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Problems
#
Name
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1088
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1087
377D
Developing Game
data structures
2400
x1087
997E
Good Subsegments
data structures
3000
x1085
1089K
King Kog's Reception
data structures
2400
x1081
713D
Animals and Puzzle
binary search
,
data structures
2700
x1079
1623E
Middle Duplication
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
2500
x1078
1619H
Permutation and Queries
brute force
,
data structures
,
divide and conquer
,
two pointers
2400
x1075
174C
Range Increments
data structures
,
greedy
1800
x1069
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1068
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1066
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x1065
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1062
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1059
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1055
1654F
Minimal String Xoration
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
hashing
,
sortings
,
strings
2800
x1054
1136E
Nastya Hasn't Written a Legend
binary search
,
data structures
2200
x1044
452E
Three strings
data structures
,
dsu
,
string suffix structures
,
strings
2400
x1039
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1032
878B
Teams Formation
data structures
,
implementation
2300
x1031
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1030
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1029
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1028
1735E
House Planning
constructive algorithms
,
data structures
,
graph matchings
,
greedy
2400
x1023
1774F1
Magician and Pigs (Easy Version)
brute force
,
data structures
,
implementation
2400
x1022
1716E
Swap and Maximum Block
bitmasks
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
2500
x1022
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1022
802B
Heidi and Library (medium)
data structures
,
greedy
1800
x1020
1585E
Frequency Queries
data structures
,
dfs and similar
,
trees
2400
x1018
1794E
Labeling the Tree with Distances
data structures
,
dp
,
greedy
,
hashing
,
implementation
,
trees
2400
x1016
847D
Dog Show
constructive algorithms
,
data structures
,
greedy
2200
x1015
351D
Jeff and Removing Periods
data structures
2700
x1014
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1010
1858E2
Rollbacks (Hard Version)
data structures
,
interactive
,
trees
2600
x1008
1192B
Dynamic Diameter
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
trees
x1005
707E
Garlands
data structures
2400
x1005
1200F
Graph Traveler
brute force
,
data structures
,
dfs and similar
,
dp
,
graphs
,
implementation
,
math
,
number theory
2300
x1002
66C
Petya and File System
data structures
,
implementation
1800
x997
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x995
1662L
Il Derby della Madonnina
data structures
,
dp
,
math
x994
587F
Duff is Mad
data structures
,
strings
3000
x992
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x990
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x988
1037H
Security
data structures
,
string suffix structures
3200
x984
1635F
Closest Pair
data structures
,
greedy
2800
x980
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x979
1625E1
Cats on the Upgrade (easy version)
brute force
,
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
trees
2500
x977
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x977
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x975
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x972
1422F
Boring Queries
data structures
,
math
,
number theory
2700
x971
1044D
Deduction Queries
data structures
,
dsu
2400
x971
1207G
Indie Album
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
2700
x969
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x969
1503D
Flip the Cards
2-sat
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
2600
x968
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x968
1662F
Antennas
data structures
,
dfs and similar
,
graphs
,
graphs
,
implementation
,
implementation
,
shortest paths
,
shortest paths
x966
1132G
Greedy Subsequences
data structures
,
dp
,
trees
2400
x960
46D
Parking Lot
data structures
,
implementation
1800
x959
653F
Paper task
data structures
,
string suffix structures
,
strings
2600
x957
85B
Embassy Queue
data structures
,
greedy
1800
x957
1647E
Madoka and the Sixth-graders
data structures
,
dfs and similar
,
greedy
2500
x956
70D
Professor's task
data structures
,
geometry
2700
x956
442D
Adam and Tree
data structures
,
trees
2600
x954
1437G
Death DBMS
data structures
,
string suffix structures
,
strings
,
trees
2600
x953
1129D
Isolation
data structures
,
dp
2900
x951
338E
Optimize!
data structures
2600
x947
1389F
Bicolored Segments
data structures
,
dp
,
graph matchings
,
sortings
2600
x946
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x945
1906F
Maximize The Value
data structures
,
sortings
2100
x941
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x939
1725F
Field Photography
bitmasks
,
data structures
,
sortings
2100
x938
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x934
1793E
Velepin and Marketing
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2600
x932
1037F
Maximum Reduction
combinatorics
,
data structures
,
math
2500
x931
1566F
Points Movement
data structures
,
dp
,
greedy
,
implementation
,
sortings
2600
x928
1539E
Game with Cards
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2500
x925
46E
Comb
data structures
,
dp
1900
x925
1558D
Top-Notch Insertions
combinatorics
,
data structures
2600
x924
220C
Little Elephant and Shifts
data structures
2100
x924
643G
Choosing Ads
data structures
3200
x916
1672H
Zigu Zagu
constructive algorithms
,
data structures
,
greedy
2700
x915
799E
Aquarium decoration
data structures
,
greedy
,
two pointers
2500
x914
1661E
Narrow Components
brute force
,
data structures
,
dp
,
dsu
,
math
,
trees
2500
x911
926E
Merge Equal Elements
constructive algorithms
,
data structures
1900
x911
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x911
895E
Eyes Closed
data structures
,
probabilities
2300
x908
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x907
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x902
1374E2
Reading Books (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
ternary search
,
two pointers
2500
x901
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x898
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x897
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x895
1889C2
Doremy's Drying Plan (Hard Version)
data structures
,
dp
2600
x891
1701F
Points
combinatorics
,
data structures
,
implementation
,
math
,
matrices
2500
x889
878C
Tournament
data structures
,
graphs
2700
x888
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x885
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x884
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