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Codeforces Round 974 (Div. 3)
19:04:26
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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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Custom test
Problems
#
Name
1302H
Who needs suffix structures?
x8
1302G
Keep talking and nobody explodes -- medium
x23
1302F
Keep talking and nobody explodes -- easy
bitmasks
,
brute force
,
expression parsing
x74
1302E
Amazing bitset
x46
1302D
Dijkstra
x96
1302C
Segment tree or Fenwick?
data structures
x382
1302B
DAG
constructive algorithms
x145
1302A
Nash equilibrium
x297
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1277
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1522
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x4000
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9335
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x14199
1301A
Three Strings
implementation
,
strings
800
x19355
1300B
Assigning to Classes
greedy
,
implementation
,
sortings
1000
x23361
1300A
Non-zero
implementation
,
math
800
x20969
1299E
So Mean
interactive
,
math
3400
x163
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x439
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3922
1299B
Aerodynamic
geometry
1800
x5238
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x12016
1297I
Falling Blocks
*special problem
,
data structures
x31
1297H
Paint the String
*special problem
,
dp
,
strings
x44
1297G
M-numbers
*special problem
,
dp
,
math
x70
1297F
Movie Fan
*special problem
,
data structures
,
greedy
,
implementation
,
sortings
x117
1297E
Modernization of Treeland
*special problem
,
dfs and similar
,
trees
x205
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x262
1297C
Dream Team
*special problem
,
greedy
x399
1297B
Cartoons
*special problem
,
implementation
,
sortings
x413
1297A
Likes Display
*special problem
,
implementation
x941
1296F
Berland Beauty
constructive algorithms
,
dfs and similar
,
greedy
,
sortings
,
trees
2100
x2888
1296E2
String Coloring (hard version)
data structures
,
dp
2000
x5024
1296E1
String Coloring (easy version)
constructive algorithms
,
dp
,
graphs
,
greedy
,
sortings
1800
x7465
1296D
Fight with Monsters
greedy
,
sortings
1500
x14243
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14799
1296B
Food Buying
math
900
x30131
1296A
Array with Odd Sum
math
800
x41556
1295F
Good Contest
combinatorics
,
dp
,
probabilities
2700
x1214
1295E
Permutation Separation
data structures
,
divide and conquer
2200
x2529
1295D
Same GCDs
math
,
number theory
1800
x8865
1295C
Obtain The String
dp
,
greedy
,
strings
1600
x12904
1295B
Infinite Prefixes
math
,
strings
1700
x9304
1295A
Display The Number
greedy
900
x22784
1294F
Three Paths on a Tree
dfs and similar
,
dp
,
greedy
,
trees
2000
x5774
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4914
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11710
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x34555
1294B
Collecting Packages
implementation
,
sortings
1200
x21766
1294A
Collecting Coins
math
800
x46624
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21181
1293A
ConneR and the A.R.C. Markland-N
binary search
,
brute force
,
implementation
1100
x15388
1292F
Nora's Toy Boxes
bitmasks
,
combinatorics
,
dp
3500
x310
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x332
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x810
1292C
Xenon's Attack on the Gangs
combinatorics
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x2059
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6337
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x13320
1291F
Coffee Varieties (easy version)
graphs
,
interactive
2800
x657
1291B
Array Sharpening
greedy
,
implementation
1300
x14160
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19539
1290F
Making Shapes
dp
3500
x379
1290E
Cartesian Tree
data structures
3300
x543
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x823
1290C
Prefix Enlightenment
dfs and similar
,
dsu
,
graphs
2400
x1732
1290B
Irreducible Anagrams
binary search
,
constructive algorithms
,
data structures
,
strings
,
two pointers
1800
x5409
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8562
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x512
1288E
Messenger Simulator
data structures
2000
x3567
1288D
Minimax Problem
binary search
,
bitmasks
,
dp
2000
x7152
1288C
Two Arrays
combinatorics
,
dp
1600
x12848
1288B
Yet Another Meme Problem
math
1100
x17038
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18246
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9430
1287A
Angry Students
greedy
,
implementation
800
x20566
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x244
1286E
Fedya the Potter Strikes Back
data structures
,
strings
3200
x514
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x582
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x636
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1424
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4689
1286A
Garland
dp
,
greedy
,
sortings
1800
x8788
1285F
Classical?
binary search
,
combinatorics
,
number theory
2900
x1131
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1828
1285D
Dr. Evil Underscores
bitmasks
,
brute force
,
dfs and similar
,
divide and conquer
,
dp
,
greedy
,
strings
,
trees
1900
x7701
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x23335
1285B
Just Eat It!
dp
,
greedy
,
implementation
1300
x22537
1285A
Mezo Playing Zoma
math
800
x28040
1284G
Seollal
graphs
3300
x173
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x317
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1299
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x3156
1284C
New Year and Permutation
combinatorics
,
math
1600
x8001
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10815
1284A
New Year and Naming
implementation
,
strings
800
x17989
1283F
DIY Garland
constructive algorithms
,
greedy
,
trees
2200
x1847
1283E
New Year Parties
dp
,
greedy
1800
x6536
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7772
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x13113
1283B
Candies Division
math
900
x21622
1283A
Minutes Before the New Year
math
800
x49518
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