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Before contest
Codeforces Round 973 (Div. 2)
02:43:32
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Difficulty:
—
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
x1562
15C
Industrial Nim
games
2000
x2275
14E
Camels
dp
1900
x1691
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4487
13B
Letter A
geometry
,
implementation
2000
x992
12E
Start of the session
constructive algorithms
2100
x1207
10C
Digital Root
number theory
2000
x1436
9D
How many trees?
combinatorics
,
divide and conquer
,
dp
1900
x3844
8C
Looking for Order
bitmasks
,
dp
2000
x3514
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3266
5D
Follow Traffic Rules
implementation
,
math
2100
x1697
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x13659
3B
Lorry
greedy
,
sortings
1900
x4542
2B
The least round way
dp
,
math
2000
x10806
1C
Ancient Berland Circus
geometry
,
math
2100
x5672
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