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Refact.ai Match 1 (Codeforces Round 985)
5 days
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Difficulty:
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trees
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
#
Name
2035G1
Go Learn! (Easy Version)
dp
,
trees
3300
x100
2035F
Tree Operations
binary search
,
brute force
,
dfs and similar
,
dp
,
trees
2500
x619
2033G
Sakurako and Chefir
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
2200
x1047
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
interactive
,
trees
,
two pointers
x3715
2026F
Bermart Ice Cream
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
implementation
,
trees
x113
2025F
Choose Your Queries
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2700
x619
2023E
Tree of Life
dp
,
greedy
,
trees
3300
x70
2021E3
Digital Village (Extreme Version)
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
math
,
trees
2800
x393
2021E2
Digital Village (Hard Version)
data structures
,
dp
,
dsu
,
graphs
,
math
,
trees
2500
x759
2021E1
Digital Village (Easy Version)
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
fft
,
graphs
,
greedy
,
implementation
,
math
,
trees
2300
x1410
2020D
Connect the Dots
brute force
,
dp
,
dsu
,
graphs
,
math
,
trees
1800
x5495
2018C
Tree Pruning
brute force
,
dfs and similar
,
greedy
,
sortings
,
trees
1700
x5989
2014F
Sheriff's Defense
dfs and similar
,
dp
,
greedy
,
trees
2000
x3418
2013F2
Game in Tree (Hard Version)
binary search
,
data structures
,
trees
3500
x99
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x458
2006E
Iris's Full Binary Tree
brute force
,
data structures
,
dfs and similar
,
trees
3100
x216
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x3242
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x6627
2002D2
DFS Checker (Hard Version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
2300
x2345
2002D1
DFS Checker (Easy Version)
brute force
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
trees
1900
x4295
2001E2
Deterministic Heap (Hard Version)
combinatorics
,
dp
,
trees
2900
x213
2001E1
Deterministic Heap (Easy Version)
combinatorics
,
dp
,
math
,
trees
2400
x1248
2001C
Guess The Tree
binary search
,
brute force
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
interactive
,
trees
1500
x10574
1997D
Maximize the Root
binary search
,
dfs and similar
,
dp
,
greedy
,
trees
1500
x12386
1994F
Stardew Valley
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x1187
1994E
Wooden Game
bitmasks
,
greedy
,
math
,
trees
2000
x4447
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x5686
1990E2
Catch the Mole(Hard Version)
binary search
,
data structures
,
dfs and similar
,
divide and conquer
,
interactive
,
trees
2600
x855
1990E1
Catch the Mole(Easy Version)
binary search
,
data structures
,
dfs and similar
,
interactive
,
trees
2500
x915
1988D
The Omnipotent Monster Killer
brute force
,
dfs and similar
,
dp
,
trees
2000
x4885
1987G2
Spinning Round (Hard Version)
divide and conquer
,
dp
,
trees
3500
x169
1987G1
Spinning Round (Easy Version)
divide and conquer
,
dp
,
trees
2900
x271
1987E
Wonderful Tree!
brute force
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
2000
x3364
1986F
Non-academic Problem
dfs and similar
,
graphs
,
trees
1900
x4536
1984E
Shuffle
dp
,
greedy
,
trees
2400
x1391
1983G
Your Loss
bitmasks
,
brute force
,
dp
,
trees
3000
x209
1981F
Turtle and Paths on a Tree
data structures
,
dp
,
trees
3000
x267
1980G
Yasya and the Mysterious Tree
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
strings
,
trees
2300
x1236
1976F
Remove Bridges
data structures
,
dfs and similar
,
dp
,
greedy
,
sortings
,
trees
2800
x582
1976E
Splittable Permutations
combinatorics
,
data structures
,
dfs and similar
,
greedy
,
math
,
trees
2500
x1032
1975E
Chain Queries
binary search
,
data structures
,
dfs and similar
,
implementation
,
trees
2100
x2301
1975D
Paint the Tree
brute force
,
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1700
x5982
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x334
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x579
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x1334
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x1568
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x2726
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x460
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x440
1967C
Fenwick Tree
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
math
,
trees
2300
x1768
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x437
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x491
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x272
1950F
0, 1, 2, Tree!
bitmasks
,
brute force
,
greedy
,
implementation
,
trees
1700
x9151
1949J
Amanda the Amoeba
graphs
,
implementation
,
trees
,
two pointers
2600
x389
1949F
Dating
greedy
,
sortings
,
trees
2200
x978
1949C
Annual Ants' Gathering
dfs and similar
,
dp
,
greedy
,
trees
1900
x1748
1948G
MST with Matching
bitmasks
,
brute force
,
dsu
,
graph matchings
,
trees
3100
x695
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x10965
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x2120
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x93
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x35
1939B
Evidence Board
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
x246
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x450
1930H
Interactive Mex Tree
constructive algorithms
,
dfs and similar
,
interactive
,
trees
3300
x169
1930G
Prefix Max Set Counting
data structures
,
dp
,
trees
3100
x338
1929F
Sasha and the Wedding Binary Search Tree
brute force
,
combinatorics
,
data structures
,
dfs and similar
,
math
,
trees
2300
x1802
1929E
Sasha and the Happy Tree Cutting
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
2300
x1695
1929D
Sasha and a Walk in the City
combinatorics
,
dp
,
math
,
trees
1900
x4810
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x4406
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x3593
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x3901
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x535
1919H
Tree Diameter
interactive
,
trees
2000
x144
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x181
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3907
1918F
Caterpillar on a Tree
dfs and similar
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
2500
x872
1917F
Construct Tree
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x973
1916G
Optimizations From Chelsu
divide and conquer
,
dp
,
number theory
,
trees
3500
x148
1916E
Happy Life in University
data structures
,
dfs and similar
,
greedy
,
trees
2300
x2263
1914G1
Light Bulbs (Easy Version)
brute force
,
combinatorics
,
dfs and similar
,
dp
,
dsu
,
graphs
,
math
,
trees
2100
x1907
1914F
Programming Competition
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
1900
x4146
1913D
Array Collapse
data structures
,
divide and conquer
,
dp
,
trees
2100
x3199
1910F
Build Railway Stations
*special problem
,
greedy
,
trees
2000
x177
1905E
One-X
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
2400
x998
1905B
Begginer's Zelda
greedy
,
trees
1100
x16517
1904F
Beautiful Tree
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2800
x382
1904E
Tree Queries
data structures
,
dfs and similar
,
graphs
,
implementation
,
trees
2500
x1018
1903F
Babysitting
2-sat
,
binary search
,
data structures
,
graphs
,
trees
2500
x638
1902F
Trees and XOR Queries Again
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
implementation
,
math
,
trees
2400
x1033
1902E
Collapsing Strings
data structures
,
strings
,
trees
1900
x4357
1901E
Compressed Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
sortings
,
trees
2200
x1556
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x11630
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x3252
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x7720
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x6107
1891F
A Growing Tree
data structures
,
dfs and similar
,
trees
2000
x3838
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x81
1889E
Doremy's Swapping Trees
dfs and similar
,
graphs
,
trees
3500
x111
1889D
Game of Stacks
brute force
,
dfs and similar
,
graphs
,
implementation
,
trees
3000
x615
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