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Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
36:48:56
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Difficulty:
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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
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6292
411A
Password Check
*special problem
,
implementation
800
x6957
1331B
Limericks
*special problem
,
math
,
number theory
x6976
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8645
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8656
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8866
1663A
Who Tested?
*special problem
,
expression parsing
,
trees
x10386
1331D
Again?
*special problem
,
implementation
x11856
1812A
Are You a Robot?
*special problem
,
*special problem
,
*special problem
,
expression parsing
,
strings
x13037
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x13961
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14991
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x15693
1331A
Is it rated?
*special problem
x16995
770A
New Password
*special problem
,
implementation
800
x18649
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82234
158A
Next Round
*special problem
,
implementation
800
x231712
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