Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 986 (Div. 2)
06:35:24
Register now »
*has extra registration
→ 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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
623A
Graph and String
constructive algorithms
,
graphs
1800
x4506
612D
The Union of k-Segments
greedy
,
sortings
1800
x3888
610C
Harmony Analysis
constructive algorithms
1800
x2853
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2584
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x6265
592C
The Big Race
math
1800
x3068
585A
Gennady the Dentist
brute force
,
implementation
1800
x4340
584D
Dima and Lisa
brute force
,
math
,
number theory
1800
x9449
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9881
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1692
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3861
543A
Writing Code
dp
1800
x8003
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2430
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2266
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4801
519D
A and B and Interesting Substrings
data structures
,
dp
,
two pointers
1800
x6396
513G1
Inversions problem
brute force
,
dfs and similar
,
dp
,
meet-in-the-middle
1800
x1793
513B2
Permutations
bitmasks
,
divide and conquer
,
math
1800
x2638
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3158
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3769
483B
Friends and Presents
binary search
,
math
1800
x4088
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6560
478C
Table Decorations
greedy
1800
x18340
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x8227
470B
Hexakosioihexekontahexaphobia
*special problem
1800
x260
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x10220
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x2001
448D
Multiplication Table
binary search
,
brute force
1800
x14197
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x5271
440C
One-Based Arithmetic
brute force
,
dfs and similar
,
divide and conquer
1800
x915
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2678
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2487
432C
Prime Swaps
greedy
,
sortings
1800
x2522
420B
Online Meeting
implementation
1800
x1045
409E
Dome
*special problem
1800
x578
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5231
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2621
371D
Vessels
data structures
,
dsu
,
implementation
,
trees
1800
x5691
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1579
363D
Renting Bikes
binary search
,
greedy
1800
x3958
358D
Dima and Hares
dp
,
greedy
1800
x4083
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2926
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2463
333B
Chips
greedy
1800
x2652
328A
IQ Test
implementation
1800
x2083
325B
Stadium and Games
binary search
,
math
1800
x1568
301A
Yaroslav and Sequence
constructive algorithms
1800
x3086
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9615
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4727
274B
Zero Tree
dfs and similar
,
dp
,
greedy
,
trees
1800
x5034
271D
Good Substrings
data structures
,
strings
1800
x11454
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3634
257C
View Angle
brute force
,
geometry
,
math
1800
x4356
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x2005
254C
Anagram
greedy
,
strings
1800
x1497
252B
Unsorting Array
brute force
,
sortings
1800
x1717
251B
Playing with Permutations
implementation
,
math
1800
x1276
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x6753
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8731
238B
Boring Partition
constructive algorithms
1800
x1333
234F
Fence
dp
1800
x1747
222C
Reducing Fractions
implementation
,
math
,
number theory
,
sortings
1800
x2252
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x10364
216C
Hiring Staff
greedy
1800
x1850
207D9
The Beaver's Problem - 3
1800
x88
207D1
The Beaver's Problem - 3
1800
x117
207A2
Beaver's Calculator 1.0
greedy
1800
x242
201B
Guess That Car!
math
,
ternary search
1800
x1267
200D
Programming Language
binary search
,
brute force
,
expression parsing
,
implementation
1800
x916
200C
Football Championship
brute force
,
implementation
1800
x1060
195C
Try and Catch
expression parsing
,
implementation
1800
x1143
190B
Surrounded
geometry
1800
x2855
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x266
187B
AlgoRace
dp
,
shortest paths
1800
x1984
185B
Mushroom Scientists
math
,
ternary search
1800
x1641
182E
Wooden Fence
dp
1800
x1463
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1783
180A
Defragmentation
implementation
1800
x541
178F1
Representative Sampling
1800
x404
178B3
Greedy Merchants
1800
x1215
177F1
Script Generation
1800
x303
174C
Range Increments
data structures
,
greedy
1800
x1100
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x3158
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2168
162J
Brackets
*special problem
1800
x96
162H
Alternating case
*special problem
1800
x220
162F
Factorial zeros
*special problem
1800
x202
162E
HQ9+
*special problem
1800
x178
162C
Prime factorization
*special problem
1800
x805
162B
Binary notation
*special problem
1800
x313
161D
Distance in Tree
dfs and similar
,
dp
,
trees
1800
x15083
153B
Binary notation
*special problem
1800
x157
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x7315
145B
Lucky Number 2
constructive algorithms
1800
x2217
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2218
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2469
140D
New Year Contest
greedy
,
sortings
1800
x2214
140C
New Year Snowmen
binary search
,
data structures
,
greedy
1800
x4382
140B
New Year Cards
brute force
,
greedy
,
implementation
1800
x1683
132C
Logo Turtle
dp
1800
x2352
←
1
2
3
4
5
→
User lists
Name