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Codeforces Round 950 (Div. 3)
14:50:23
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sortings
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
1608E
The Cells on the Paper
binary search
,
implementation
,
sortings
2800
x425
1607H
Banquet Preparations 2
greedy
,
sortings
,
two pointers
2200
x1201
1607D
Blue-Red Permutation
greedy
,
math
,
sortings
1300
x16463
1607C
Minimum Extraction
brute force
,
sortings
1000
x24418
1606D
Red-Blue Matrix
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x1403
1605E
Array Equalizer
binary search
,
greedy
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2400
x1001
1605B
Reverse Sort
greedy
,
sortings
1000
x17704
1601D
Difficult Mountain
data structures
,
dp
,
greedy
,
sortings
2700
x1394
1601C
Optimal Insertion
data structures
,
divide and conquer
,
dp
,
greedy
,
sortings
2300
x1929
1592B
Hemose Shopping
constructive algorithms
,
dsu
,
math
,
sortings
1200
x15643
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x21694
1584C
Two Arrays
greedy
,
math
,
sortings
900
x16051
1583H
Omkar and Tours
data structures
,
divide and conquer
,
sortings
,
trees
3300
x317
1579B
Shifting Sort
implementation
,
sortings
1100
x17861
1575L
Longest Array Deconstruction
data structures
,
divide and conquer
,
dp
,
sortings
2100
x1288
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4236
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x16621
1573B
Swaps
greedy
,
math
,
sortings
1400
x14218
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8586
1569D
Inconvenient Pairs
binary search
,
data structures
,
implementation
,
sortings
,
two pointers
1900
x4308
1566F
Points Movement
data structures
,
dp
,
greedy
,
implementation
,
sortings
2600
x931
1566D2
Seating Arrangements (hard version)
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x7711
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13812
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x13663
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16466
1560E
Polycarp and String Transformation
binary search
,
implementation
,
sortings
,
strings
1800
x7709
1558F
Strange Sort
data structures
,
sortings
3300
x357
1557B
Moamen and k-subarrays
greedy
,
sortings
1100
x22919
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27533
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3879
1552G
A Serious Referee
bitmasks
,
brute force
,
dfs and similar
,
sortings
3000
x455
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2804
1552E
Colors and Intervals
constructive algorithms
,
data structures
,
greedy
,
sortings
2300
x1781
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5788
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x15042
1552A
Subsequence Permutation
sortings
,
strings
800
x23562
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x12951
1550D
Excellent Arrays
binary search
,
combinatorics
,
constructive algorithms
,
implementation
,
math
,
sortings
,
two pointers
2300
x1791
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13942
1545A
AquaMoon and Strange Sort
sortings
1500
x13633
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13724
1539F
Strange Array
data structures
,
greedy
,
sortings
2600
x839
1539D
PriceFixed
binary search
,
greedy
,
implementation
,
sortings
,
two pointers
1600
x11333
1539C
Stable Groups
greedy
,
sortings
1200
x21443
1535B
Array Reodering
brute force
,
greedy
,
math
,
number theory
,
sortings
900
x29752
1534H
Lost Nodes
constructive algorithms
,
dp
,
graphs
,
interactive
,
sortings
,
trees
3500
x144
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x531
1532D
Teams Forming
*special problem
,
sortings
x582
1530C
Pursuit
binary search
,
brute force
,
greedy
,
sortings
1200
x14288
1529B
Sifid and Strange Subsequences
greedy
,
math
,
sortings
1100
x20372
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x23906
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4343
1519E
Off by One
constructive algorithms
,
dfs and similar
,
geometry
,
graphs
,
sortings
,
trees
2700
x810
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16116
1517B
Morning Jogging
constructive algorithms
,
greedy
,
sortings
1200
x13070
1515I
Phoenix and Diamonds
binary search
,
data structures
,
sortings
3400
x230
1515H
Phoenix and Bits
bitmasks
,
brute force
,
data structures
,
sortings
3500
x218
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11182
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x591
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4112
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1206
1513E
Cost Equilibrium
combinatorics
,
constructive algorithms
,
math
,
sortings
2300
x1418
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x5089
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x329
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x532
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3115
1503D
Flip the Cards
2-sat
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
2600
x970
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3212
1501B
Napoleon Cake
dp
,
implementation
,
sortings
900
x18551
1500D
Tiles for Bathroom
data structures
,
sortings
,
two pointers
2900
x418
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1845
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23943
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x16759
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x2506
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4771
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x15566
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4392
1487A
Arena
implementation
,
sortings
800
x26239
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x15362
1485F
Copy or Prefix Sum
combinatorics
,
data structures
,
dp
,
sortings
2400
x1873
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x16956
1478C
Nezzar and Symmetric Array
implementation
,
math
,
sortings
1700
x9519
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2214
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x535
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2256
1475G
Strange Beauty
dp
,
math
,
number theory
,
sortings
1900
x6471
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x12996
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x9792
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12255
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32946
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x2950
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x7752
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x26218
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21431
1468D
Firecrackers
binary search
,
sortings
1700
x4483
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2802
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x10876
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x1463
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9262
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13264
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