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#
Name
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x325
1970E3
Trails (Hard)
dp
,
matrices
2200
x379
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1375
1967B2
Reverse Card (Hard Version)
brute force
,
math
,
number theory
2200
x3086
1954E
Chain Reaction
binary search
,
data structures
,
dsu
,
greedy
,
implementation
,
math
,
number theory
2200
x1816
1949F
Dating
greedy
,
sortings
,
trees
2200
x775
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2122
1938E
Duplicates
2200
x867
1926F
Vlad and Avoiding X
bitmasks
,
brute force
,
dfs and similar
,
dp
,
implementation
2200
x1505
1921G
Mischievous Shooter
brute force
,
data structures
,
divide and conquer
,
dp
,
implementation
2200
x1132
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1564
1912E
Evaluate It and Back Again
constructive algorithms
,
implementation
,
math
2200
x777
1909F1
Small Permutation Problem (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2200
x1643
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1760
1906H
Twin Friends
combinatorics
,
dp
2200
x611
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1379
1898E
Sofia and Strings
data structures
,
greedy
,
sortings
,
strings
,
two pointers
2200
x2061
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x2993
1860D
Balanced String
dp
2200
x2798
1858D
Trees and Segments
brute force
,
data structures
,
dp
,
greedy
,
two pointers
2200
x2712
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3354
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2517
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x1887
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2235
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1709
1837E
Playoff Fixing
combinatorics
,
trees
2200
x2103
1832E
Combinatorics Problem
brute force
,
combinatorics
,
dp
2200
x2061
1822G2
Magic Triples (Hard Version)
brute force
,
data structures
,
math
,
number theory
2200
x2316
1815C
Between
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2200
x1872
1811G2
Vlad and the Nice Paths (hard version)
binary search
,
combinatorics
,
data structures
,
dp
,
math
,
two pointers
2200
x1626
1808E1
Minibuses on Venus (easy version)
combinatorics
,
divide and conquer
,
dp
2200
x1254
1806E
Tree Master
brute force
,
data structures
,
dfs and similar
,
trees
2200
x2694
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1937
1795E
Explosions?
binary search
,
data structures
,
dp
,
greedy
,
math
2200
x1922
1789D
Serval and Shift-Shift-Shift
bitmasks
,
brute force
,
constructive algorithms
,
implementation
2200
x1579
1788E
Sum Over Zero
data structures
,
dfs and similar
,
dp
2200
x2481
1784C
Monsters (hard version)
data structures
,
greedy
2200
x1531
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1699
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1245
1773B
BinCoin
binary search
,
divide and conquer
,
hashing
,
implementation
,
probabilities
,
trees
2200
x736
1772G
Gaining Rating
binary search
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
2200
x1274
1769D2
Игра в Девятку II
*special problem
,
brute force
2200
x186
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1193
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x588
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1702
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1963
1741G
Kirill and Company
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1425
1737D
Ela and the Wiring Wizard
brute force
,
dp
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x1813
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2403
1730D
Prefixes and Suffixes
constructive algorithms
,
strings
,
two pointers
2200
x2598
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1818
1717E
Madoka and The Best University
math
,
number theory
2200
x2484
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2227
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2093
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x2093
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1674
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1384
1666F
Fancy Stack
combinatorics
,
dp
,
implementation
2200
x1111
1659E
AND-MEX Walk
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2200
x1468
1657E
Star MST
combinatorics
,
dp
,
graph matchings
,
math
2200
x1993
1656E
Equal Tree Sums
constructive algorithms
,
dfs and similar
,
math
,
trees
2200
x3305
1650F
Vitaly and Advanced Useless Algorithms
dp
,
greedy
,
implementation
2200
x1385
1646E
Power Board
brute force
,
dp
,
math
,
number theory
2200
x2302
1641C
Anonymity Is Important
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2200
x2332
1635E
Cars
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2200
x2168
1630C
Paint the Middle
dp
,
greedy
,
sortings
,
two pointers
2200
x2838
1627E
Not Escaping
data structures
,
dp
,
implementation
,
shortest paths
,
two pointers
2200
x2246
1622E
Math Test
bitmasks
,
brute force
,
greedy
2200
x1838
1618G
Trader Problem
data structures
,
dsu
,
greedy
,
sortings
2200
x1482
1616E
Lexicographically Small Enough
brute force
,
data structures
,
greedy
,
strings
2200
x2388
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1842
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1197
1607G
Banquet Preparations 1
greedy
2200
x1517
1593G
Changing Brackets
constructive algorithms
,
data structures
,
dp
,
greedy
2200
x1622
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2162
1580C
Train Maintenance
brute force
,
data structures
,
implementation
2200
x1676
1579G
Minimal Coverage
dp
2200
x2274
1575K
Knitting Batik
implementation
,
math
2200
x621
1575H
Holiday Wall Ornaments
dp
,
strings
2200
x583
1575G
GCD Festival
math
,
number theory
2200
x642
1567E
Non-Decreasing Dilemma
data structures
,
divide and conquer
,
math
2200
x3510
1562D2
Two Hundred Twenty One (hard version)
data structures
,
math
2200
x2079
1559E
Mocha and Stars
combinatorics
,
dp
,
fft
,
math
,
number theory
2200
x2217
1557D
Ezzat and Grid
data structures
,
dp
,
greedy
2200
x2478
1556E
Equilibrium
data structures
,
dp
,
greedy
2200
x2514
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2788
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1751
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x1946
1542D
Priority Queue
combinatorics
,
dp
,
implementation
,
math
,
ternary search
2200
x2533
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2360
1537E2
Erase and Extend (Hard Version)
binary search
,
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
,
two pointers
2200
x4991
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2641
1526D
Kill Anton
brute force
,
constructive algorithms
,
data structures
,
math
,
strings
2200
x2358
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3512
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2900
1515E
Phoenix and Computers
combinatorics
,
dp
,
math
2200
x3373
1505I
Mysterious language again, seriously?
*special problem
2200
x538
1505F
Math
*special problem
,
math
2200
x1471
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3204
1500B
Two chandeliers
binary search
,
brute force
,
chinese remainder theorem
,
math
,
number theory
2200
x1988
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2-sat
binary search
bitmasks
brute force
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combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
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geometry
graph matchings
graphs
greedy
hashing
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math
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