Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 167 (Rated for Div. 2)
33:04:51
Register now »
→ 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
1329A
Dreamoon Likes Coloring
constructive algorithms
,
greedy
,
implementation
,
math
1800
x8995
1328F
Make k Equal
greedy
2200
x3141
1328E
Tree Queries
dfs and similar
,
graphs
,
trees
1900
x9126
1328D
Carousel
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
1800
x12828
1328C
Ternary XOR
greedy
,
implementation
1200
x29791
1328B
K-th Beautiful String
binary search
,
brute force
,
combinatorics
,
implementation
,
math
1300
x28507
1328A
Divisibility Problem
math
800
x95943
1327G
Letters and Question Marks
bitmasks
,
dp
,
string suffix structures
2800
x408
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1615
1327E
Count The Blocks
combinatorics
,
dp
,
math
1800
x8797
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3233
1327C
Game with Chips
constructive algorithms
,
implementation
1600
x13287
1327B
Princesses and Princes
brute force
,
graphs
,
greedy
1200
x18517
1327A
Sum of Odd Integers
math
1100
x37620
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x72
1326F2
Wise Men (Hard Version)
bitmasks
,
dp
,
math
3200
x474
1326F1
Wise Men (Easy Version)
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2600
x826
1326E
Bombs
data structures
,
two pointers
2400
x2152
1326D2
Prefix-Suffix Palindrome (Hard version)
binary search
,
greedy
,
hashing
,
string suffix structures
,
strings
1800
x9872
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x11886
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15491
1326B
Maximums
implementation
,
math
900
x23789
1326A
Bad Ugly Numbers
constructive algorithms
,
number theory
1000
x29847
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1892
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x2003
1325D
Ehab the Xorcist
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1700
x11824
1325C
Ehab and Path-etic MEXs
constructive algorithms
,
dfs and similar
,
greedy
,
trees
1500
x13233
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x35298
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x38838
1324F
Maximum White Subtree
dfs and similar
,
dp
,
graphs
,
trees
1800
x9443
1324E
Sleeping Schedule
dp
,
implementation
1700
x12970
1324D
Pair of Topics
binary search
,
data structures
,
sortings
,
two pointers
1400
x27330
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x27289
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x27828
1324A
Yet Another Tetris Problem
implementation
,
number theory
900
x25644
1323B
Count Subrectangles
binary search
,
greedy
,
implementation
1500
x8776
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19587
1322F
Assigning Fares
dp
,
trees
3500
x91
1322E
Median Mountain Range
data structures
3300
x297
1322D
Reality Show
bitmasks
,
dp
2800
x700
1322C
Instant Noodles
graphs
,
hashing
,
math
,
number theory
2300
x2358
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x4117
1322A
Unusual Competitions
greedy
1300
x12383
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9671
1321A
Contest for Robots
greedy
900
x14204
1320F
Blocks and Sensors
brute force
3500
x153
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x800
1320D
Reachable Strings
data structures
,
hashing
,
strings
2500
x1402
1320C
World of Darkraft: Battle for Azathoth
brute force
,
data structures
,
sortings
2000
x3057
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5957
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15846
1316F
Battalion Strength
data structures
,
divide and conquer
,
probabilities
2800
x779
1316E
Team Building
bitmasks
,
dp
,
greedy
,
sortings
2300
x3720
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3352
1316C
Primitive Primes
constructive algorithms
,
math
,
ternary search
1800
x7194
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x11175
1316A
Grade Allocation
implementation
800
x18572
1315C
Restoring Permutation
greedy
1200
x9976
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x9122
1315A
Dead Pixel
implementation
800
x11974
1313E
Concatenation with intersection
data structures
,
hashing
,
strings
,
two pointers
2700
x524
1313D
Happy New Year
bitmasks
,
dp
,
implementation
2500
x1309
1313C2
Skyscrapers (hard version)
data structures
,
dp
,
greedy
1900
x6345
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10280
1313B
Different Rules
constructive algorithms
,
greedy
,
implementation
,
math
1700
x6617
1313A
Fast Food Restaurant
brute force
,
greedy
,
implementation
900
x15385
1312G
Autocompletion
data structures
,
dfs and similar
,
dp
2600
x950
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x865
1312E
Array Shrinking
dp
,
greedy
2100
x5722
1312D
Count the Arrays
combinatorics
,
math
1700
x9192
1312C
Adding Powers
bitmasks
,
greedy
,
implementation
,
math
,
number theory
,
ternary search
1400
x16157
1312B
Bogosort
constructive algorithms
,
sortings
1000
x25402
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25572
1311F
Moving Points
data structures
,
divide and conquer
,
implementation
,
sortings
1900
x4125
1311E
Construct the Binary Tree
brute force
,
constructive algorithms
,
trees
2200
x2299
1311D
Three Integers
brute force
,
math
2000
x8881
1311C
Perform the Combo
brute force
1300
x15808
1311B
WeirdSort
dfs and similar
,
sortings
1200
x18702
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x41167
1310F
Bad Cryptography
math
,
number theory
3400
x71
1310E
Strange Function
dp
2900
x272
1310D
Tourism
dp
,
graphs
,
probabilities
2300
x1491
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x485
1310B
Double Elimination
dp
,
implementation
2500
x492
1310A
Recommendations
data structures
,
greedy
,
sortings
1700
x5138
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x486
1307F
Cow and Vacation
dfs and similar
,
dsu
,
trees
3300
x572
1307E
Cow and Treats
binary search
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
2500
x1259
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x6215
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11715
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x13090
1307A
Cow and Haybales
greedy
,
implementation
800
x14884
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x113
1305G
Kuroni and Antihype
bitmasks
,
brute force
,
dp
,
dsu
,
graphs
3500
x958
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2540
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3055
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4902
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x14066
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11641
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x13946
←
1
2
...
36
37
38
39
40
...
96
97
→
User lists
Name