Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 166 (Rated for Div. 2)
27:06:06
Register now »
→ Filter Problems
Difficulty:
—
binary search
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
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3822
1453E
Dog Snacks
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
2300
x1978
1452B
Toy Blocks
binary search
,
greedy
,
math
,
sortings
1400
x14460
1450D
Rating Compression
binary search
,
data structures
,
greedy
,
implementation
,
two pointers
1800
x5325
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x274
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3407
1443C
The Delivery Dilemma
binary search
,
greedy
,
sortings
1400
x14987
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x558
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1684
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1294
1437E
Make It Increasing
binary search
,
constructive algorithms
,
data structures
,
dp
,
implementation
2200
x3337
1436E
Complicated Computations
binary search
,
data structures
,
two pointers
2400
x2124
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5873
1436C
Binary Search
binary search
,
combinatorics
1500
x10560
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x155
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8680
1428H
Rotary Laser Lock
binary search
,
interactive
3500
x89
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2170
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3527
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x69
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x19059
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4693
1423B
Valuable Paper
binary search
,
flows
,
graph matchings
,
graphs
1900
x1776
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x477
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14857
1419D1
Sage's Birthday (easy version)
binary search
,
constructive algorithms
,
greedy
,
sortings
1000
x23702
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1730
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x279
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11831
1413C
Perform Easily
binary search
,
brute force
,
dp
,
implementation
,
sortings
,
two pointers
1900
x5554
1409E
Two Platforms
binary search
,
dp
,
sortings
,
two pointers
1800
x7594
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x353
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4174
1408C
Discrete Acceleration
binary search
,
dp
,
implementation
,
math
,
two pointers
1500
x8658
1404C
Fixed Point Removal
binary search
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2300
x2508
1403A
The Potion of Great Power
*special problem
,
2-sat
,
binary search
,
data structures
,
graphs
,
interactive
,
sortings
,
two pointers
2400
x286
1401F
Reverse and Swap
binary search
,
bitmasks
,
data structures
2400
x1537
1399E2
Weights Division (hard version)
binary search
,
dfs and similar
,
greedy
,
sortings
,
trees
,
two pointers
2200
x2224
1398F
Controversial Rounds
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2500
x1071
1398E
Two Types of Spells
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
2200
x2182
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x904
1392F
Omkar and Landslide
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
2400
x1946
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x673
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x253
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x572
1379D
New Passenger Trams
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
2300
x1061
1379C
Choosing flowers
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
two pointers
2000
x5434
1379B
Dubious Cyrpto
binary search
,
brute force
,
math
,
number theory
1500
x12495
1373F
Network Coverage
binary search
,
constructive algorithms
,
data structures
,
greedy
2400
x1625
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x427
1371E2
Asterism (Hard Version)
binary search
,
combinatorics
,
dp
,
math
,
number theory
,
sortings
2300
x2302
1371E1
Asterism (Easy Version)
binary search
,
brute force
,
combinatorics
,
math
,
number theory
,
sortings
1900
x4963
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1250
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1370
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4621
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9166
1367F2
Flying Sort (Hard Version)
binary search
,
data structures
,
dp
,
greedy
,
sortings
,
two pointers
2400
x1453
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x593
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3975
1366A
Shovels and Swords
binary search
,
greedy
,
math
1100
x29068
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3838
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1390
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4296
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x351
1359C
Mixing Water
binary search
,
math
1700
x13316
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x438
1358D
The Best Vacation
binary search
,
brute force
,
greedy
,
implementation
,
two pointers
1900
x8041
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4740
1355C
Count Triangles
binary search
,
implementation
,
math
,
two pointers
1800
x10237
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x722
1354D
Multiset
binary search
,
data structures
1900
x8308
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5820
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15344
1354B
Ternary String
binary search
,
dp
,
implementation
,
two pointers
1200
x29483
1352C
K-th Not Divisible by n
binary search
,
math
1200
x50564
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8558
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25584
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x985
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5893
1336B
Xenia and Colorful Gems
binary search
,
greedy
,
math
,
sortings
,
two pointers
1700
x11076
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10510
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33456
1334F
Strange Function
binary search
,
data structures
,
dp
,
greedy
2500
x1134
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12202
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x172
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28233
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x9646
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x26920
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26997
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8562
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3965
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8972
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x473
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1121
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6042
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x110
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1276
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9072
1301B
Motarack's Birthday
binary search
,
greedy
,
ternary search
1500
x13884
1297D
Bonus Distribution
*special problem
,
binary search
,
greedy
,
sortings
x260
←
1
2
3
4
5
6
7
...
10
11
→
User lists
Name