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Codeforces Round #716 (Div. 2)
06:09:38
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Difficulty:
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brute force
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
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x372
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x2976
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x2625
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x4537
1512A
Spy Detected!
brute force
,
implementation
800
x20547
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x234
1511F
Chainword
brute force
,
data structures
,
dp
,
matrices
,
string suffix structures
,
strings
2700
x126
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x5736
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x12060
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x2560
1508F
Optimal Encoding
brute force
,
data structures
x13
1508E
Tree Calendar
brute force
,
constructive algorithms
,
dfs and similar
,
sortings
x86
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
x532
1506G
Maximize the Remaining String
brute force
,
data structures
,
dp
,
greedy
,
strings
2000
x2430
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x13695
1500C
Matrix Sorting
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
two pointers
2600
x404
1500B
Two chandeliers
binary search
,
brute force
,
chinese remainder theorem
,
math
,
number theory
2200
x1315
1500A
Going Home
brute force
,
hashing
,
implementation
,
math
1800
x5732
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x7661
1499B
Binary Removals
brute force
,
dp
,
greedy
,
implementation
1000
x12886
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1246
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x5585
1498A
GCD Sum
brute force
,
math
800
x14989
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x16457
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x13499
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x117
1494F
Delete The Edges
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2900
x207
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x9278
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x14437
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x2888
1493C
K-beautiful Strings
binary search
,
brute force
,
constructive algorithms
,
greedy
,
strings
2000
x3098
1493B
Planet Lapituletti
brute force
,
implementation
1300
x8694
1492E
Almost Fault-Tolerant Database
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
2500
x876
1491I
Ruler Of The Zoo
brute force
,
data structures
3500
x29
1491E
Fib-tree
brute force
,
dfs and similar
,
divide and conquer
,
number theory
,
trees
2400
x1363
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x5270
1491B
Minimal Cost
brute force
,
math
1200
x10153
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x14295
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x16091
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x16393
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x262
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x2949
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x9558
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x8135
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1836
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x5900
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x13281
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x6018
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x3203
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x7490
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x14403
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x387
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x13723
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x19754
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x12643
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x3427
1475B
New Year's Number
brute force
,
dp
,
math
900
x24042
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x7889
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x18038
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x2107
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x13989
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x938
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1356
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x6384
1468K
The Robot
brute force
,
implementation
1600
x3125
1467B
Hills And Valleys
brute force
,
implementation
1700
x7756
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x5034
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x18829
1462C
Unique Number
brute force
,
greedy
,
math
900
x18477
1461E
Water Level
brute force
,
graphs
,
greedy
,
implementation
,
math
2200
x1641
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x5961
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x8792
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1047
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x3155
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1112
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x11297
1444E
Finding the Vertex
brute force
,
dfs and similar
,
dp
,
interactive
,
trees
3500
x59
1444A
Division
brute force
,
math
,
number theory
1500
x8233
1443E
Long Permutation
brute force
,
math
,
two pointers
2400
x902
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x818
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x15345
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x2714
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x49
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x15260
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x12509
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x5211
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x458
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x3317
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x9796
1419B
Stairs
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1200
x12308
1415D
XOR-gun
bitmasks
,
brute force
,
constructive algorithms
2000
x3373
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x7318
1415B
Repainting Street
brute force
,
brute force
,
greedy
1100
x9239
1415A
Prison Break
brute force
,
math
800
x12255
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x4034
1411D
Grime Zoo
brute force
,
greedy
,
implementation
,
strings
2100
x1865
1411B
Fair Numbers
brute force
,
number theory
1000
x11892
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x16323
1409B
Minimum Product
brute force
,
greedy
,
math
1100
x19809
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x3149
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