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Codeforces Round 937 (Div. 4)
05:50:04
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Difficulty:
—
greedy
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
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6550
771B
Bear and Different Names
constructive algorithms
,
greedy
1500
x6612
1167D
Bicolored RBS
constructive algorithms
,
greedy
1500
x6674
1158A
The Party and Sweets
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
,
two pointers
1500
x6682
1043C
Smallest Word
constructive algorithms
,
greedy
,
implementation
1500
x6759
991D
Bishwock
dp
,
greedy
1500
x6984
1178D
Prime Graph
constructive algorithms
,
greedy
,
math
,
number theory
1500
x7115
1209C
Paint the Digits
constructive algorithms
,
greedy
,
implementation
1500
x7194
960B
Minimize the error
data structures
,
greedy
,
sortings
1500
x7212
587A
Duff and Weight Lifting
greedy
1500
x7335
863B
Kayaking
brute force
,
greedy
,
sortings
1500
x7452
468A
24 Game
constructive algorithms
,
greedy
,
math
1500
x7725
845C
Two TVs
data structures
,
greedy
,
sortings
1500
x7728
1102D
Balanced Ternary String
greedy
,
strings
1500
x7780
1066B
Heaters
greedy
,
two pointers
1500
x8008
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8132
1141D
Colored Boots
greedy
,
implementation
1500
x8219
1062B
Math
greedy
,
math
,
number theory
1500
x8358
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8382
1186D
Vus the Cossack and Numbers
constructive algorithms
,
greedy
,
math
1500
x8682
1114B
Yet Another Array Partitioning Task
constructive algorithms
,
greedy
,
sortings
1500
x8829
437B
The Child and Set
bitmasks
,
greedy
,
implementation
,
sortings
1500
x9078
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9091
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9271
1180B
Nick and Array
greedy
,
implementation
1500
x9378
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9432
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9460
1207C
Gas Pipeline
dp
,
greedy
1500
x9464
1883D
In Love
data structures
,
greedy
1500
x9550
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9558
1154D
Walking Robot
greedy
1500
x9582
1753A2
Make Nonzero Sum (hard version)
constructive algorithms
,
dp
,
greedy
1500
x9643
1005D
Polycarp and Div 3
dp
,
greedy
,
number theory
1500
x9730
1264A
Beautiful Regional Contest
greedy
,
implementation
1500
x9769
274A
k-Multiple Free Set
binary search
,
greedy
,
sortings
1500
x9795
1675E
Replace With the Previous, Minimize
dsu
,
greedy
,
strings
1500
x9941
1814C
Search in Parallel
constructive algorithms
,
greedy
,
sortings
1500
x9970
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x9971
1722G
Even-Odd XOR
bitmasks
,
constructive algorithms
,
greedy
1500
x10066
1898B
Milena and Admirer
greedy
,
math
1500
x10082
1817A
Almost Increasing Subsequence
binary search
,
data structures
,
greedy
1500
x10130
1579C
Ticks
greedy
,
implementation
1500
x10195
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10340
1858B
The Walkway
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10420
1710A
Color the Picture
constructive algorithms
,
greedy
,
math
1500
x10515
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x10559
982C
Cut 'em all!
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
1500
x10625
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x10675
1215C
Swap Letters
constructive algorithms
,
greedy
1500
x10748
1891C
Smilo and Monsters
binary search
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x10789
1882C
Card Game
brute force
,
greedy
1500
x10976
1760F
Quests
binary search
,
greedy
,
sortings
1500
x11027
1515D
Phoenix and Socks
greedy
,
sortings
,
two pointers
1500
x11085
1873G
ABBC or BACB
constructive algorithms
,
greedy
1500
x11284
1804C
Pull Your Luck
brute force
,
greedy
,
math
,
number theory
1500
x11330
1774B
Coloring
constructive algorithms
,
greedy
,
math
1500
x11382
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x11527
1256D
Binary String Minimizing
greedy
1500
x11645
1809C
Sum on Subarrays
constructive algorithms
,
greedy
,
math
1500
x11691
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x11810
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11811
1249C2
Good Numbers (hard version)
binary search
,
greedy
,
math
,
meet-in-the-middle
1500
x12132
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x12269
282B
Painting Eggs
greedy
,
math
1500
x12464
1278B
A and B
greedy
,
math
1500
x12759
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x12760
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x12770
1792C
Min Max Sort
binary search
,
brute force
,
greedy
,
math
,
two pointers
1500
x12943
1621B
Integers Shop
data structures
,
greedy
,
implementation
1500
x12982
1366C
Palindromic Paths
greedy
,
math
1500
x13101
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13119
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13198
1203E
Boxers
greedy
,
sortings
1500
x13314
1487C
Minimum Ties
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
1500
x13597
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x13703
1296D
Fight with Monsters
greedy
,
sortings
1500
x13722
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13732
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x13751
1690E
Price Maximization
binary search
,
greedy
,
math
,
two pointers
1500
x14290
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14518
1419C
Killjoy
greedy
,
implementation
,
math
1500
x14797
1552B
Running for Gold
combinatorics
,
graphs
,
greedy
,
sortings
1500
x14865
1490F
Equalize the Array
binary search
,
data structures
,
greedy
,
math
,
sortings
1500
x15252
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15337
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15425
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x15428
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15448
1400C
Binary String Reconstruction
2-sat
,
brute force
,
constructive algorithms
,
greedy
1500
x16633
1201B
Zero Array
greedy
,
math
1500
x17409
1399D
Binary String To Subsequences
constructive algorithms
,
data structures
,
greedy
,
implementation
1500
x17511
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x17759
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x17802
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18214
1409D
Decrease the Sum of Digits
greedy
,
math
1500
x18499
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x18864
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x20872
1338A
Powered Addition
greedy
,
math
1500
x22375
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x23513
545C
Woodcutters
dp
,
greedy
1500
x25972
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x35872
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