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Codeforces Round 974 (Div. 3)
01:55:59
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*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
1256F
Equalizing Two Strings
constructive algorithms
,
sortings
,
strings
2000
x3295
1256E
Yet Another Division Into Teams
dp
,
greedy
,
sortings
2000
x4111
1256C
Platforms Jumping
greedy
1700
x6876
1255C
League of Leesins
constructive algorithms
,
implementation
1600
x6699
1254E
Send Tree to Charlie
combinatorics
,
dfs and similar
,
dsu
,
trees
3300
x265
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x1220
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1416
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3162
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4644
1254A
Feeding Chicken
constructive algorithms
,
greedy
,
implementation
1700
x5173
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1771
1253E
Antenna Coverage
data structures
,
dp
,
greedy
,
sortings
2200
x2829
1253D
Harmonious Graph
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
1700
x9203
1252L
Road Construction
flows
,
graphs
2300
x580
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1851
1252J
Tiling Terrace
brute force
,
dp
2300
x719
1252I
Mission Possible
3000
x31
1252H
Twin Buildings
greedy
,
implementation
1800
x2627
1252G
Performance Review
data structures
2100
x1422
1252F
Regular Forestation
hashing
,
trees
2400
x922
1252E
Songwriter
greedy
,
two pointers
2200
x1238
1252D
Find String in a Grid
data structures
,
dp
,
strings
,
trees
3000
x342
1252C
Even Path
data structures
,
implementation
1600
x3718
1252B
Cleaning Robots
dp
,
trees
2300
x516
1251F
Red-White Fence
combinatorics
,
fft
2500
x819
1251E2
Voting (Hard Version)
binary search
,
data structures
,
greedy
2400
x2633
1251E1
Voting (Easy Version)
data structures
,
dp
,
greedy
2300
x2328
1251D
Salary Changing
binary search
,
greedy
,
sortings
1900
x5927
1251C
Minimize The Integer
greedy
,
two pointers
1600
x12371
1250N
Wires
dfs and similar
,
graphs
,
greedy
2000
x1584
1250M
SmartGarden
constructive algorithms
,
divide and conquer
2500
x360
1250K
Projectors
flows
,
graphs
3100
x202
1250J
The Parade
binary search
,
greedy
1800
x2931
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x132
1250G
Discarding Game
dp
,
greedy
,
two pointers
2300
x721
1250E
The Coronation
graphs
,
implementation
2300
x813
1250D
Conference Problem
dp
3000
x176
1250C
Trip to Saint Petersburg
data structures
2100
x1311
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2605
1249F
Maximum Weight Subset
dp
,
trees
2200
x2342
1249E
By Elevator or Stairs?
dp
,
shortest paths
1700
x9652
1249D2
Too Many Segments (hard version)
data structures
,
greedy
,
sortings
1800
x5228
1249D1
Too Many Segments (easy version)
greedy
1800
x5094
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2380
1246F
Cursor Distance
3500
x164
1245F
Daniel and Spring Cleaning
bitmasks
,
brute force
,
combinatorics
,
dp
2300
x1996
1245E
Hyakugoku and Ladders
dp
,
probabilities
,
shortest paths
2300
x1268
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x7521
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x1349
1244F
Chips
constructive algorithms
,
implementation
2300
x1526
1244E
Minimizing Difference
binary search
,
constructive algorithms
,
greedy
,
sortings
,
ternary search
,
two pointers
2000
x5088
1244D
Paint the Tree
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
trees
1800
x7548
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7586
1243B2
Character Swap (Hard Version)
strings
1600
x7081
1242E
Planar Perimeter
constructive algorithms
,
graphs
3200
x130
1242D
Number Discovery
math
3400
x199
1242C
Sum Balance
bitmasks
,
dfs and similar
,
dp
,
graphs
2400
x1665
1242B
0-1 MST
dfs and similar
,
dsu
,
graphs
,
sortings
1900
x7495
1240F
Football
graphs
3100
x247
1239F
Swiper, no swiping!
graphs
,
implementation
3400
x266
1239E
Turtle
dp
,
implementation
3100
x934
1239D
Catowice City
2-sat
,
dfs and similar
,
graph matchings
,
graphs
2400
x2011
1239C
Queue in the Train
data structures
,
greedy
,
implementation
2300
x1340
1239B
The World Is Just a Programming Task (Hard Version)
implementation
2500
x1044
1239A
Ivan the Fool and the Probability Theory
combinatorics
,
dp
,
math
1700
x7340
1238G
Adilbek and the Watering System
data structures
,
greedy
,
sortings
2700
x409
1238F
The Maximum Subtree
dfs and similar
,
dp
,
graphs
,
trees
2200
x1874
1238E
Keyboard Purchase
bitmasks
,
dp
2200
x2955
1238D
AB-string
binary search
,
combinatorics
,
dp
,
strings
1900
x5971
1238C
Standard Free2play
dp
,
greedy
,
math
1600
x7409
1237H
Balanced Reversals
constructive algorithms
3300
x371
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x123
1237F
Balanced Domino Placements
combinatorics
,
dp
2600
x879
1237E
Balanced Binary Search Trees
dp
,
math
2400
x1321
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x4186
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4331
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x6078
1236F
Alice and the Cactus
dfs and similar
,
graphs
,
math
,
probabilities
3000
x177
1236E
Alice and the Unfair Game
binary search
,
data structures
,
dp
,
dsu
2500
x655
1236D
Alice and the Doll
brute force
,
data structures
,
greedy
,
implementation
2300
x1667
1234F
Yet Another Substring Reverse
bitmasks
,
dp
2200
x2583
1234E
Special Permutations
math
2000
x2777
1234D
Distinct Characters Queries
data structures
1600
x14931
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x834
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x437
1228E
Another Filling the Grid
combinatorics
,
dp
,
math
2300
x2716
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x5201
1228C
Primes and Multiplication
math
,
number theory
1700
x9016
1227G
Not Same
constructive algorithms
2600
x1020
1227F2
Wrong Answer on test 233 (Hard Version)
combinatorics
,
math
2400
x1497
1227F1
Wrong Answer on test 233 (Easy Version)
dp
2200
x1799
1227E
Arson In Berland Forest
binary search
,
graphs
,
graphs
,
shortest paths
2200
x1483
1227D2
Optimal Subsequences (Hard Version)
data structures
,
greedy
1800
x4319
1227D1
Optimal Subsequences (Easy Version)
data structures
,
greedy
1600
x6392
1227C
Messy
constructive algorithms
1700
x5514
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x544
1225F
Tree Factory
constructive algorithms
,
greedy
,
trees
2500
x884
1225E
Rock Is Push
binary search
,
dp
2200
x1887
1225D
Power Products
hashing
,
math
,
number theory
1800
x7954
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8947
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