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Before contest
Codeforces Round (Div. 2)
5 days
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
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
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Custom test
Problems
#
Name
5B
Center Alignment
implementation
,
strings
1200
x6775
5A
Chat Servers Outgoing Traffic
implementation
1000
x11164
4D
Mysterious Present
dp
,
sortings
1700
x12181
4C
Registration System
data structures
,
hashing
,
implementation
1300
x109780
4B
Before an Exam
constructive algorithms
,
greedy
1200
x29605
4A
Watermelon
brute force
,
math
800
x692352
3D
Least Cost Bracket Sequence
greedy
2600
x3960
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x8304
3B
Lorry
greedy
,
sortings
1900
x5248
3A
Shortest path of the king
greedy
,
shortest paths
1000
x22236
2C
Commentator problem
geometry
2600
x2031
2B
The least round way
dp
,
math
2000
x13002
2A
Winner
hashing
,
implementation
1500
x31348
1C
Ancient Berland Circus
geometry
,
math
2100
x6502
1B
Spreadsheet
implementation
,
math
1600
x26424
1A
Theatre Square
math
1000
x321683
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