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Before contest
Codeforces Round 941 (Div. 1)
06:25:29
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Before contest
Codeforces Round 941 (Div. 2)
06:25:29
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trees
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2-sat
binary search
bitmasks
brute force
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combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
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interactive
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number theory
probabilities
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shortest paths
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strings
ternary search
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Problems
#
Name
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x302
1109F
Sasha and Algorithm of Silence's Sounds
data structures
,
trees
3200
x278
1007D
Ants
2-sat
,
data structures
,
trees
3200
x256
1819E
Roads in E City
interactive
,
math
,
probabilities
,
trees
3200
x241
1781G
Diverse Coloring
constructive algorithms
,
trees
3200
x213
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x179
482E
ELCA
data structures
,
trees
3200
x175
500G
New Year Running
number theory
,
trees
3200
x155
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x122
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x103
923F
Public Service
constructive algorithms
,
graphs
,
trees
3200
x72
690F3
Tree of Life (hard)
trees
3200
x45
526G
Spiders Evil Plan
greedy
,
trees
3300
x689
1307F
Cow and Vacation
dfs and similar
,
dsu
,
trees
3300
x565
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x313
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x286
1495F
Squares
constructive algorithms
,
data structures
,
dp
,
graphs
,
trees
3300
x280
704E
Iron Man
data structures
,
geometry
,
trees
3300
x272
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x259
1876E
Ball-Stackable
constructive algorithms
,
data structures
,
dp
,
trees
3300
x216
1740H
MEX Tree Manipulation
data structures
,
trees
3300
x201
855G
Harry Vs Voldemort
dfs and similar
,
dp
,
graphs
,
trees
3300
x199
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x118
1491H
Yuezheng Ling and Dynamic Tree
data structures
,
trees
3400
x759
1119F
Niyaz and Small Degrees
data structures
,
dp
,
trees
3400
x647
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x478
1137F
Matches Are Not a Child's Play
data structures
,
trees
3400
x456
1482H
Exam
data structures
,
string suffix structures
,
trees
3400
x422
1710D
Recover the Tree
constructive algorithms
,
trees
3400
x405
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x357
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x231
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x226
1010F
Tree
fft
,
graphs
,
trees
3400
x209
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x182
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x147
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x136
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x121
1023G
Pisces
data structures
,
flows
,
trees
3400
x112
1464F
My Beautiful Madness
data structures
,
trees
3500
x273
1458F
Range Diameter Sum
data structures
,
trees
3500
x258
1450G
Communism
bitmasks
,
dp
,
trees
3500
x231
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x214
1336F
Journey
data structures
,
divide and conquer
,
graphs
,
trees
3500
x194
1053E
Euler tour
constructive algorithms
,
trees
3500
x193
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x167
1621H
Trains and Airplanes
dfs and similar
,
graphs
,
shortest paths
,
trees
3500
x161
1608G
Alphabetic Tree
binary search
,
data structures
,
dfs and similar
,
hashing
,
string suffix structures
,
strings
,
trees
3500
x147
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x143
1208H
Red Blue Tree
data structures
,
implementation
,
trees
3500
x141
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x132
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x130
1423C
Dušan's Railway
divide and conquer
,
graphs
,
trees
3500
x130
1824E
LuoTianyi and Cartridge
data structures
,
trees
3500
x124
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x116
1761G
Centroid Guess
interactive
,
probabilities
,
trees
3500
x95
1322F
Assigning Fares
dp
,
trees
3500
x88
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x84
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x77
1863H
Goldberg Machine 3
dp
,
trees
3500
x71
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x70
1863I
Redundant Routes
constructive algorithms
,
dp
,
trees
3500
x69
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x68
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x54
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