Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 950 (Div. 3)
34:46:29
Register now »
→ Filter Problems
Difficulty:
—
number theory
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22337
474F
Ant colony
data structures
,
math
,
number theory
2100
x7851
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x57410
463E
Caisa and Tree
brute force
,
dfs and similar
,
math
,
number theory
,
trees
2100
x1430
460B
Little Dima and Equation
brute force
,
implementation
,
math
,
number theory
1500
x12121
456B
Fedya and Maths
math
,
number theory
1200
x16083
451E
Devu and Flowers
bitmasks
,
combinatorics
,
number theory
2300
x3346
449E
Jzzhu and Squares
dp
,
math
,
number theory
2900
x284
449C
Jzzhu and Apples
constructive algorithms
,
number theory
2500
x2203
448E
Divisors
brute force
,
dfs and similar
,
implementation
,
number theory
2200
x1450
446C
DZY Loves Fibonacci Numbers
data structures
,
math
,
number theory
2400
x3191
439C
Devu and Partitioning of the Array
brute force
,
constructive algorithms
,
implementation
,
number theory
1700
x3802
438E
The Child and Binary Tree
combinatorics
,
divide and conquer
,
fft
,
number theory
3100
x1803
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x21060
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9658
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2522
401D
Roman and Numbers
bitmasks
,
brute force
,
combinatorics
,
dp
,
number theory
2000
x3989
396B
On Sum of Fractions
math
,
number theory
x1045
396A
On Number of Decompositions into Multipliers
combinatorics
,
math
,
number theory
x1462
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9433
375A
Divisible by Seven
math
,
number theory
1600
x4673
371B
Fox Dividing Cheese
math
,
number theory
1300
x10954
364C
Beautiful Set
brute force
,
number theory
2300
x587
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7902
360D
Levko and Sets
number theory
2600
x394
359C
Prime Number
math
,
number theory
1900
x2946
354C
Vasya and Beautiful Arrays
brute force
,
dp
,
number theory
2100
x2991
353C
Find Maximum
implementation
,
math
,
number theory
1600
x4753
348B
Apple Tree
dfs and similar
,
number theory
,
trees
2100
x2048
346E
Doodle Jump
math
,
number theory
3000
x256
346A
Alice and Bob
games
,
math
,
number theory
1600
x8480
343A
Rational Resistance
math
,
number theory
1600
x8549
338D
GCD Table
chinese remainder theorem
,
math
,
number theory
2900
x1097
337E
Divisor Tree
brute force
,
number theory
,
trees
2200
x1007
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4787
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9119
336D
Vasily the Bear and Beautiful Strings
combinatorics
,
math
,
number theory
2100
x935
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2378
313A
Ilya and Bank Account
implementation
,
number theory
900
x53959
306C
White, Black and White Again
combinatorics
,
number theory
2100
x460
303D
Rotatable Number
math
,
number theory
2600
x280
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x857
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1028
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7785
294D
Shaass and Painter Robot
brute force
,
implementation
,
number theory
2500
x308
294C
Shaass and Lights
combinatorics
,
number theory
1900
x3726
293C
Cube Problem
brute force
,
math
,
number theory
2400
x555
284A
Cows and Primitive Roots
implementation
,
math
,
number theory
1400
x6400
283D
Cows and Cool Sequences
dp
,
math
,
number theory
2400
x524
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1412
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x480
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12495
267A
Subtractions
math
,
number theory
900
x7185
264B
Good Sequences
dp
,
number theory
1500
x9730
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1013
248B
Chilly Willy
math
,
number theory
1400
x5209
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5594
236B
Easy Number Challenge
implementation
,
number theory
1300
x13552
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x758
235A
LCM Challenge
number theory
1600
x16935
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x70706
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x847
225E
Unsolvable
math
,
number theory
2100
x784
225B
Well-known Numbers
binary search
,
greedy
,
number theory
1600
x3108
223C
Partial Sums
combinatorics
,
math
,
number theory
1900
x1514
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2100
216E
Martian Luck
math
,
number theory
2000
x546
215E
Periodical Numbers
combinatorics
,
dp
,
number theory
2100
x539
200E
Tractor College
implementation
,
math
,
number theory
,
ternary search
2400
x334
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25291
185D
Visit of the Great
math
,
number theory
2600
x386
180B
Divisibility Rules
math
,
number theory
2300
x328
177B2
Rectangular Game
number theory
1200
x2837
177B1
Rectangular Game
number theory
1000
x3997
172D
Calendar Reform
*special problem
,
number theory
1500
x1383
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2692
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1253
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6185
154B
Colliders
math
,
number theory
1600
x4308
150A
Win or Freeze
games
,
math
,
number theory
1400
x7607
134B
Pairs of Numbers
brute force
,
dfs and similar
,
math
,
number theory
1900
x1927
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3523
122A
Lucky Division
brute force
,
number theory
1000
x117163
121C
Lucky Permutation
brute force
,
combinatorics
,
number theory
1900
x1271
117B
Very Interesting Game
brute force
,
number theory
1800
x1539
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1204
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3557
93E
Lostborn
dp
,
math
,
number theory
2600
x435
84A
Toy Army
math
,
number theory
900
x14629
83D
Numbers
dp
,
math
,
number theory
2400
x825
78C
Beaver Game
dp
,
games
,
number theory
2000
x1809
75C
Modified GCD
binary search
,
number theory
1600
x12079
74C
Chessboard Billiard
dfs and similar
,
dsu
,
graphs
,
number theory
2100
x951
73E
Morrowindows
math
,
number theory
2400
x324
71C
Round Table Knights
dp
,
math
,
number theory
1600
x6260
68A
Irrational problem
implementation
,
number theory
1100
x4833
66D
Petya and His Friends
constructive algorithms
,
math
,
number theory
1700
x3063
64E
Prime Segment
*special problem
,
brute force
,
math
,
number theory
1800
x235
59B
Fortune Telling
implementation
,
number theory
1200
x6716
55D
Beautiful numbers
dp
,
number theory
2500
x3622
←
1
2
...
5
6
7
8
→
User lists
Name