
,
data structures
2100
x3053
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x849
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3762
681C
Heap Operations
constructive algorithms
,
data structures
,
greedy
1600
x7245
679E
Bear and Bad Powers of 42
data structures
3100
x658
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x822
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1520
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2596
675D
Tree Construction
data structures
,
trees
1800
x3569
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3415
671E
Organizing a Race
data structures
,
greedy
3300
x394
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1106
671C
Ultimate Weirdness of an Array
data structures
,
number theory
2800
x660
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3139
666E
Forensic Examination
data structures
,
string suffix structures
3100
x1288
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x576
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2853
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1503
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7292
653F
Paper task
data structures
,
string suffix structures
,
strings
2600
x949
652D
Nested Segments
data structures
,
sortings
1800
x3782
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x585
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1185
650A
Watchmen
data structures
,
geometry
,
math
1400
x15024
649E
Автобус
binary search
,
data structures
,
greedy
,
sortings
2100
x103
648D
Собачки и миски
data structures
,
greedy
,
sortings
1900
x221
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2601
643G
Choosing Ads
data structures
3200
x910
641E
Little Artem and Time Machine
data structures
2000
x2903
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x393
639D
Bear and Contribution
data structures
,
greedy
,
sortings
,
two pointers
2400
x778
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1947
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14974
633H
Fibonacci-ish II
data structures
,
implementation
3100
x562
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x710
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x567
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2595
631E
Product Sum
data structures
,
dp
,
geometry
2600
x2195
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1979
631C
Report
data structures
,
sortings
1700
x3681
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x966
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x3858
628E
Zbazi in Zeydabad
data structures
,
implementation
2300
x827
627C
Package Delivery
data structures
,
divide and conquer
,
greedy
2200
x1145
627B
Factory Repairs
data structures
1700
x2642
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x517
625E
Frog Fights
data structures
,
greedy
2800
x323
622C
Not Equal on a Segment
data structures
,
implementation
1700
x6177
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x699
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5159
618E
Robot Arm
data structures
,
geometry
2500
x585
617E
XOR and Favorite Number
data structures
2200
x7742
616D
Longest k-Good Segment
binary search
,
data structures
,
two pointers
1600
x8705
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