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#
Name
1521E
Nastia and a Beautiful Matrix
binary search
,
constructive algorithms
,
dp
,
greedy
2700
x649
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1809
1521C
Nastia and a Hidden Permutation
constructive algorithms
,
interactive
2000
x4283
1521B
Nastia and a Good Array
constructive algorithms
,
math
,
number theory
1300
x20799
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35464
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3513
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2902
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x10981
1520E
Arranging The Sheep
greedy
,
math
1400
x20062
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42930
1520C
Not Adjacent Matrix
constructive algorithms
1000
x30722
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x43028
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x49843
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x388
1519E
Off by One
constructive algorithms
,
dfs and similar
,
geometry
,
graphs
,
sortings
,
trees
2700
x807
1519D
Maximum Sum of Products
brute force
,
dp
,
implementation
,
math
,
two pointers
1600
x14619
1519C
Berland Regional
brute force
,
data structures
,
greedy
,
number theory
,
sortings
1400
x16027
1519B
The Cake Is a Lie
dp
,
math
800
x29988
1519A
Red and Blue Beans
math
800
x28331
1517H
Fly Around the World
dp
,
geometry
3500
x64
1517G
Starry Night Camping
constructive algorithms
,
flows
,
graphs
3300
x413
1517F
Reunion
combinatorics
,
dp
,
trees
3200
x443
1517E
Group Photo
binary search
,
data structures
,
implementation
,
two pointers
2500
x945
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7349
1517C
Fillomino 2
constructive algorithms
,
dfs and similar
,
greedy
,
implementation
1400
x13076
1517B
Morning Jogging
constructive algorithms
,
greedy
,
sortings
1200
x13056
1517A
Sum of 2050
greedy
,
math
800
x25126
1516E
Baby Ehab Plays with Permutations
combinatorics
,
dp
,
math
2500
x812
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4103
1516C
Baby Ehab Partitions Again
bitmasks
,
constructive algorithms
,
dp
,
math
1700
x11547
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18153
1516A
Tit for Tat
greedy
800
x23153
1515I
Phoenix and Diamonds
binary search
,
data structures
,
sortings
3400
x225
1515H
Phoenix and Bits
bitmasks
,
brute force
,
data structures
,
sortings
3500
x215
1515G
Phoenix and Odometers
dfs and similar
,
graphs
,
math
,
number theory
2700
x937
1515F
Phoenix and Earthquake
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2600
x1687
1515E
Phoenix and Computers
combinatorics
,
dp
,
math
2200
x3377
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11166
1515C
Phoenix and Towers
constructive algorithms
,
data structures
,
greedy
1400
x16549
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24199
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20019
1514E
Baby Ehab's Hyper Apartment
binary search
,
graphs
,
interactive
,
sortings
,
two pointers
2700
x587
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4100
1514C
Product 1 Modulo N
greedy
,
number theory
1600
x14358
1514B
AND 0, Sum Big
bitmasks
,
combinatorics
,
math
1200
x22922
1514A
Perfectly Imperfect Array
math
,
number theory
800
x23816
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1201
1513E
Cost Equilibrium
combinatorics
,
constructive algorithms
,
math
,
sortings
2300
x1414
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x5060
1513C
Add One
dp
,
matrices
1600
x13267
1513B
AND Sequences
bitmasks
,
combinatorics
,
constructive algorithms
,
math
1400
x13815
1513A
Array and Peaks
constructive algorithms
,
implementation
800
x19190
1512G
Short Task
brute force
,
dp
,
math
,
number theory
1700
x7826
1512F
Education
brute force
,
dp
,
greedy
,
implementation
1900
x5948
1512E
Permutation by Sum
brute force
,
greedy
,
math
1600
x10040
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21764
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x19505
1512B
Almost Rectangle
implementation
800
x25037
1512A
Spy Detected!
brute force
,
implementation
800
x60198
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x701
1511F
Chainword
brute force
,
data structures
,
dp
,
matrices
,
string suffix structures
,
strings
2700
x418
1511E
Colorings and Dominoes
combinatorics
,
dp
,
greedy
,
math
2100
x2464
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11075
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22258
1511B
GCD Length
constructive algorithms
,
math
,
number theory
1100
x22003
1511A
Review Site
greedy
800
x27178
1510K
King's Task
brute force
,
graphs
,
implementation
1200
x5281
1510J
Japanese Game
constructive algorithms
,
math
2700
x506
1510I
Is It Rated?
greedy
,
interactive
,
math
,
probabilities
2700
x449
1510H
Hard Optimization
dp
3200
x97
1510G
Guide
2100
x1259
1510F
Fiber Shape
2800
x57
1510E
Equilibrium Point /\textbackslash/\textbackslash
2700
x241
1510D
Digits
dp
,
math
,
number theory
2100
x1802
1510C
Cactus Not Enough
dfs and similar
,
graph matchings
,
graphs
2900
x205
1510B
Button Lock
flows
,
graph matchings
,
graphs
2600
x716
1510A
ASCII Automata Art
3100
x149
1509C
The Sports Festival
dp
,
greedy
1800
x11847
1509B
TMT Document
greedy
1100
x21148
1509A
Average Height
constructive algorithms
800
x25729
1508F
Optimal Encoding
brute force
,
data structures
3500
x117
1508E
Tree Calendar
brute force
,
constructive algorithms
,
data structures
,
dfs and similar
,
sortings
,
trees
3100
x327
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x530
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1425
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3846
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x6022
1506G
Maximize the Remaining String
brute force
,
data structures
,
dp
,
greedy
,
strings
2000
x4102
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3106
1506E
Restoring the Permutation
constructive algorithms
,
implementation
1500
x12623
1506D
Epic Transformation
constructive algorithms
,
data structures
,
greedy
1400
x20794
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x23485
1506B
Partial Replacement
greedy
,
implementation
1100
x19919
1506A
Strange Table
math
800
x30135
1505I
Mysterious language again, seriously?
*special problem
2200
x538
1505H
L BREAK into program
*special problem
2500
x484
1505G
Encoded message
*special problem
,
implementation
2600
x292
1505F
Math
*special problem
,
math
2200
x1472
1505E
Cakewalk
*special problem
,
greedy
,
implementation
,
shortest paths
1800
x1724
1505D
Xenolith? Hippodrome?
*special problem
,
number theory
1800
x740
1505C
Fibonacci Words
*special problem
,
implementation
1400
x6305
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graph matchings
graphs
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