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Before contest
Educational Codeforces Round 167 (Rated for Div. 2)
23:37:32
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Difficulty:
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dfs and similar
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
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4457
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2389
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5204
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1565
19E
Fairy
dfs and similar
,
divide and conquer
,
dsu
2900
x1666
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4568
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4360
9E
Interestring graph and Apples
dfs and similar
,
dsu
,
graphs
2300
x997
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