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binary search
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
1814D
Balancing Weapons
binary search
,
brute force
,
data structures
,
math
,
two pointers
2500
x818
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x854
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x857
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x876
1835B
Lottery
binary search
,
brute force
,
greedy
,
math
,
two pointers
2500
x903
1539E
Game with Cards
binary search
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2500
x925
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x945
1771F
Hossam and Range Minimum Query
binary search
,
bitmasks
,
data structures
,
hashing
,
probabilities
,
strings
,
trees
2500
x966
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1068
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1069
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1119
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1122
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1257
992E
Nastya and King-Shamans
binary search
,
data structures
2500
x1267
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1270
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1292
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1305
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1337
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1362
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1384
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1439
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1511
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1581
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1650
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2090
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2166
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2249
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x256
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x286
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x297
198C
Delivering Carcinogen
binary search
,
geometry
2400
x369
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x401
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x465
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x568
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
845E
Fire in the City
binary search
,
data structures
2400
x579
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x615
796E
Exam Cheating
binary search
,
dp
2400
x625
1866L
Lihmuf Balling
binary search
,
brute force
,
math
2400
x651
853D
Michael and Charging Stations
binary search
,
dp
,
greedy
2400
x653
1780G
Delicious Dessert
binary search
,
dsu
,
hashing
,
math
,
number theory
,
string suffix structures
2400
x671
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x738
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x762
1809E
Two Tanks
binary search
,
dp
,
implementation
,
math
2400
x791
865C
Gotta Go Fast
binary search
,
dp
2400
x812
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x836
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x865
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x907
1016E
Rest In The Shades
binary search
,
geometry
2400
x929
1221F
Choose a Square
binary search
,
data structures
,
sortings
2400
x975
1091E
New Year and the Acquaintance Estimation
binary search
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
sortings
2400
x976
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x988
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x997
125E
MST Company
binary search
,
graphs
2400
x1006
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1010
1795F
Blocking Chips
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2400
x1049
1578L
Labyrinth
binary search
,
dsu
,
greedy
2400
x1052
808F
Card Game
binary search
,
flows
,
graphs
2400
x1090
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1097
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1110
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1126
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1240
1101F
Trucks and Cities
binary search
,
dp
2400
x1261
626E
Simple Skewness
binary search
,
math
,
ternary search
2400
x1296
1780E
Josuke and Complete Graph
binary search
,
brute force
,
data structures
,
math
,
number theory
2400
x1305
1598F
RBS
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
2400
x1322
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1354
1750E
Bracket Cost
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
,
strings
2400
x1360
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1366
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1443
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1449
1633E
Spanning Tree Queries
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1458
1743E
FTL
binary search
,
dp
2400
x1482
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1487
1027F
Session in BSU
binary search
,
dfs and similar
,
dsu
,
graph matchings
,
graphs
2400
x1506
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1527
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1576
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1618
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1710
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1724
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1733
1827B2
Range Sorting (Hard Version)
binary search
,
data structures
,
dp
,
greedy
2400
x1774
1832D2
Red-Blue Operations (Hard Version)
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
2400
x1794
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1940
1837F
Editorial for Two
binary search
,
data structures
,
greedy
,
implementation
2400
x2070
1436E
Complicated Computations
binary search
,
data structures
,
two pointers
2400
x2114
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2164
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2377
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2967
1488F
Dogecoin
*special problem
,
*special problem
,
binary search
,
data structures
2300
x167
78D
Archer's Shot
binary search
,
geometry
,
math
,
two pointers
2300
x301
518F
Pasha and Pipe
binary search
,
brute force
,
combinatorics
,
dp
,
implementation
2300
x352
1575B
Building an Amusement Park
binary search
,
geometry
2300
x450
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x477
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x557
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x582
76F
Tourist
binary search
,
data structures
,
dp
2300
x603
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