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Problems
#
Name
1505A
Is it rated - 2
*special problem
,
implementation
,
interactive
900
x14031
1546B
AquaMoon and Stolen String
interactive
,
math
1200
x12863
679A
Bear and Prime 100
constructive algorithms
,
interactive
,
math
1400
x12406
1807E
Interview
binary search
,
implementation
,
interactive
1300
x11943
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11715
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x11664
1407C
Chocolate Bunny
constructive algorithms
,
interactive
,
math
,
two pointers
1600
x11433
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x11134
1520F1
Guess the K-th Zero (Easy version)
binary search
,
interactive
1600
x10981
1167B
Lost Numbers
brute force
,
divide and conquer
,
interactive
,
math
1400
x10731
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10611
1698D
Fixed Point Guessing
binary search
,
constructive algorithms
,
interactive
1600
x8723
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8144
1543D1
RPD and Rap Sheet (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
1700
x7450
1797C
Li Hua and Chess
constructive algorithms
,
greedy
,
interactive
1600
x7254
727C
Guess the Array
constructive algorithms
,
interactive
,
math
1400
x6941
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6848
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6749
1621C
Hidden Permutations
dfs and similar
,
interactive
,
math
1700
x6733
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6618
1556D
Take a Guess
bitmasks
,
constructive algorithms
,
interactive
,
math
1800
x6515
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x6092
1534D
Lost Tree
constructive algorithms
,
interactive
,
trees
1800
x5784
1207E
XOR Guessing
bitmasks
,
interactive
,
math
1900
x5631
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5479
1425F
Flamingoes of Mystery
interactive
1400
x5276
1583D
Omkar and the Meaning of Life
constructive algorithms
,
greedy
,
interactive
1800
x5245
1010B
Rocket
binary search
,
interactive
1800
x5075
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4757
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4662
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4538
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4399
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4290
1521C
Nastia and a Hidden Permutation
constructive algorithms
,
interactive
2000
x4285
1634D
Finding Zero
constructive algorithms
,
interactive
,
math
2000
x4237
1451E1
Bitwise Queries (Easy Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2000
x4206
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3830
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x3720
1867E1
Salyg1n and Array (simple version)
constructive algorithms
,
interactive
,
math
2000
x3534
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3531
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3525
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3491
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3299
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3240
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3183
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3171
1856D
More Wrong
divide and conquer
,
interactive
2100
x3095
1628C
Grid Xor
constructive algorithms
,
greedy
,
implementation
,
interactive
,
math
2300
x3087
1867E2
Salyg1n and Array (hard version)
constructive algorithms
,
interactive
2200
x2997
1520F2
Guess the K-th Zero (Hard version)
binary search
,
constructive algorithms
,
data structures
,
interactive
2200
x2904
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x2890
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2870
1451E2
Bitwise Queries (Hard Version)
bitmasks
,
constructive algorithms
,
interactive
,
math
2300
x2840
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2792
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2776
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2764
1535E
Gold Transfer
binary search
,
data structures
,
dp
,
greedy
,
interactive
,
trees
2200
x2642
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2381
1056C
Pick Heroes
greedy
,
implementation
,
interactive
,
sortings
1700
x2320
1033D
Divisors
interactive
,
math
,
number theory
2000
x2310
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2279
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2240
1592D
Hemose in ICPC ?
binary search
,
dfs and similar
,
implementation
,
interactive
,
math
,
number theory
,
trees
2300
x2166
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2148
1672E
notepad.exe
binary search
,
constructive algorithms
,
greedy
,
interactive
2200
x2095
1282D
Enchanted Artifact
constructive algorithms
,
interactive
,
strings
2300
x2067
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2052
952B
A Map of the Cat
brute force
,
interactive
1900
x2003
1023E
Down or Right
constructive algorithms
,
interactive
,
matrices
2100
x1956
1543D2
RPD and Rap Sheet (Hard Version)
brute force
,
constructive algorithms
,
interactive
,
math
2200
x1946
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1933
1019B
The hat
binary search
,
interactive
2000
x1891
1534E
Lost Array
graphs
,
greedy
,
interactive
,
shortest paths
2300
x1855
1498E
Two Houses
brute force
,
graphs
,
greedy
,
interactive
,
sortings
2200
x1839
1903E
Geo Game
greedy
,
interactive
,
math
2000
x1814
1617D2
Too Many Impostors (hard version)
constructive algorithms
,
implementation
,
interactive
,
math
2400
x1708
744B
Hongcow's Game
bitmasks
,
divide and conquer
,
interactive
1900
x1707
1779E
Anya's Simultaneous Exhibition
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
2400
x1693
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1678
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x1652
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1566
1406E
Deleting Numbers
interactive
,
math
,
number theory
2600
x1554
1044B
Intersecting Subtrees
dfs and similar
,
interactive
,
trees
1900
x1550
811D
Vladik and Favorite Game
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2100
x1526
1137D
Cooperative Game
constructive algorithms
,
interactive
,
number theory
2400
x1475
1174F
Ehab and the Big Finale
constructive algorithms
,
divide and conquer
,
graphs
,
implementation
,
interactive
,
trees
2400
x1454
1117E
Decypher the String
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
interactive
,
math
2200
x1454
809B
Glad to see you!
binary search
,
interactive
2200
x1454
1153E
Serval and Snake
binary search
,
brute force
,
interactive
2200
x1449
713B
Searching Rectangles
binary search
,
constructive algorithms
,
interactive
2200
x1420
1155E
Guess the Root
brute force
,
interactive
,
math
2200
x1391
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1384
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1367
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1366
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1307
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1263
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1260
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1246
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1208
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1194
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
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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
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shortest paths
sortings
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ternary search
trees
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