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constructive algorithms
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
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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#
Name
976D
Degree Set
constructive algorithms
,
graphs
,
implementation
2500
x496
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x468
909F
AND-permutations
constructive algorithms
2500
x386
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x371
297D
Color the Carpet
constructive algorithms
2500
x360
301C
Yaroslav and Algorithm
constructive algorithms
2500
x351
1228F
One Node is Gone
constructive algorithms
,
implementation
,
trees
2500
x324
329D
The Evil Temple and the Moving Rocks
constructive algorithms
2500
x311
1250M
SmartGarden
constructive algorithms
,
divide and conquer
2500
x274
753C
Interactive Bulls and Cows (Hard)
brute force
,
constructive algorithms
,
interactive
2500
x221
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x205
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x203
98D
Help Monks
constructive algorithms
2500
x148
290E
HQ
*special problem
,
constructive algorithms
2500
x139
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x1452
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x1393
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x1240
1439B
Graph Subset Problem
constructive algorithms
,
data structures
,
graphs
2600
x875
1391E
Pairs of Pairs
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2600
x873
1091F
New Year and the Mallard Expedition
constructive algorithms
,
greedy
2600
x627
1340D
Nastya and Time Machine
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2600
x536
1355F
Guess Divisors Count
constructive algorithms
,
interactive
,
number theory
2600
x511
1227G
Not Same
constructive algorithms
2600
x468
1267I
Intriguing Selection
brute force
,
constructive algorithms
,
implementation
,
interactive
,
sortings
2600
x464
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x440
1067C
Knights
constructive algorithms
2600
x439
10E
Greedy Change
constructive algorithms
2600
x424
925D
Aztec Catacombs
constructive algorithms
2600
x378
1031E
Triple Flips
constructive algorithms
2600
x317
513D2
Constrained Tree
constructive algorithms
,
data structures
2600
x314
1081F
Tricky Interactor
constructive algorithms
,
implementation
,
interactive
2600
x291
36E
Two Paths
constructive algorithms
,
dsu
,
graphs
,
implementation
2600
x261
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x260
883B
Berland Army
constructive algorithms
,
graphs
,
greedy
2600
x239
91D
Grocer's Problem
constructive algorithms
,
graphs
,
greedy
2600
x214
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x211
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x183
1090F
How to Learn You Score
constructive algorithms
,
interactive
2600
x140
1070L
Odd Federalization
constructive algorithms
2600
x137
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x920
1364E
X-OR
bitmasks
,
constructive algorithms
,
divide and conquer
,
interactive
,
probabilities
2700
x688
1148F
Foo Fighters
bitmasks
,
constructive algorithms
2700
x593
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x592
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x542
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x520
1103C
Johnny Solving
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x502
1338D
Nested Rubber Bands
constructive algorithms
,
dfs and similar
,
dp
,
math
,
trees
2700
x493
339E
Three Swaps
constructive algorithms
,
dfs and similar
,
greedy
2700
x433
1025E
Colored Cubes
constructive algorithms
,
implementation
,
matrices
2700
x419
1491F
Magnets
binary search
,
constructive algorithms
,
interactive
2700
x417
578E
Walking!
constructive algorithms
,
greedy
2700
x400
1205D
Almost All
constructive algorithms
,
trees
2700
x393
778D
Parquet Re-laying
constructive algorithms
2700
x345
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x334
1461F
Mathematical Expression
constructive algorithms
,
dp
,
greedy
2700
x315
333C
Lucky Tickets
brute force
,
constructive algorithms
2700
x295
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x292
1120B
Once in a casino
constructive algorithms
,
greedy
,
implementation
,
math
2700
x292
901D
Weighting a Tree
constructive algorithms
,
dfs and similar
,
graphs
2700
x275
472F
Design Tutorial: Change the Goal
constructive algorithms
,
math
,
matrices
2700
x199
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x146
198D
Cube Snake
constructive algorithms
2700
x68
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x48
1375G
Tree Modification
brute force
,
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
trees
2800
x1043
286E
Ladies' Shop
constructive algorithms
,
fft
,
math
2800
x584
1404D
Game of Pairs
constructive algorithms
,
dfs and similar
,
interactive
,
math
,
number theory
2800
x509
1365G
Secure Password
bitmasks
,
combinatorics
,
constructive algorithms
,
interactive
,
math
2800
x500
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x437
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x382
1383D
Rearrange
brute force
,
constructive algorithms
,
graphs
,
greedy
,
sortings
2800
x368
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x334
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x319
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x282
1214H
Tiles Placement
constructive algorithms
,
dfs and similar
,
trees
2800
x255
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x254
1491G
Switch and Flip
constructive algorithms
,
graphs
,
math
2800
x251
819E
Mister B and Flight to the Moon
constructive algorithms
,
graphs
2800
x250
652F
Ants on a Circle
constructive algorithms
,
math
2800
x228
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x226
1012D
AB-Strings
constructive algorithms
,
strings
2800
x192
1379E
Inverse Genealogy
constructive algorithms
,
divide and conquer
,
dp
,
math
,
trees
2800
x190
1267D
DevOps Best Practices
constructive algorithms
2800
x136
74E
Shift It!
constructive algorithms
2800
x101
472E
Design Tutorial: Learn from a Game
constructive algorithms
,
implementation
2800
x100
48H
Black and White
constructive algorithms
2800
x94
1172D
Nauuo and Portals
constructive algorithms
2900
x294
512E
Fox And Polygon
constructive algorithms
,
divide and conquer
2900
x267
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x242
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x209
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x167
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x163
1452F
Divide Powers
constructive algorithms
,
greedy
2900
x161
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x139
331E1
Deja Vu
constructive algorithms
,
graphs
,
implementation
2900
x77
1019C
Sergey's problem
constructive algorithms
,
graphs
3000
x654
618F
Double Knapsack
constructive algorithms
,
two pointers
3000
x571
1290D
Coffee Varieties (hard version)
constructive algorithms
,
graphs
,
interactive
3000
x291
341E
Candies Game
constructive algorithms
,
greedy
3000
x251
798E
Mike and code of a permutation
constructive algorithms
,
data structures
,
graphs
,
sortings
3000
x234
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x212
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