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Problems
#
Name
319B
Psychos in a Line
data structures
,
implementation
1900
x4031
316E3
Summer Homework
data structures
,
math
2300
x505
316E2
Summer Homework
data structures
,
math
2300
x380
316E1
Summer Homework
brute force
,
data structures
1500
x1447
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x515
314C
Sereja and Subsequences
data structures
,
dp
2000
x1792
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x541
311D
Interval Cubing
data structures
,
math
2600
x659
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
311B
Cats Transport
data structures
,
dp
2400
x3238
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x437
301D
Yaroslav and Divisors
data structures
2200
x2216
297E
Mystic Carvings
data structures
3000
x353
295E
Yaroslav and Points
data structures
2500
x649
295A
Greg and Array
data structures
,
implementation
1400
x16134
293E
Close Vertices
data structures
,
divide and conquer
,
trees
2700
x1272
292E
Copying Data
data structures
1900
x3928
292D
Connected Components
data structures
,
dfs and similar
,
dp
,
dsu
1900
x2318
286D
Tourists
data structures
,
sortings
2600
x371
283E
Cow Tennis Tournament
combinatorics
,
data structures
,
math
2800
x720
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6488
282E
Sausage Maximization
bitmasks
,
data structures
,
trees
2200
x3370
280E
Sequence Transformation
brute force
,
data structures
,
dp
,
implementation
,
math
3000
x198
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1193
280B
Maximum Xor Secondary
data structures
,
implementation
,
two pointers
1800
x4381
276E
Little Girl and Problem on Trees
data structures
,
graphs
,
trees
2100
x1551
276C
Little Girl and Maximum Sum
data structures
,
greedy
,
implementation
,
sortings
1500
x24178
274E
Mirror Room
data structures
,
implementation
3000
x302
272C
Dima and Staircase
data structures
,
implementation
1500
x6689
271D
Good Substrings
data structures
,
strings
1800
x10374
270B
Multithreading
data structures
,
greedy
,
implementation
1400
x4084
269D
Maximum Waterfall
data structures
,
dp
,
graphs
,
sortings
2600
x424
266E
More Queries to Array...
data structures
,
math
2500
x720
264E
Roadside Trees
data structures
,
dp
3000
x396
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10617
263E
Rhombus
brute force
,
data structures
,
dp
2500
x394
260E
Dividing Kingdom
binary search
,
brute force
,
data structures
2500
x416
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1033
257E
Greedy Elevator
data structures
,
implementation
2200
x275
256E
Lucky Arrays
data structures
2400
x655
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x522
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2531
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x394
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2982
243E
Matrix
data structures
3000
x171
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x208
242E
XOR on Segment
bitmasks
,
data structures
2000
x8481
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x752
240F
TorCoder
data structures
2600
x1798
238D
Tape Programming
data structures
,
implementation
2900
x244
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x2018
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x441
231E
Cactus
data structures
,
dfs and similar
,
dp
,
graphs
,
trees
2100
x1550
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4474
228D
Zigzag
data structures
2100
x374
226E
Noble Knight's Path
data structures
,
trees
2900
x436
226C
Anniversary
data structures
,
implementation
,
math
,
matrices
,
number theory
2400
x846
223B
Two Strings
data structures
,
dp
,
strings
1900
x1722
223A
Bracket Sequence
data structures
,
expression parsing
,
implementation
1700
x2483
222B
Cosmic Tables
data structures
,
implementation
1300
x5986
220E
Little Elephant and Inversions
data structures
,
two pointers
2400
x1337
220C
Little Elephant and Shifts
data structures
2100
x926
220B
Little Elephant and Array
constructive algorithms
,
data structures
1800
x9462
219E
Parking Lot
data structures
2200
x603
217E
Alien DNA
data structures
,
dsu
,
trees
2800
x291
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x770
212D
Cutting a Fence
binary search
,
data structures
,
dsu
2500
x451
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6136
207C3
Game with Two Trees
data structures
2700
x118
204E
Little Elephant and Strings
data structures
,
implementation
,
string suffix structures
,
two pointers
2800
x1095
204B
Little Elephant and Cards
binary search
,
data structures
1500
x5032
200A
Cinema
brute force
,
data structures
2400
x660
198E
Gripping Story
binary search
,
data structures
,
sortings
2400
x403
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x521
195E
Building Forest
data structures
,
dsu
,
graphs
2000
x688
195B
After Training
data structures
,
implementation
,
math
1300
x5126
193D
Two Segments
data structures
2900
x388
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x806
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x6760
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1442
187E
Heaven Tour
data structures
,
greedy
2900
x93
187D
BRT Contract
data structures
2800
x501
185E
Soap Time! - 2
binary search
,
data structures
3000
x103
182C
Optimal Sum
data structures
,
greedy
2000
x709
177D2
Encrypting Messages
data structures
1500
x1786
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1034
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
174C
Range Increments
data structures
,
greedy
1800
x1069
173E
Camping Groups
data structures
,
sortings
2600
x535
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x190
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1590
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1531
160E
Buses and People
binary search
,
data structures
,
sortings
2400
x576
159E
Zebra Tower
*special problem
,
data structures
,
greedy
,
sortings
1700
x989
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2921
158C
Cd and pwd commands
*special problem
,
data structures
,
implementation
1400
x8908
156B
Suspects
constructive algorithms
,
data structures
,
implementation
1600
x2189
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x790
150C
Smart Cheater
data structures
,
math
,
probabilities
2200
x630
145E
Lucky Queries
data structures
2400
x2953
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