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Good Bye 2024: 2025 is NEAR
4 days
→ Filter Problems
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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
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Status
Standings
Custom test
Problems
#
Name
436B
Om Nom and Spiders
implementation
,
math
1400
x3061
436A
Feed with Candy
greedy
1500
x3521
435E
Special Graph
2500
x244
435D
Special Grid
brute force
,
dp
,
greedy
2000
x761
435C
Cardiogram
implementation
1600
x2585
435B
Pasha Maximizes
greedy
1400
x7074
435A
Queue on Bus Stop
implementation
1000
x10244
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x296
434D
Nanami's Power Plant
flows
2900
x474
433E
Tachibana Kanade's Tofu
dp
2500
x484
433D
Nanami's Digital Board
dsu
,
implementation
2000
x1248
433C
Ryouko's Memory Note
implementation
,
math
,
sortings
1800
x2500
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x41184
433A
Kitahara Haruki's Gift
brute force
,
implementation
1100
x16549
432E
Square Tiling
constructive algorithms
,
greedy
2300
x702
432D
Prefixes and Suffixes
dp
,
string suffix structures
,
strings
,
two pointers
2000
x9362
432C
Prime Swaps
greedy
,
sortings
1800
x2538
432B
Football Kit
brute force
,
greedy
,
implementation
1200
x11762
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x61287
431E
Chemistry Experiment
binary search
,
data structures
,
ternary search
2200
x1040
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2353
431C
k-Tree
dp
,
implementation
,
trees
1600
x26093
431B
Shower Line
brute force
,
implementation
1200
x10916
431A
Black Square
implementation
800
x56219
430B
Balls Game
brute force
,
two pointers
1400
x3742
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2288
429E
Points and Segments
graphs
3000
x904
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2200
x2961
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x960
429B
Working out
dp
1600
x8899
429A
Xor-tree
dfs and similar
,
trees
1300
x10490
427E
Police Patrol
greedy
,
implementation
,
math
,
ternary search
2000
x1440
427D
Match & Catch
dp
,
string suffix structures
,
strings
2200
x2226
427C
Checkposts
dfs and similar
,
graphs
,
two pointers
1700
x14320
427B
Prison Transfer
data structures
,
implementation
1100
x14173
427A
Police Recruits
implementation
800
x80469
426B
Sereja and Mirroring
implementation
1300
x3826
426A
Sereja and Mugs
implementation
800
x9279
425E
Sereja and Sets
dp
2500
x686
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1472
425C
Sereja and Two Sequences
data structures
,
dp
2300
x905
425B
Sereja and Table
bitmasks
,
greedy
2200
x1321
425A
Sereja and Swaps
brute force
,
sortings
1500
x3922
424E
Colored Jenga
dfs and similar
,
dp
,
probabilities
2500
x134
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x568
424C
Magic Formulas
math
1600
x5480
424B
Megacity
binary search
,
greedy
,
implementation
,
sortings
1200
x7803
424A
Squats
implementation
900
x8548
421D
Bug in Code
binary search
,
data structures
,
sortings
1900
x545
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x6165
420E
Playing the ball
geometry
2600
x219
420D
Cup Trick
data structures
2200
x849
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1269
420B
Online Meeting
implementation
1800
x1048
420A
Start Up
implementation
1000
x6285
418E
Tricky Password
data structures
3100
x320
418D
Big Problems for Organizers
data structures
,
graphs
,
trees
2800
x488
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x852
417D
Cunning Gena
bitmasks
,
dp
,
greedy
,
sortings
1900
x2547
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4692
417B
Crash
implementation
1400
x1802
417A
Elimination
dp
,
implementation
,
math
1500
x3066
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1547
416D
Population Size
greedy
,
implementation
,
math
2400
x958
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x8096
416B
Art Union
brute force
,
dp
,
implementation
1300
x8800
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x9022
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6344
415A
Mashmokh and Lights
implementation
900
x9058
414E
Mashmokh's Designed Problem
data structures
3200
x200
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x690
414C
Mashmokh and Reverse Operation
combinatorics
,
divide and conquer
2100
x2239
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x23020
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9878
413E
Maze 2D
data structures
,
divide and conquer
2200
x747
413D
2048
bitmasks
,
dp
2000
x824
413C
Jeopardy!
greedy
,
math
1400
x2393
413B
Spyke Chatting
implementation
1300
x1728
413A
Data Recovery
implementation
1200
x2678
412E
E-mail Addresses
implementation
1900
x847
412D
Giving Awards
dfs and similar
2000
x2078
412C
Pattern
implementation
,
strings
1200
x3955
412B
Network Configuration
greedy
,
sortings
900
x5489
412A
Poster
greedy
,
implementation
900
x4500
411C
Kicker
*special problem
,
implementation
1700
x1230
411B
Multi-core Processor
implementation
1600
x1284
411A
Password Check
*special problem
,
implementation
800
x7324
409I
Feed the Golorp
*special problem
2400
x127
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x9020
409G
On a plane
*special problem
,
geometry
2200
x521
409F
000001
*special problem
1900
x2097
409E
Dome
*special problem
1800
x579
409D
Big Data
*special problem
1700
x1719
409C
Magnum Opus
*special problem
1700
x1985
409B
Mysterious Language
*special problem
1700
x1364
409A
The Great Game
*special problem
1700
x2469
408B
Garland
implementation
1200
x9435
408A
Line to Cashier
implementation
900
x11363
407E
k-d-sequence
data structures
3100
x799
407D
Largest Submatrix 3
dp
,
hashing
2700
x680
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