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Codeforces Round #717 (Div. 2)
38:51:12
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Difficulty:
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constructive algorithms
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
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x744
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x657
509D
Restoring Numbers
constructive algorithms
,
math
2200
x642
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x628
1157G
Inverse of Rows and Columns
brute force
,
constructive algorithms
2200
x589
1231E
Middle-Out
constructive algorithms
,
greedy
,
strings
2200
x467
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x397
42C
Safe cracking
brute force
,
constructive algorithms
2200
x361
134C
Swaps
constructive algorithms
,
graphs
,
greedy
2200
x357
86B
Tetris revisited
constructive algorithms
,
graph matchings
,
greedy
,
math
2200
x298
802H
Fake News (medium)
constructive algorithms
,
strings
2200
x292
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x287
125D
Two progressions
constructive algorithms
,
greedy
2200
x274
593C
Beautiful Function
constructive algorithms
,
math
2200
x225
774H
Repairing Of String
*special problem
,
constructive algorithms
2200
x204
952G
Puzzling Language
constructive algorithms
2200
x169
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x143
1450C2
Errich-Tac-Toe (Hard Version)
constructive algorithms
,
math
2300
x2391
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x1918
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x1844
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x1770
1494D
Dogeforces
constructive algorithms
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
sortings
,
trees
2300
x1693
1408F
Two Different
constructive algorithms
,
divide and conquer
2300
x1680
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x1676
1495C
Garden of the Sun
constructive algorithms
,
graphs
2300
x1645
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x1581
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x1577
888G
Xor-MST
bitmasks
,
constructive algorithms
,
data structures
2300
x1502
1148E
Earth Wind and Fire
constructive algorithms
,
greedy
,
math
,
sortings
,
two pointers
2300
x1324
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1284
1285E
Delete a Segment
brute force
,
constructive algorithms
,
data structures
,
dp
,
graphs
,
sortings
,
trees
,
two pointers
2300
x1191
584E
Anton and Ira
constructive algorithms
,
greedy
,
math
2300
x1171
1004D
Sonya and Matrix
brute force
,
constructive algorithms
,
implementation
2300
x1075
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1062
1244F
Chips
constructive algorithms
,
implementation
2300
x1041
610D
Vika and Segments
constructive algorithms
,
data structures
,
geometry
,
two pointers
2300
x981
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x948
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x940
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x910
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x883
573C
Bear and Drawing
constructive algorithms
,
dfs and similar
,
trees
2300
x839
858F
Wizard's Tour
constructive algorithms
,
dfs and similar
,
graphs
2300
x834
460D
Little Victor and Set
brute force
,
constructive algorithms
,
math
2300
x790
670F
Restore a Number
brute force
,
constructive algorithms
,
strings
2300
x759
1513E
Cost Equilibrium
combinatorics
,
constructive algorithms
,
math
,
sortings
2300
x740
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x702
277B
Set of Points
constructive algorithms
,
geometry
2300
x633
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x629
141E
Clearing Up
constructive algorithms
,
dp
,
dsu
,
graphs
2300
x555
97B
Superset
constructive algorithms
,
divide and conquer
2300
x553
432E
Square Tiling
constructive algorithms
,
greedy
2300
x525
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x501
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x464
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x449
42D
Strange town
constructive algorithms
,
math
2300
x297
213D
Stars
constructive algorithms
,
geometry
2300
x288
306D
Polygon
constructive algorithms
,
geometry
2300
x179
865D
Buy Low Sell High
constructive algorithms
,
data structures
,
greedy
2400
x1884
1358E
Are You Fired?
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1590
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1504
798D
Mike and distribution
constructive algorithms
,
sortings
2400
x1426
1329C
Drazil Likes Heap
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x1266
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1229
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1207
1494E
A-Z Graph
constructive algorithms
,
data structures
,
graphs
,
hashing
2400
x1068
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1047
1333E
Road to 1600
brute force
,
constructive algorithms
2400
x1036
1374F
Cyclic Shifts Sorting
brute force
,
constructive algorithms
,
implementation
,
sortings
2400
x998
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x985
1450F
The Struggling Contestant
constructive algorithms
,
greedy
2400
x959
1463E
Plan of Lectures
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
2400
x958
1343F
Restore the Permutation by Sorted Segments
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
2400
x950
1028E
Restore Array
constructive algorithms
2400
x920
911F
Tree Destruction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x871
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x858
621D
Rat Kwesh and Cheese
brute force
,
constructive algorithms
,
math
2400
x855
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x853
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x774
297C
Splitting the Uniqueness
constructive algorithms
2400
x768
1282E
The Cake Is a Lie
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
2400
x734
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x714
329C
Graph Reconstruction
constructive algorithms
2400
x698
1152E
Neko and Flashback
constructive algorithms
,
dfs and similar
,
graphs
2400
x689
1107G
Vasya and Maximum Profit
binary search
,
constructive algorithms
,
data structures
,
dp
,
dsu
2400
x673
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x666
1098C
Construct a tree
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2400
x632
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x624
1182D
Complete Mirror
constructive algorithms
,
dfs and similar
,
dp
,
hashing
,
implementation
,
trees
2400
x592
625D
Finals in arithmetic
constructive algorithms
,
implementation
,
math
2400
x543
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x534
1423J
Bubble Cup hypothesis
bitmasks
,
constructive algorithms
,
dp
,
math
2400
x497
633E
Startup Funding
binary search
,
constructive algorithms
,
data structures
,
probabilities
,
two pointers
2400
x496
209C
Trails and Glades
constructive algorithms
,
dsu
,
graphs
,
greedy
2400
x483
922F
Divisibility
constructive algorithms
,
dp
,
greedy
,
number theory
2400
x467
883J
Renovation
constructive algorithms
,
greedy
,
sortings
2400
x423
1163E
Magical Permutation
bitmasks
,
brute force
,
constructive algorithms
,
data structures
,
graphs
,
math
2400
x413
1089M
Minegraphed
constructive algorithms
,
graphs
2400
x412
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x398
1054E
Chips Puzzle
constructive algorithms
,
implementation
,
math
2400
x395
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x379
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