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two pointers
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
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number theory
probabilities
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shortest paths
sortings
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strings
ternary search
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#
Name
1195E
OpenStreetMap
data structures
,
two pointers
2100
x2826
1156E
Special Segments of Permutation
data structures
,
divide and conquer
,
dsu
,
two pointers
2200
x2751
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2736
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2690
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2607
644B
Processing Queries
*special problem
,
constructive algorithms
,
data structures
,
two pointers
1700
x2603
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2590
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2559
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2531
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2528
1157F
Maximum Balanced Circle
constructive algorithms
,
dp
,
greedy
,
two pointers
2000
x2522
853B
Jury Meeting
greedy
,
sortings
,
two pointers
1800
x2503
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2491
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2456
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2416
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2361
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2231
190D
Non-Secret Cypher
two pointers
1900
x2231
46C
Hamsters and Tigers
two pointers
1600
x2216
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2212
1190D
Tokitsukaze and Strange Rectangle
data structures
,
divide and conquer
,
sortings
,
two pointers
2000
x2212
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2203
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2193
613B
Skills
binary search
,
brute force
,
dp
,
greedy
,
sortings
,
two pointers
1900
x2171
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2170
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2164
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2162
222D
Olympiad
binary search
,
greedy
,
sortings
,
two pointers
1900
x2127
1436E
Complicated Computations
binary search
,
data structures
,
two pointers
2400
x2113
229D
Towers
dp
,
greedy
,
two pointers
2100
x2101
1729G
Cut Substrings
combinatorics
,
dp
,
hashing
,
strings
,
two pointers
2100
x2059
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2041
1712E1
LCM Sum (easy version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
two pointers
2300
x2039
1181D
Irrigation
binary search
,
data structures
,
implementation
,
sortings
,
trees
,
two pointers
2200
x2019
1326E
Bombs
data structures
,
two pointers
2400
x1981
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1963
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1919
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1894
818E
Card Game Again
binary search
,
data structures
,
number theory
,
two pointers
1900
x1872
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1852
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1814
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1779
1272F
Two Bracket Sequences
dp
,
strings
,
two pointers
2200
x1751
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1742
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1728
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1719
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1716
1582F2
Korney Korneevich and XOR (hard version)
binary search
,
brute force
,
dp
,
greedy
,
two pointers
2400
x1709
391A
Genetic Engineering
implementation
,
two pointers
x1702
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1664
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1655
1706D2
Chopping Carrots (Hard Version)
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2400
x1653
620D
Professor GukiZ and Two Arrays
binary search
,
two pointers
2200
x1639
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1618
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1616
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1604
1698E
PermutationForces II
brute force
,
combinatorics
,
greedy
,
sortings
,
trees
,
two pointers
2300
x1572
1887C
Minimum Array
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
two pointers
2400
x1570
1497E2
Square-free division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1561
1592E
Bored Bakry
bitmasks
,
greedy
,
math
,
two pointers
2400
x1542
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1537
1805E
There Should Be a Lot of Maximums
brute force
,
data structures
,
dfs and similar
,
dp
,
trees
,
two pointers
2300
x1522
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1497
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1485
912E
Prime Gift
binary search
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
,
two pointers
2400
x1484
1418G
Three Occurrences
data structures
,
divide and conquer
,
hashing
,
two pointers
2500
x1459
1738E
Balance Addicts
combinatorics
,
dp
,
math
,
two pointers
2300
x1453
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1452
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x1448
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1441
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1441
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1439
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1423
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1389
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1332
1886E
I Wanna be the Team Leader
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
,
sortings
,
two pointers
2400
x1330
216D
Spider's Web
binary search
,
sortings
,
two pointers
1700
x1326
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x1302
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1291
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1288
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1270
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1267
1781E
Rectangle Shrinking
binary search
,
brute force
,
data structures
,
greedy
,
implementation
,
two pointers
2300
x1264
1736C2
Good Subarrays (Hard Version)
binary search
,
data structures
,
dp
,
two pointers
2400
x1234
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x1224
516D
Drazil and Morning Exercise
dfs and similar
,
dp
,
dsu
,
trees
,
two pointers
2800
x1223
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1213
1252E
Songwriter
greedy
,
two pointers
2200
x1211
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1205
958F2
Lightsabers (medium)
binary search
,
two pointers
1800
x1199
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1194
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1191
1797E
Li Hua and Array
brute force
,
data structures
,
dsu
,
math
,
number theory
,
two pointers
2300
x1188
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1183
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1182
1437F
Emotional Fishermen
combinatorics
,
dp
,
math
,
two pointers
2600
x1163
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1147
901C
Bipartite Segments
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
two pointers
2300
x1132
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1125
1699E
Three Days Grace
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2600
x1082
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