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→ Pay attention
Before contest
Codeforces Round #792 (Div. 1)
3 days
Before contest
Codeforces Round #792 (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
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
Submit
Status
Standings
Custom test
Problems
#
Name
158A
Next Round
*special problem
,
implementation
800
x149627
770A
New Password
*special problem
,
implementation
800
x13091
411A
Password Check
*special problem
,
implementation
800
x5362
291A
Spyke Talks
*special problem
,
implementation
,
sortings
800
x5337
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x4788
769A
Year of University Entrance
*special problem
,
implementation
,
sortings
800
x4695
1431A
Selling Hamburgers
*special problem
800
x1257
1571A
Sequence of Comparisons
*special problem
800
x864
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x11382
1057A
Bmail Computer Network
*special problem
,
dfs and similar
,
trees
900
x4380
130A
Hexagonal numbers
*special problem
,
implementation
900
x1067
1488A
From Zero To Y
*special problem
,
math
900
x1010
637A
Voting for Photos
*special problem
,
constructive algorithms
,
implementation
1000
x4605
644A
Parliament of Berland
*special problem
,
constructive algorithms
1000
x4015
1346A
Color Revolution
*special problem
,
math
1000
x1638
72G
Fibonacci army
*special problem
,
dp
1000
x1215
1211A
Three Problems
*special problem
,
implementation
1000
x876
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x61034
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x7426
638A
Home Numbers
*special problem
,
constructive algorithms
,
math
1100
x3329
159B
Matchmaker
*special problem
,
greedy
,
sortings
1100
x3257
1001A
Generate plus state or minus state
*special problem
1100
x955
100A
Carpeting the Room
*special problem
,
implementation
1100
x654
162A
Pentagonal numbers
*special problem
,
implementation
1100
x625
188A
Hexagonal Numbers
*special problem
1100
x515
188D
Asterisks
*special problem
,
implementation
1100
x379
1115G1
AND oracle
*special problem
1100
x362
522A
Reposts
*special problem
,
dfs and similar
,
dp
,
graphs
,
trees
1200
x12453
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x9444
171A
Mysterious numbers - 1
*special problem
,
constructive algorithms
1200
x3384
774C
Maximum Number
*special problem
,
constructive algorithms
,
greedy
,
implementation
1200
x3055
928A
Login Verification
*special problem
,
strings
1200
x3054
769B
News About Credit
*special problem
,
greedy
,
two pointers
1200
x2993
523A
Rotate, Flip and Zoom
*special problem
,
implementation
1200
x2410
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2305
683A
The Check of the Point
*special problem
,
geometry
1200
x721
1001H
Oracle for f(x) = parity of the number of 1s in x
*special problem
1200
x502
72C
Extraordinarily Nice Numbers
*special problem
,
math
1200
x482
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x5883
171B
Star
*special problem
,
combinatorics
1300
x3115
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x2858
770B
Maximize Sum of Digits
*special problem
,
implementation
,
math
1300
x2396
171D
Broken checker
*special problem
,
brute force
1300
x2072
929B
Места в самолёте
*special problem
,
implementation
1300
x2010
64A
Factorial
*special problem
,
implementation
1300
x1046
661A
Lazy Caterer Sequence
*special problem
1300
x558
1001F
Distinguish multi-qubit basis states
*special problem
1300
x509
1571B
Epic Novel
*special problem
,
math
1300
x489
188B
A + Reverse B
*special problem
,
implementation
1300
x404
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x7031
1505C
Fibonacci Words
*special problem
,
implementation
1400
x5357
290A
Mysterious strings
*special problem
,
implementation
1400
x2660
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2584
929A
Прокат велосипедов
*special problem
,
greedy
,
implementation
1400
x2436
523C
Name Quest
*special problem
,
greedy
1400
x2328
637C
Promocodes with Mistakes
*special problem
,
brute force
,
constructive algorithms
,
implementation
1400
x2326
928B
Chat
*special problem
,
dp
1400
x2302
159A
Friends or Not
*special problem
,
greedy
,
implementation
1400
x2241
290D
Orange
*special problem
,
implementation
1400
x1629
1057B
DDoS
*special problem
,
brute force
1400
x1586
770D
Draw Brackets!
*special problem
,
implementation
1400
x1511
1346B
Boot Camp
*special problem
,
greedy
1400
x959
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x792
1001B
Generate Bell state
*special problem
1400
x681
1001D
Distinguish plus state and minus state
*special problem
1400
x655
1001C
Generate GHZ state
*special problem
1400
x625
1001G
Oracle for f(x) = k-th element of x
*special problem
1400
x511
470A
Crystal Ball Sequence
*special problem
,
implementation
1400
x497
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x436
100C
A+B
*special problem
,
implementation
1400
x414
188C
LCM
*special problem
,
implementation
,
math
1400
x344
683D
Chocolate Bar
*special problem
,
math
1400
x284
188E
HQ9+
*special problem
,
implementation
1400
x273
188F
Binary Notation
*special problem
,
implementation
1400
x244
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x6539
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x3896
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2221
290B
QR code
*special problem
,
implementation
1500
x2130
774D
Lie or Truth
*special problem
,
constructive algorithms
,
implementation
,
sortings
1500
x1736
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1681
172D
Calendar Reform
*special problem
,
number theory
1500
x1237
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1048
523B
Mean Requests
*special problem
,
implementation
1500
x911
1211B
Traveling Around the Golden Ring of Berland
*special problem
,
implementation
1500
x656
530A
Quadratic equation
*special problem
1500
x646
64B
Expression
*special problem
,
expression parsing
1500
x576
530C
Diophantine equation
*special problem
1500
x444
130C
Decimal sum
*special problem
1500
x420
345A
Expecting Trouble
*special problem
,
probabilities
1500
x418
1431D
Used Markers
*special problem
,
greedy
1500
x386
130D
Exponentiation
*special problem
1500
x327
72I
Goofy Numbers
*special problem
,
implementation
1500
x299
100D
World of Mouth
*special problem
,
strings
1500
x265
100B
Friendly Numbers
*special problem
,
implementation
1500
x244
1115U1
Anti-diagonal unitary
*special problem
1500
x240
100I
Rotation
*special problem
,
geometry
,
math
1500
x215
1505B
DMCA
*special problem
,
implementation
,
number theory
1600
x4991
523D
Statistics of Recompressing Videos
*special problem
,
data structures
,
implementation
1600
x1874
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x1770
291C
Network Mask
*special problem
,
bitmasks
,
brute force
,
implementation
1600
x1613
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