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Before contest
Pinely Round 4 (Div. 1 + Div. 2)
10:05:03
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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
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7529
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13224
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11742
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18810
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11275
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16848
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14738
1513C
Add One
dp
,
matrices
1600
x13597
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x14274
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x8006
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x6065
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x10255
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11267
1509C
The Sports Festival
dp
,
greedy
1800
x12172
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3907
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x6107
1506E
Restoring the Permutation
constructive algorithms
,
implementation
1500
x12837
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x21299
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1741
1505D
Xenolith? Hippodrome?
*special problem
,
number theory
1800
x756
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6341
1505B
DMCA
*special problem
,
implementation
,
number theory
1600
x6062
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6924
1503A
Balance the Bits
constructive algorithms
,
greedy
1600
x13221
1500A
Going Home
brute force
,
hashing
,
implementation
,
math
1800
x8667
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x12468
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9472
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16617
1497E1
Square-Free Division (easy version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
1700
x8162
1497C2
k-LCM (hard version)
constructive algorithms
,
math
1600
x16852
1495B
Let's Go Hiking
games
,
greedy
1900
x5901
1494C
1D Sokoban
binary search
,
dp
,
greedy
,
implementation
,
two pointers
1900
x5361
1494B
Berland Crossword
bitmasks
,
brute force
,
greedy
,
implementation
1400
x14146
1493B
Planet Lapituletti
brute force
,
implementation
1300
x11734
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x6003
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15821
1491D
Zookeeper and The Infinite Zoo
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
math
1800
x7035
1491C
Pekora and Trampoline
brute force
,
data structures
,
dp
,
greedy
,
implementation
1700
x7794
1490G
Old Floppy Drive
binary search
,
data structures
,
math
1900
x5586
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x15830
1490E
Accidental Victory
binary search
,
data structures
,
greedy
1400
x18717
1488D
Problemsolving Marathon
*special problem
,
binary search
,
greedy
1900
x336
1488C
Two Policemen
*special problem
,
binary search
,
brute force
,
math
1900
x404
1488B
RBS Deletion
*special problem
,
greedy
1800
x556
1487D
Pythagorean Triples
binary search
,
brute force
,
math
,
number theory
1500
x17439
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13917
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8288
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x11877
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x15655
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x9728
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3771
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9256
1482B
Restore Modulo
implementation
,
math
1500
x9122
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11462
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6847
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x11319
1478C
Nezzar and Symmetric Array
implementation
,
math
,
sortings
1700
x9622
1477B
Nezzar and Binary String
data structures
,
greedy
1900
x3130
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x5802
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8483
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11200
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x19747
1475G
Strange Beauty
dp
,
math
,
number theory
,
sortings
1900
x6642
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5206
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x13326
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x9950
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x20634
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12444
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9476
1473C
No More Inversions
constructive algorithms
,
math
1500
x12561
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x7903
1470B
Strange Definition
bitmasks
,
graphs
,
hashing
,
math
,
number theory
1900
x6250
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x21880
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9334
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10641
1468K
The Robot
brute force
,
implementation
1600
x5052
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x4039
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3685
1468D
Firecrackers
binary search
,
sortings
1700
x4582
1468C
Berpizza
data structures
,
implementation
1400
x7643
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6323
1467B
Hills And Valleys
brute force
,
implementation
1700
x10840
1466E
Apollo versus Pan
bitmasks
,
brute force
,
math
1800
x7201
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x11099
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17502
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4351
1463C
Busy Robot
implementation
1800
x5587
1463B
Find The Array
bitmasks
,
constructive algorithms
,
greedy
1400
x19107
1462F
The Treasure of The Segments
binary search
,
data structures
,
greedy
1800
x6858
1462E2
Close Tuples (hard version)
binary search
,
combinatorics
,
implementation
,
math
,
sortings
,
two pointers
1700
x9520
1462E1
Close Tuples (easy version)
binary search
,
combinatorics
,
math
,
sortings
,
two pointers
1500
x13534
1462D
Add to Neighbour and Remove
greedy
,
math
,
number theory
1400
x16554
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x9154
1461C
Random Events
dp
,
math
,
probabilities
1500
x11071
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12528
1459B
Move and Turn
dp
,
math
1300
x14396
1458A
Row GCD
math
,
number theory
1600
x17066
1455D
Sequence and Swaps
dp
,
greedy
,
sortings
1600
x12167
1454D
Number into Sequence
constructive algorithms
,
math
,
number theory
1300
x20089
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4117
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