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Rayan
→ Pay attention
Before contest
Educational Codeforces Round 174 (Rated for Div. 2)
20:43:07
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Difficulty:
—
combinatorics
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
57C
Array
combinatorics
,
math
1900
x2862
52B
Right Triangles
combinatorics
1600
x2113
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x418
44I
Toys
brute force
,
combinatorics
2300
x204
40E
Number Table
combinatorics
2500
x694
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x427
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x1077
26D
Tickets
combinatorics
,
math
,
probabilities
2400
x816
26C
Parquet
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2000
x878
15E
Triangles
combinatorics
,
dp
2600
x597
9D
How many trees?
combinatorics
,
divide and conquer
,
dp
1900
x3981
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