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Before contest
Codeforces Round 973 (Div. 2)
13:26:56
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*has extra registration
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Difficulty:
—
hashing
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
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1775
65D
Harry Potter and the Sorting Hat
brute force
,
dfs and similar
,
hashing
2200
x424
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x757
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2949
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x735
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x606
25E
Test
hashing
,
strings
2200
x2427
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1084
7D
Palindrome Degree
hashing
,
strings
2200
x3702
4C
Registration System
data structures
,
hashing
,
implementation
1300
x82359
2A
Winner
hashing
,
implementation
1500
x26194
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