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Name
441D
Valera and Swaps
constructive algorithms
,
dsu
,
graphs
,
implementation
,
math
,
string suffix structures
2100
x1064
441C
Valera and Tubes
constructive algorithms
,
dfs and similar
,
implementation
1500
x10880
439C
Devu and Partitioning of the Array
brute force
,
constructive algorithms
,
implementation
,
number theory
1700
x3802
432E
Square Tiling
constructive algorithms
,
greedy
2300
x664
430A
Points and Segments (easy)
constructive algorithms
,
sortings
1600
x2224
429C
Guess the Tree
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
trees
2300
x904
424D
Biathlon Track
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
2300
x558
421A
Pasha and Hamsters
constructive algorithms
,
implementation
800
x5794
417E
Square Table
constructive algorithms
,
math
,
probabilities
2400
x783
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4615
414A
Mashmokh and Numbers
constructive algorithms
,
number theory
1500
x9658
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8702
402C
Searching for Graph
brute force
,
constructive algorithms
,
graphs
1500
x5714
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19344
398C
Tree and Array
constructive algorithms
x208
398A
Cards
constructive algorithms
,
implementation
x911
397B
On Corruption and Numbers
constructive algorithms
,
implementation
,
math
x736
394C
Dominoes
constructive algorithms
,
greedy
x512
390D
Inna and Sweet Matrix
constructive algorithms
x506
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2441
379B
New Year Present
constructive algorithms
,
implementation
1200
x7194
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x615
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1509
369B
Valera and Contest
constructive algorithms
,
implementation
,
math
1400
x6304
361B
Levko and Permutation
constructive algorithms
,
math
,
number theory
1200
x7902
361A
Levko and Table
constructive algorithms
,
implementation
800
x16279
359E
Neatness
constructive algorithms
,
dfs and similar
2400
x461
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7747
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8398
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1956
357B
Flag Day
constructive algorithms
,
implementation
1400
x8054
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x939
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1231
355A
Vasya and Digital Root
constructive algorithms
,
implementation
1100
x9279
354E
Lucky Number Representation
constructive algorithms
,
dfs and similar
,
dp
2200
x873
353D
Queue
constructive algorithms
,
dp
2000
x2743
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2197
350E
Wrong Floyd
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
2200
x751
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8800
341E
Candies Game
constructive algorithms
,
greedy
3000
x432
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x539
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8164
335B
Palindrome
constructive algorithms
,
dp
1900
x2016
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2519
333C
Lucky Tickets
brute force
,
constructive algorithms
2700
x375
331E2
Deja Vu
constructive algorithms
,
dp
3100
x217
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x163
330B
Road Construction
constructive algorithms
,
graphs
1300
x16409
329D
The Evil Temple and the Moving Rocks
constructive algorithms
2500
x388
329C
Graph Reconstruction
constructive algorithms
2400
x880
329A
Purification
constructive algorithms
,
greedy
1500
x4599
327E
Axis Walking
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
meet-in-the-middle
2300
x1358
327D
Block Tower
constructive algorithms
,
dfs and similar
,
graphs
1900
x2226
323B
Tournament-graph
constructive algorithms
,
graphs
2200
x366
323A
Black-and-White Cube
combinatorics
,
constructive algorithms
1600
x723
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6850
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x153
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x491
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x164
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x542
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5535
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4001
306D
Polygon
constructive algorithms
,
geometry
2300
x263
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4647
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7726
301C
Yaroslav and Algorithm
constructive algorithms
2500
x461
301A
Yaroslav and Sequence
constructive algorithms
1800
x3050
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x22028
297D
Color the Carpet
constructive algorithms
2500
x499
297C
Splitting the Uniqueness
constructive algorithms
2400
x929
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3450
297A
Parity Game
constructive algorithms
1700
x3587
290E
HQ
*special problem
,
constructive algorithms
2500
x197
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x821
286A
Lucky Permutation
constructive algorithms
,
math
1400
x3112
283A
Cows and Sequence
constructive algorithms
,
data structures
,
implementation
1600
x6494
282C
XOR and OR
constructive algorithms
,
implementation
,
math
1500
x9149
277B
Set of Points
constructive algorithms
,
geometry
2300
x784
275B
Convex Shape
constructive algorithms
,
implementation
1700
x2788
272E
Dima and Horses
combinatorics
,
constructive algorithms
,
graphs
2200
x1176
271E
Three Horses
constructive algorithms
,
math
,
number theory
2200
x480
271C
Secret
constructive algorithms
,
implementation
1500
x2907
269C
Flawed Flow
constructive algorithms
,
flows
,
graphs
,
greedy
2100
x1622
268C
Beautiful Sets of Points
constructive algorithms
,
implementation
1500
x13297
266C
Below the Diagonal
constructive algorithms
,
greedy
,
math
2100
x1336
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x127910
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10627
261C
Maxim and Matrix
constructive algorithms
,
dp
,
math
2000
x761
260D
Black and White Tree
constructive algorithms
,
dsu
,
graphs
,
greedy
,
trees
2100
x1317
260C
Balls and Boxes
constructive algorithms
,
greedy
,
implementation
1700
x2930
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x6871
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2608
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9073
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2237
241G
Challenging Balloons
constructive algorithms
1900
x541
238B
Boring Partition
constructive algorithms
1800
x1268
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2010
234H
Merging Two Decks
constructive algorithms
,
greedy
2000
x557
234G
Practice
constructive algorithms
,
divide and conquer
,
implementation
1600
x1457
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x282
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