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Before contest
Codeforces Round 941 (Div. 1)
04:07:45
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
04:07:45
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dp
combine-tags-by-or
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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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Name
132D
Constants in the language of Shakespeare
constructive algorithms
,
dp
,
greedy
2100
x603
132C
Logo Turtle
dp
1800
x2268
128C
Games with Rectangle
combinatorics
,
dp
2000
x2687
126D
Fibonacci Sums
dp
,
math
2300
x805
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x17686
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x689
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x588
120F
Spiders
dp
,
greedy
,
trees
1400
x3503
119C
Education Reform
dp
2000
x853
118D
Caesar's Legions
dp
1700
x16626
115E
Linear Kingdom Races
data structures
,
dp
2400
x1357
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x374
111D
Petya and Coloring
combinatorics
,
dp
2300
x713
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1263
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3183
107D
Crime Management
dp
,
graphs
,
matrices
2400
x400
107C
Arrangement
bitmasks
,
dp
2400
x361
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3279
106C
Buns
dp
1700
x5681
101E
Candies and Stones
divide and conquer
,
dp
2500
x477
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x671
101B
Buses
binary search
,
data structures
,
dp
1700
x2486
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x442
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1382
95D
Horse Races
dp
,
math
2500
x413
95B
Lucky Numbers
dp
,
greedy
1800
x1174
93E
Lostborn
dp
,
math
,
number theory
2600
x433
93D
Flags
dp
,
math
,
matrices
2500
x333
89B
Widget Library
dp
,
expression parsing
,
graphs
,
implementation
2300
x510
87D
Beautiful Road
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2300
x845
87C
Interesting Game
dp
,
games
,
math
2000
x1302
86C
Genetic engineering
dp
,
string suffix structures
,
trees
2500
x680
83E
Two Subsequences
bitmasks
,
dp
2800
x452
83D
Numbers
dp
,
math
,
number theory
2400
x817
82D
Two out of Three
dp
2000
x1917
81E
Pairs
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
2700
x325
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x942
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1714
78C
Beaver Game
dp
,
games
,
number theory
2000
x1798
77D
Domino Carpet
dp
,
implementation
2300
x309
77C
Beavermuncher-0xFF
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2100
x977
76F
Tourist
binary search
,
data structures
,
dp
2300
x601
76D
Plus and xor
dp
,
greedy
,
math
1700
x1989
76C
Mutation
bitmasks
,
dp
,
math
2700
x267
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1715
74B
Train
dp
,
games
,
greedy
1500
x1487
73C
LionAge II
dp
1800
x2041
72G
Fibonacci army
*special problem
,
dp
1000
x1972
71E
Nuclear Fusion
bitmasks
,
dp
2200
x668
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6215
70E
Information Reform
dp
,
implementation
,
trees
2700
x476
69D
Dot
dp
,
games
1900
x928
68D
Half-decay tree
data structures
,
divide and conquer
,
dp
,
math
,
probabilities
2500
x446
67D
Optical Experiment
binary search
,
data structures
,
dp
1900
x1330
67C
Sequence of Balls
dp
2600
x626
67A
Partial Teacher
dp
,
graphs
,
greedy
,
implementation
1800
x2053
66E
Petya and Post
data structures
,
dp
2000
x682
63E
Sweets Game
bitmasks
,
dfs and similar
,
dp
,
games
,
implementation
2000
x713
62E
World Evil
dp
,
flows
2700
x216
58E
Expression
dp
2400
x346
57D
Journey
dp
,
math
2500
x329
56D
Changing a String
dp
2100
x1509
55D
Beautiful numbers
dp
,
number theory
2500
x3590
54D
Writing a Song
brute force
,
dp
,
strings
2100
x503
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1242
53E
Dead Ends
bitmasks
,
dp
2500
x898
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x545
50D
Bombing
binary search
,
dp
,
probabilities
2100
x596
49E
Common ancestor
dp
2300
x646
49D
Game
brute force
,
dp
,
implementation
1800
x1830
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x254
48E
Ivan the Fool VS Gorynych the Dragon
dp
,
games
,
graphs
2100
x560
46E
Comb
data structures
,
dp
1900
x916
45B
School
dp
,
dsu
2200
x266
44H
Phone Number
dp
1700
x1672
44E
Anfisa the Monkey
dp
1400
x4799
41D
Pawn
dp
1900
x2167
39E
What Has Dirichlet Got to Do with That?
dp
,
games
2000
x852
39C
Moon Craters
dp
,
sortings
2100
x568
38H
The Great Marathon
dp
2400
x263
38F
Smart Boy
dp
,
games
,
strings
2100
x374
38E
Let's Go Rolling!
dp
,
sortings
1800
x2480
37D
Lesson Timetable
combinatorics
,
dp
,
math
2300
x387
35D
Animals
dp
,
greedy
1700
x3139
31E
TV Game
dp
2400
x1017
30C
Shooting Gallery
dp
,
probabilities
1800
x1847
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
28C
Bath Queue
combinatorics
,
dp
,
probabilities
2200
x981
27E
Number With The Given Amount Of Divisors
brute force
,
dp
,
number theory
2000
x3980
24D
Broken robot
dp
,
math
,
probabilities
2400
x1787
23E
Tree
dp
2500
x587
22B
Bargaining Table
brute force
,
dp
1500
x4068
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2007
19B
Checkout Assistant
dp
1900
x4337
18E
Flag 2
dp
2000
x1016
18D
Seller Bob
brute force
,
dp
,
greedy
2000
x1028
17C
Balance
dp
2500
x812
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x4606
15E
Triangles
combinatorics
,
dp
2600
x556
14E
Camels
dp
1900
x1614
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