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Before contest
Codeforces Round 973 (Div. 2)
3 days
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*has extra registration
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Difficulty:
—
implementation
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
11C
How Many Squares?
implementation
2200
x613
11A
Increasing Sequence
constructive algorithms
,
implementation
,
math
900
x13171
10B
Cinema Cashier
dp
,
implementation
1500
x1764
10A
Power Consumption Calculation
implementation
900
x7098
9C
Hexadecimal's Numbers
brute force
,
implementation
,
math
1200
x12890
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5486
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4325
7E
Defining Macros
dp
,
expression parsing
,
implementation
2600
x708
7B
Memory Manager
implementation
1600
x2591
6B
President's Office
implementation
1100
x12904
5D
Follow Traffic Rules
implementation
,
math
2100
x1697
5B
Center Alignment
implementation
,
strings
1200
x5837
5A
Chat Servers Outgoing Traffic
implementation
1000
x9653
4C
Registration System
data structures
,
hashing
,
implementation
1300
x82287
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x7287
2A
Winner
hashing
,
implementation
1500
x26184
1B
Spreadsheet
implementation
,
math
1600
x22509
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