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Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
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dfs and similar
combine-tags-by-or
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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
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greedy
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implementation
interactive
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Problems
#
Name
1498D
Bananas in a Microwave
dfs and similar
,
dp
,
graphs
,
implementation
2200
x2246
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2238
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2238
1598E
Staircases
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
dp
,
implementation
,
math
2100
x2231
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2230
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2217
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2216
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2206
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2185
986C
AND Graph
bitmasks
,
dfs and similar
,
dsu
,
graphs
2500
x2183
1141G
Privatization of Roads in Treeland
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x2182
1635E
Cars
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2200
x2161
1583E
Moment of Bloom
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
,
trees
2200
x2160
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2156
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2153
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2132
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2124
1876C
Autosynthesis
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
sortings
2100
x2122
196B
Infinite Maze
dfs and similar
,
graphs
2000
x2119
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2114
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2097
1208F
Bits And Pieces
bitmasks
,
dfs and similar
,
dp
,
greedy
2600
x2092
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2084
1695D1
Tree Queries (Easy Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x2079
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2069
466E
Information Graph
dfs and similar
,
dsu
,
graphs
,
trees
2100
x2052
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x2041
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2039
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2028
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2021
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2018
1369E
DeadLee
data structures
,
dfs and similar
,
greedy
,
implementation
,
sortings
2400
x2013
788C
The Great Mixing
dfs and similar
,
graphs
,
shortest paths
2300
x2001
909E
Coprocessor
dfs and similar
,
dp
,
graphs
,
greedy
1900
x1983
949C
Data Center Maintenance
dfs and similar
,
graphs
1900
x1981
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x1972
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1964
1335F
Robots on a Grid
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
matrices
2200
x1958
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1946
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x1939
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1937
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1926
1800G
Symmetree
dfs and similar
,
hashing
,
implementation
,
trees
2200
x1915
1695D2
Tree Queries (Hard Version)
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1909
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1906
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x1905
1178F1
Short Colorful Strip
combinatorics
,
dfs and similar
,
dp
2200
x1901
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x1901
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1890
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1882
1607F
Robot on the Board 2
brute force
,
dfs and similar
,
graphs
,
implementation
2300
x1881
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1866
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x1862
1815C
Between
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2200
x1842
1615D
X(or)-mas Tree
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
trees
2200
x1835
1527D
MEX Tree
combinatorics
,
dfs and similar
,
implementation
,
math
,
trees
2400
x1821
1721E
Prefix Function Queries
dfs and similar
,
dp
,
hashing
,
string suffix structures
,
strings
,
trees
2200
x1805
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1805
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1805
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1801
527E
Data Center Drama
dfs and similar
,
graphs
2600
x1801
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1799
412D
Giving Awards
dfs and similar
2000
x1796
1394B
Boboniu Walks on Graph
brute force
,
dfs and similar
,
graphs
,
hashing
2300
x1783
1900E
Transitive Graph
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
2100
x1777
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1761
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1754
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1748
797D
Broken BST
data structures
,
dfs and similar
2100
x1747
1551F
Equidistant Vertices
brute force
,
combinatorics
,
dfs and similar
,
dp
,
trees
2200
x1740
1691E
Number of Groups
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2300
x1739
1278E
Tests for problem D
constructive algorithms
,
dfs and similar
,
divide and conquer
,
trees
2200
x1735
1907G
Lights
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
2200
x1729
553C
Love Triangles
dfs and similar
,
dsu
,
graphs
2200
x1725
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1720
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1717
1811F
Is It Flower?
dfs and similar
,
graphs
,
implementation
2100
x1714
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1702
1158C
Permutation recovery
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
math
,
sortings
2100
x1695
1637F
Towers
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2500
x1690
1840F
Railguns
brute force
,
dfs and similar
,
dp
,
graphs
2200
x1688
213A
Game
dfs and similar
,
greedy
1700
x1686
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1685
1238F
The Maximum Subtree
dfs and similar
,
dp
,
graphs
,
trees
2200
x1684
1777E
Edge Reverse
binary search
,
dfs and similar
,
graphs
,
trees
2200
x1681
1844E
Great Grids
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2400
x1680
1515F
Phoenix and Earthquake
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2600
x1679
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1678
1670E
Hemose on the Tree
bitmasks
,
constructive algorithms
,
dfs and similar
,
trees
2200
x1662
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1658
212E
IT Restaurants
dfs and similar
,
dp
,
trees
1500
x1655
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1650
859E
Desk Disorder
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x1640
1344C
Quantifier Question
dfs and similar
,
dp
,
graphs
,
math
2600
x1639
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1637
1092E
Minimal Diameter Forest
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2000
x1614
804C
Ice cream coloring
constructive algorithms
,
dfs and similar
,
greedy
2200
x1611
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x1604
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1601
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1600
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