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Problems
#
Name
50D
Bombing
binary search
,
dp
,
probabilities
2100
x596
1387A
Graph
*special problem
,
binary search
,
dfs and similar
,
dp
,
math
,
ternary search
2100
x672
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x772
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x909
400E
Inna and Binary Logic
binary search
,
bitmasks
,
data structures
2100
x934
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x955
615E
Hexagons
binary search
,
implementation
,
math
2100
x964
730C
Bulmart
binary search
,
dfs and similar
2100
x1007
1070E
Getting Deals Done
binary search
,
data structures
2100
x1191
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1293
862E
Mahmoud and Ehab and the function
binary search
,
data structures
,
sortings
2100
x1390
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1442
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1513
1866G
Grouped Carriages
binary search
,
data structures
,
dp
,
flows
,
greedy
2100
x1526
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1705
549H
Degenerate Matrix
binary search
,
math
2100
x1785
333D
Characteristics of Rectangles
binary search
,
bitmasks
,
brute force
,
implementation
,
sortings
2100
x1849
540E
Infinite Inversions
binary search
,
data structures
,
implementation
,
sortings
,
trees
2100
x2011
1801D
The way home
binary search
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x2056
431D
Random Task
binary search
,
bitmasks
,
combinatorics
,
dp
,
math
2100
x2105
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2128
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2138
1808D
Petya, Petya, Petr, and Palindromes
binary search
,
brute force
,
data structures
,
two pointers
2100
x2172
767D
Cartons of milk
binary search
,
data structures
,
greedy
,
sortings
,
two pointers
2100
x2195
985D
Sand Fortress
binary search
,
constructive algorithms
,
math
2100
x2256
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2279
1201D
Treasure Hunting
binary search
,
dp
,
greedy
,
implementation
2100
x2288
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2358
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2368
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2453
1732C2
Sheikh (Hard Version)
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
two pointers
2100
x2463
955C
Sad powers
binary search
,
math
,
number theory
2100
x2464
1167E
Range Deleting
binary search
,
combinatorics
,
data structures
,
two pointers
2100
x2539
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2565
525E
Anya and Cubes
binary search
,
bitmasks
,
brute force
,
dp
,
math
,
meet-in-the-middle
2100
x2761
1832D1
Red-Blue Operations (Easy Version)
binary search
,
greedy
,
implementation
,
math
2100
x2803
1284D
New Year and Conference
binary search
,
data structures
,
hashing
,
sortings
2100
x2916
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3046
689D
Friends and Subsequences
binary search
,
data structures
2100
x3070
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3119
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3191
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3260
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3399
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3792
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3808
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3830
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3953
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3961
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4104
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4290
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4373
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4616
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4732
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6125
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6222
1486D
Max Median
binary search
,
data structures
,
dp
2100
x6764
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6790
1211E
Double Permutation Inc.
*special problem
,
binary search
,
greedy
2000
x188
1211D
Teams
*special problem
,
binary search
,
greedy
,
math
2000
x224
774L
Bars
*special problem
,
binary search
2000
x323
309A
Morning run
binary search
,
math
,
two pointers
2000
x459
73B
Need For Brake
binary search
,
greedy
,
sortings
2000
x488
131F
Present to Mom
binary search
,
two pointers
2000
x601
248C
Robo-Footballer
binary search
,
geometry
2000
x794
374D
Inna and Sequence
binary search
,
data structures
,
dp
,
trees
2000
x844
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x860
163B
Lemmings
binary search
2000
x1046
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x1270
382B
Number Busters
binary search
,
math
2000
x1386
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1454
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1544
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1552
862D
Mahmoud and Ehab and the binary string
binary search
,
divide and conquer
,
interactive
2000
x1652
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1759
1165F1
Microtransactions (easy version)
binary search
,
greedy
2000
x1776
954E
Water Taps
binary search
,
greedy
,
sortings
2000
x1834
1019B
The hat
binary search
,
interactive
2000
x1891
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x1903
1102F
Elongated Matrix
binary search
,
bitmasks
,
brute force
,
dp
,
graphs
2000
x1916
21C
Stripe 2
binary search
,
dp
,
sortings
2000
x2023
1165F2
Microtransactions (hard version)
binary search
,
greedy
,
implementation
2000
x2038
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2052
1881G
Anya and the Mysterious String
binary search
,
data structures
2000
x2177
1741F
Multi-Colored Segments
binary search
,
data structures
,
math
,
sortings
2000
x2236
1619G
Unusual Minesweeper
binary search
,
dfs and similar
,
dsu
,
greedy
,
sortings
2000
x2275
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2473
1029F
Multicolored Markers
binary search
,
brute force
,
math
,
number theory
2000
x2476
749D
Leaving Auction
binary search
,
data structures
2000
x2527
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2574
1862G
The Great Equalizer
binary search
,
data structures
,
math
,
sortings
2000
x2669
360B
Levko and Array
binary search
,
dp
2000
x2705
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2944
671B
Robin Hood
binary search
,
greedy
2000
x2967
474E
Pillars
binary search
,
data structures
,
dp
,
sortings
,
trees
2000
x3130
1103B
Game with modulo
binary search
,
constructive algorithms
,
interactive
2000
x3171
1624F
Interacdive Problem
binary search
,
constructive algorithms
,
interactive
2000
x3183
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3232
1690G
Count the Trains
binary search
,
data structures
,
greedy
,
sortings
2000
x3262
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3362
1584D
Guess the Permutation
binary search
,
combinatorics
,
interactive
,
math
2000
x3531
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binary search
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
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