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Codeforces Round 941 (Div. 1)
2 days
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Before contest
Codeforces Round 941 (Div. 2)
2 days
Register now »
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2-sat
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bitmasks
brute force
chinese remainder theorem
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constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
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fft
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geometry
graph matchings
graphs
greedy
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implementation
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Problems
#
Name
1912G
Great City Saint Petersburg
data structures
2400
x415
154D
Flatland Fencing
games
,
math
2400
x415
83C
Track
graphs
,
greedy
,
shortest paths
2400
x401
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x400
107D
Crime Management
dp
,
graphs
,
matrices
2400
x400
593E
Strange Calculation and Cats
dp
,
matrices
2400
x399
720B
Cactusophobia
dfs and similar
,
flows
2400
x391
204D
Little Elephant and Retro Strings
dp
2400
x391
273D
Dima and Figure
dp
2400
x385
332D
Theft of Blueprints
graphs
,
math
2400
x381
1912H
Hypercatapult Commute
graphs
2400
x369
198C
Delivering Carcinogen
binary search
,
geometry
2400
x368
952F
2 + 2 != 4
2400
x367
856D
Masha and Cactus
dp
,
trees
2400
x367
1045H
Self-exploration
math
2400
x365
51E
Pentagon
combinatorics
,
graphs
,
matrices
2400
x363
331C2
The Great Julya Calendar
dp
2400
x362
107C
Arrangement
bitmasks
,
dp
2400
x361
26E
Multithreading
constructive algorithms
2400
x361
74D
Hanger
data structures
2400
x359
58E
Expression
dp
2400
x346
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x341
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x332
73E
Morrowindows
math
,
number theory
2400
x321
32E
Hide-and-Seek
geometry
,
implementation
2400
x321
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x314
1218D
Xor Spanning Tree
divide and conquer
,
fft
,
graphs
2400
x312
335D
Rectangles and Square
brute force
,
dp
2400
x304
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x296
332E
Binary Key
dp
,
greedy
,
implementation
2400
x294
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x289
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x283
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x279
75E
Ship's Shortest Path
geometry
,
shortest paths
2400
x268
38H
The Great Marathon
dp
2400
x263
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x254
97A
Domino
brute force
,
implementation
2400
x250
1575M
Managing Telephone Poles
data structures
,
geometry
2400
x234
331D1
Escaping on Beaveractor
dfs and similar
,
implementation
2400
x194
177G1
Fibonacci Strings
strings
2400
x164
929D
Пограничные врата
2400
x149
39G
Inverse Function
implementation
2400
x123
409I
Feed the Golorp
*special problem
2400
x115
119E
Alternative Reality
geometry
2400
x93
64I
Sort the Table
*special problem
,
sortings
2400
x84
1910H
Sum of Digits of Sums
*special problem
,
binary search
,
data structures
2400
x77
661H
Rotate Matrix
*special problem
2400
x63
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x60
55D
Beautiful numbers
dp
,
number theory
2500
x3588
868F
Yet Another Minimization Problem
divide and conquer
,
dp
2500
x3400
508D
Tanya and Password
dfs and similar
,
graphs
2500
x3079
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x2764
840D
Destiny
data structures
,
probabilities
2500
x2756
911G
Mass Change Queries
data structures
2500
x2560
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2521
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2329
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2235
449C
Jzzhu and Apples
constructive algorithms
,
number theory
2500
x2193
986C
AND Graph
bitmasks
,
dfs and similar
,
dsu
,
graphs
2500
x2184
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2170
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2161
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2095
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2076
348C
Subset Sums
brute force
,
data structures
2500
x2076
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2044
1481E
Sorting Books
data structures
,
dp
,
greedy
2500
x1994
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x1935
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1934
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1845
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1801
963D
Frequency of String
hashing
,
string suffix structures
,
strings
2500
x1797
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1736
1548C
The Three Little Pigs
combinatorics
,
dp
,
fft
,
math
2500
x1733
1188C
Array Beauty
dp
2500
x1701
1637F
Towers
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2500
x1690
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1678
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1653
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1648
840C
On the Bench
combinatorics
,
dp
2500
x1636
997C
Sky Full of Stars
combinatorics
,
math
2500
x1629
442C
Artem and Array
data structures
,
greedy
2500
x1618
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1601
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1599
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1574
1497E2
Square-free division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1557
704B
Ant Man
dp
,
graphs
,
greedy
2500
x1557
348D
Turtles
dp
,
matrices
2500
x1557
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1540
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1503
594D
REQ
data structures
,
number theory
2500
x1503
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1482
1497D
Genius
bitmasks
,
dp
,
graphs
,
number theory
2500
x1480
156D
Clues
combinatorics
,
graphs
2500
x1463
1444C
Team-Building
data structures
,
dfs and similar
,
dsu
,
graphs
2500
x1454
1418G
Three Occurrences
data structures
,
divide and conquer
,
hashing
,
two pointers
2500
x1453
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1438
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1438
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1421
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1417
739C
Alyona and towers
data structures
2500
x1391
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