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Before contest
Codeforces Round 1003 (Div. 4)
37:28:29
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Difficulty:
—
interactive
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
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x14828
1807E
Interview
binary search
,
implementation
,
interactive
1300
x13862
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x13629
1546B
AquaMoon and Stolen String
interactive
,
math
1200
x13289
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x12888
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x12784
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x12537
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x12484
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x12438
2013C
Password Cracking
constructive algorithms
,
interactive
,
strings
1400
x12310
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x12076
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x11608
1999G1
Ruler (easy version)
binary search
,
interactive
1500
x11453
2001C
Guess The Tree
binary search
,
brute force
,
dfs and similar
,
divide and conquer
,
dsu
,
greedy
,
interactive
,
trees
1500
x11140
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x9917
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8824
1999G2
Ruler (hard version)
binary search
,
interactive
,
ternary search
1700
x8415
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7988
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x7793
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7700
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x7671
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x7251
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x7243
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x7169
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x7126
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x7066
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x6209
1425F
Flamingoes of Mystery
interactive
1400
x6186
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x6106
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5809
2037E
Kachina's Favorite Binary String
dp
,
greedy
,
interactive
,
two pointers
1600
x5730
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5480
1010B
Rocket
binary search
,
interactive
1800
x5291
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x5125
2032D
Genokraken
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
interactive
,
trees
,
two pointers
1800
x5108
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x5096
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4811
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4715
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4571
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x4500
1634D
Finding Zero
constructive algorithms
,
interactive
,
math
2000
x4459
1521C
Nastia and a Hidden Permutation
constructive algorithms
,
interactive
2000
x4412
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x4385
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x4127
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x4098
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3898
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3774
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3764
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3749
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3746
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3595
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3442
1856D
More Wrong
divide and conquer
,
interactive
2100
x3362
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x3315
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3304
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x3260
1628C
Grid Xor
constructive algorithms
,
greedy
,
implementation
,
interactive
,
math
2300
x3258
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x3155
2022D1
Asesino (Easy Version)
binary search
,
brute force
,
constructive algorithms
,
implementation
,
interactive
1900
x3138
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x3114
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x3087
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x3058
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2921
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2920
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2836
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2517
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2460
1033D
Divisors
interactive
,
math
,
number theory
2000
x2457
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2423
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2422
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2365
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2342
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x2299
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x2295
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2268
2038G
Guess One Character
constructive algorithms
,
implementation
,
interactive
1900
x2171
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2162
1903E
Geo Game
greedy
,
interactive
,
math
2000
x2136
952B
A Map of the Cat
*special problem
,
brute force
,
interactive
1900
x2071
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x2067
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x2037
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1992
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1988
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1984
1019B
The hat
binary search
,
interactive
2000
x1979
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1967
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x1908
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1842
1617D2
Too Many Impostors (hard version)
constructive algorithms
,
implementation
,
interactive
,
math
2400
x1841
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1810
744B
Hongcow's Game
bitmasks
,
divide and conquer
,
interactive
1900
x1800
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1791
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1769
1406E
Deleting Numbers
interactive
,
math
,
number theory
2600
x1747
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1722
809B
Glad to see you!
binary search
,
interactive
2200
x1693
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1650
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1618
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1549
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1527
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