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Before contest
Codeforces Round 952 (Div. 4)
10:45:08
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Difficulty:
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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
16D
Logging
implementation
,
strings
1900
x1521
16C
Monitor
binary search
,
number theory
1800
x4563
15B
Laser
math
1800
x1306
14E
Camels
dp
1900
x1624
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4340
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3135
11B
Jumping Jack
math
1600
x4372
10B
Cinema Cashier
dp
,
implementation
1500
x1729
9D
How many trees?
combinatorics
,
divide and conquer
,
dp
1900
x3693
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4233
7C
Line
math
,
number theory
1800
x4407
7B
Memory Manager
implementation
1600
x2530
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3155
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12963
4D
Mysterious Present
dp
,
sortings
1700
x9896
4C
Registration System
data structures
,
hashing
,
implementation
1300
x78412
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7071
3B
Lorry
greedy
,
sortings
1900
x4396
2A
Winner
hashing
,
implementation
1500
x25326
1B
Spreadsheet
implementation
,
math
1600
x21872
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