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2023 Post World Finals Online ICPC Challenge powered by Huawei
20:39:13
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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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Custom test
Problems
#
Name
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8257
1770B
Koxia and Permutation
constructive algorithms
1000
x19006
1770A
Koxia and Whiteboards
brute force
,
greedy
1000
x22853
1769D3
Игра в Девятку III
*special problem
,
brute force
2300
x115
1769D2
Игра в Девятку II
*special problem
,
brute force
2200
x186
1769D1
Игра в Девятку I
*special problem
,
brute force
,
dp
1800
x367
1769C2
Подкрутка II
*special problem
,
dp
1300
x912
1769C1
Подкрутка I
*special problem
,
brute force
,
dp
,
greedy
1200
x928
1769B2
Копирование файлов II
*special problem
,
binary search
,
brute force
,
math
1400
x854
1769B1
Копирование файлов I
*special problem
,
brute force
,
implementation
,
math
1000
x1310
1769A
Узкая дорога
*special problem
,
math
800
x1896
1768F
Wonderful Jump
dp
,
greedy
2900
x781
1768E
Partial Sorting
combinatorics
,
math
,
number theory
2300
x1777
1768D
Lucky Permutation
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1800
x6681
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13540
1768B
Quick Sort
greedy
,
math
900
x22016
1768A
Greatest Convex
greedy
,
math
,
number theory
800
x27983
1767F
Two Subtrees
data structures
,
trees
3100
x245
1767E
Algebra Flash
bitmasks
,
brute force
,
dp
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x831
1767D
Playoff
combinatorics
,
constructive algorithms
,
dp
,
greedy
,
math
1500
x9397
1767C
Count Binary Strings
data structures
,
dp
2100
x2500
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19562
1767A
Cut the Triangle
implementation
800
x20129
1766F
MCF
flows
2800
x256
1766E
Decomposition
binary search
,
brute force
,
data structures
,
divide and conquer
,
dp
,
two pointers
2300
x1125
1766D
Lucky Chains
math
,
number theory
1600
x8349
1766C
Hamiltonian Wall
dp
,
implementation
1300
x13071
1766B
Notepad#
implementation
1000
x20077
1766A
Extremely Round
brute force
,
implementation
800
x23878
1765N
Number Reduction
greedy
1500
x4415
1765M
Minimum LCM
math
,
number theory
1000
x12596
1765L
Project Manager
brute force
,
data structures
,
implementation
2400
x561
1765K
Torus Path
greedy
,
math
1500
x5372
1765J
Hero to Zero
graph matchings
,
math
2900
x185
1765I
Infinite Chess
implementation
,
shortest paths
2800
x181
1765H
Hospital Queue
binary search
,
graphs
,
greedy
,
implementation
2200
x1189
1765G
Guess the String
constructive algorithms
,
interactive
,
probabilities
2600
x366
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x587
1765E
Exchange
brute force
,
math
1000
x9514
1765D
Watch the Videos
binary search
,
constructive algorithms
,
two pointers
1700
x3909
1765C
Card Guessing
combinatorics
,
dp
,
probabilities
2600
x364
1765B
Broken Keyboard
greedy
800
x8713
1765A
Access Levels
bitmasks
,
dsu
,
flows
,
graph matchings
2400
x660
1764H
Doremy's Paint 2
data structures
3400
x165
1764G3
Doremy's Perfect DS Class (Hard Version)
binary search
,
interactive
3300
x431
1764G2
Doremy's Perfect DS Class (Medium Version)
binary search
,
interactive
3000
x495
1764G1
Doremy's Perfect DS Class (Easy Version)
binary search
,
interactive
2900
x546
1764F
Doremy's Experimental Tree
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
sortings
,
trees
2500
x883
1764E
Doremy's Number Line
dp
,
greedy
,
sortings
2400
x1176
1764D
Doremy's Pegging Game
combinatorics
,
dp
,
math
2000
x2638
1764C
Doremy's City Construction
graphs
,
greedy
1400
x9048
1764B
Doremy's Perfect Math Class
math
,
number theory
900
x15248
1764A
Doremy's Paint
greedy
800
x16184
1763F
Edge Queries
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
3000
x417
1763E
Node Pairs
dp
,
graphs
,
math
,
number theory
2200
x1694
1763D
Valid Bitonic Permutations
combinatorics
,
dp
,
implementation
,
math
,
number theory
2200
x1954
1763C
Another Array Problem
brute force
,
constructive algorithms
,
greedy
2000
x6272
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13877
1763A
Absolute Maximization
bitmasks
,
constructive algorithms
,
greedy
,
math
800
x15255
1762G
Unequal Adjacent Elements
constructive algorithms
,
sortings
3100
x99
1762F
Good Pairs
binary search
,
data structures
,
dp
2600
x559
1762E
Tree Sum
combinatorics
,
math
,
trees
2600
x601
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3285
1762C
Binary Strings are Fun
combinatorics
,
math
1400
x8844
1762B
Make Array Good
constructive algorithms
,
implementation
,
number theory
,
sortings
1100
x16180
1762A
Divide and Conquer
greedy
,
math
,
number theory
800
x18532
1761G
Centroid Guess
interactive
,
probabilities
,
trees
3500
x96
1761F2
Anti-median (Hard Version)
combinatorics
,
dp
,
math
3500
x77
1761F1
Anti-median (Easy Version)
dp
,
math
3100
x198
1761E
Make It Connected
binary search
,
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
matrices
,
trees
,
two pointers
2400
x1727
1761D
Carry Bit
combinatorics
,
math
2100
x2325
1761C
Set Construction
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1400
x9157
1761B
Elimination of a Ring
constructive algorithms
,
greedy
,
implementation
1000
x12994
1761A
Two Permutations
brute force
,
constructive algorithms
800
x16864
1760G
SlavicG's Favorite Problem
bitmasks
,
dfs and similar
,
graphs
1700
x6869
1760F
Quests
binary search
,
greedy
,
sortings
1500
x11271
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19168
1760D
Challenging Valleys
implementation
,
two pointers
1000
x22328
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34960
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41651
1760A
Medium Number
implementation
,
sortings
800
x53679
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4217
1759F
All Possible Digits
binary search
,
data structures
,
greedy
,
math
,
number theory
1800
x3690
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x9916
1759D
Make It Round
brute force
,
number theory
1400
x12052
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x16971
1759B
Lost Permutation
math
800
x21601
1759A
Yes-Yes?
implementation
,
strings
800
x28745
1758F
Decent Division
constructive algorithms
,
data structures
3000
x154
1758E
Tick, Tock
combinatorics
,
dfs and similar
,
dsu
,
graphs
2500
x777
1758D
Range = √Sum
binary search
,
brute force
,
constructive algorithms
,
math
,
two pointers
1800
x6857
1758C
Almost All Multiples
greedy
,
number theory
1400
x12886
1758B
XOR = Average
constructive algorithms
900
x20079
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x24362
1754B
Kevin and Permutation
constructive algorithms
,
greedy
,
math
800
x18493
1754A
Technical Support
greedy
800
x22606
1753F
Minecraft Series
brute force
,
two pointers
3500
x185
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x308
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1664
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4162
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