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Problems
#
Name
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2796
771A
Bear and Friendship Condition
dfs and similar
,
dsu
,
graphs
1500
x14662
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2537
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x2118
768B
Code For 1
constructive algorithms
,
dfs and similar
,
divide and conquer
1600
x5849
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3984
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2850
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3271
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1246
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10142
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x1904
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x443
756A
Pavel and barbecue
constructive algorithms
,
dfs and similar
1700
x2960
755C
PolandBall and Forest
dfs and similar
,
dsu
,
graphs
,
interactive
,
trees
1300
x11715
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x187
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3056
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x633
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1938
744A
Hongcow Builds A Nation
dfs and similar
,
graphs
1500
x7926
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4253
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2458
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2380
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5141
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5402
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4432
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x3738
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2251
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6796
730C
Bulmart
binary search
,
dfs and similar
2100
x1007
727A
Transformation: from A to B
brute force
,
dfs and similar
,
math
1000
x13240
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1885
723D
Lakes in Berland
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1600
x6824
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3090
720B
Cactusophobia
dfs and similar
,
flows
2400
x392
717E
Paint it really, really dark gray
dfs and similar
1900
x1427
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x1941
711D
Directed Roads
combinatorics
,
dfs and similar
,
graphs
,
math
1900
x4365
710E
Generate a String
dfs and similar
,
dp
2000
x4982
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3015
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2603
700C
Break Up
dfs and similar
,
graphs
2600
x1220
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3787
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5617
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3390
691D
Swaps in Permutation
dfs and similar
,
dsu
,
math
1700
x5308
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3585
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5612
687E
TOF
dfs and similar
,
graphs
2900
x310
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x13794
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x3790
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7010
681D
Gifts by the List
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2000
x1720
679D
Bear and Chase
brute force
,
dfs and similar
,
graphs
,
implementation
,
math
,
probabilities
2900
x311
679C
Bear and Square Grid
dfs and similar
,
dsu
,
implementation
2400
x1132
662B
Graph Coloring
dfs and similar
,
graphs
2200
x1446
659F
Polycarp and Hay
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
2000
x1753
659E
New Reform
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x7331
653E
Bear and Forgotten Tree 2
dfs and similar
,
dsu
,
graphs
,
trees
2400
x1379
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4893
652E
Pursuit For Artifacts
dfs and similar
,
dsu
,
graphs
,
trees
2300
x1964
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x586
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x1942
648C
Путь Робота
constructive algorithms
,
dfs and similar
,
graphs
1100
x847
639F
Bear and Chemistry
data structures
,
dfs and similar
,
graphs
,
trees
3300
x394
638D
Three-dimensional Turtle Super Computer
brute force
,
dfs and similar
,
graphs
1800
x687
638C
Road Improvement
*special problem
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x1494
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1932
633G
Yash And Trees
bitmasks
,
data structures
,
dfs and similar
,
math
,
number theory
2800
x722
633F
The Chocolate Spree
dfs and similar
,
dp
,
graphs
,
trees
2600
x903
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x969
627F
Island Puzzle
dfs and similar
,
dsu
,
graphs
,
trees
3400
x233
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x798
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x1989
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1692
616C
The Labyrinth
dfs and similar
1600
x5352
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x2695
612E
Square Root of Permutation
combinatorics
,
constructive algorithms
,
dfs and similar
,
graphs
,
math
2200
x1585
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6987
605D
Board Game
data structures
,
dfs and similar
2500
x789
603B
Moodular Arithmetic
combinatorics
,
dfs and similar
,
dsu
,
math
,
number theory
1800
x2538
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1091
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12727
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10555
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x388
593D
Happy Tree Party
data structures
,
dfs and similar
,
graphs
,
math
,
trees
2400
x1178
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2357
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2663
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3487
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x39953
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1573
575G
Run for beer
dfs and similar
,
shortest paths
2200
x867
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1039
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7613
573C
Bear and Drawing
constructive algorithms
,
dfs and similar
,
trees
2300
x953
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x611
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6700
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1645
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x695
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x871
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2139
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