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Before contest
Codeforces Round 941 (Div. 1)
3 days
Register now »
*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
3 days
Register now »
*has extra registration
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2-sat
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bitmasks
brute force
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combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
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graph matchings
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greedy
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Name
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2626
380A
Sereja and Prefixes
binary search
,
brute force
1600
x2645
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2652
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2654
360B
Levko and Array
binary search
,
dp
2000
x2696
847E
Packmen
binary search
,
dp
1800
x2711
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2721
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2756
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2768
1552F
Telepanting
binary search
,
data structures
,
dp
,
sortings
2200
x2776
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2777
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2783
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2786
1250J
The Parade
binary search
,
greedy
1800
x2844
1044A
The Tower is Going Home
binary search
,
two pointers
1700
x2845
181B
Number of Triplets
binary search
,
brute force
1300
x2868
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2885
595B
Pasha and Phone
binary search
,
math
1600
x2893
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x2896
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2898
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2911
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2913
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2945
965D
Single-use Stones
binary search
,
flows
,
greedy
,
two pointers
1900
x2957
671B
Robin Hood
binary search
,
greedy
2000
x2966
496D
Tennis Game
binary search
1900
x2976
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x2981
939E
Maximize!
binary search
,
greedy
,
ternary search
,
two pointers
1800
x2994
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3029
689D
Friends and Subsequences
binary search
,
data structures
2100
x3053
803D
Magazine Ad
binary search
,
greedy
1900
x3055
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3072
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3086
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3093
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3108
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3114
700A
As Fast As Possible
binary search
,
math
1900
x3142
645C
Enduring Exodus
binary search
,
two pointers
1600
x3148
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3163
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3165
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3171
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3176
613A
Peter and Snow Blower
binary search
,
geometry
,
ternary search
1900
x3178
1801C
Music Festival
binary search
,
data structures
,
dp
,
greedy
,
sortings
1900
x3191
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3193
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3202
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3214
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3227
938C
Constructing Tests
binary search
,
brute force
,
constructive algorithms
1700
x3273
756B
Travel Card
binary search
,
dp
1600
x3297
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3307
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3318
896A
Nephren gives a riddle
binary search
,
dfs and similar
1700
x3335
1216E1
Numerical Sequence (easy version)
binary search
,
brute force
,
math
1900
x3343
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3343
925A
Stairs and Elevators
binary search
1600
x3353
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3382
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3415
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3431
1015E2
Stars Drawing (Hard Edition)
binary search
,
dp
,
greedy
1900
x3456
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3493
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3510
471C
MUH and House of Cards
binary search
,
brute force
,
greedy
,
math
1700
x3533
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3533
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3547
940D
Alena And The Heater
binary search
,
implementation
1600
x3560
799C
Fountains
binary search
,
data structures
,
implementation
1800
x3569
1582E
Pchelyonok and Segments
binary search
,
data structures
,
dp
,
greedy
,
math
2000
x3575
1260D
A Game with Traps
binary search
,
dp
,
greedy
,
sortings
1900
x3579
1902D
Robot Queries
binary search
,
data structures
,
dp
,
implementation
1900
x3616
1575J
Jeopardy of Dropped Balls
binary search
,
brute force
,
dsu
,
implementation
1500
x3633
1827B1
Range Sorting (Easy Version)
binary search
,
dp
,
dsu
,
greedy
,
trees
,
two pointers
2000
x3637
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3653
1551E
Fixed Points
binary search
,
brute force
,
dp
2000
x3667
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3673
1891D
Suspicious logarithms
binary search
,
brute force
,
math
1900
x3682
1788D
Moving Dots
binary search
,
brute force
,
combinatorics
,
math
,
two pointers
2000
x3700
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3702
363D
Renting Bikes
binary search
,
greedy
1800
x3739
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3780
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x3780
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3788
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3817
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3822
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3823
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3834
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3887
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x3899
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3939
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3950
483B
Friends and Presents
binary search
,
math
1800
x3985
1082E
Increasing Frequency
binary search
,
dp
,
greedy
2000
x3991
1650E
Rescheduling the Exam
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1900
x4000
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4015
772A
Voltage Keepsake
binary search
,
math
1800
x4067
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4074
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4080
514D
R2D2 and Droid Army
binary search
,
data structures
,
two pointers
2000
x4100
68B
Energy exchange
binary search
1600
x4111
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4126
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