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Before contest
Codeforces Round #698 (Div. 1)
47:17:21
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Before contest
Codeforces Round #698 (Div. 2)
47:17:21
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2-sat
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
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shortest paths
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string suffix structures
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ternary search
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Name
1089H
Harder Satisfiability
2-sat
,
dfs and similar
,
graphs
3400
x63
1007D
Ants
2-sat
,
data structures
,
trees
3200
x113
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x299
587D
Duff in Mafia
2-sat
,
binary search
3100
x366
1215F
Radio Stations
2-sat
2700
x398
568C
New Language
2-sat
,
greedy
2600
x563
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x198
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x1047
1385G
Columns Swaps
2-sat
,
dfs and similar
,
dsu
,
graphs
,
implementation
2300
x813
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x1552
1218I
The Light Square
2-sat
,
dfs and similar
,
greedy
2100
x400
875C
National Property
2-sat
,
dfs and similar
,
graphs
,
implementation
2100
x1504
468B
Two Sets
2-sat
,
dfs and similar
,
dsu
,
graph matchings
,
greedy
2000
x2864
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x3003
1438C
Engineer Artem
2-sat
,
chinese remainder theorem
,
constructive algorithms
,
fft
,
flows
2000
x6402
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x1602
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2501
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x11589
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