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Before contest
Kotlin Heroes: Practice 6
23:13:57
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
24:13:57
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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
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matrices
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probabilities
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Problems
#
Name
1428H
Rotary Laser Lock
binary search
,
interactive
3500
x26
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x26
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x37
1071E
Rain Protection
binary search
,
geometry
3500
x62
1178H
Stock Exchange
binary search
,
flows
,
graphs
3500
x63
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x74
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x165
1158E
Strange device
binary search
,
interactive
,
math
,
trees
3400
x61
1466I
The Riddle of the Sphinx
binary search
,
data structures
,
interactive
3400
x74
1098E
Fedya the Potter
binary search
,
implementation
,
math
,
number theory
3400
x105
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x68
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x83
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x116
713E
Sonya Partymaker
binary search
,
dp
3300
x146
607E
Cross Sum
binary search
,
geometry
3300
x182
768G
The Winds of Winter
binary search
,
data structures
3300
x186
576E
Painting Edges
binary search
,
data structures
3300
x423
772E
Verifying Kingdom
binary search
,
divide and conquer
,
interactive
,
trees
3200
x78
645G
Armistice Area Apportionment
binary search
,
geometry
3200
x88
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x104
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x112
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x118
1223G
Wooden Raft
binary search
,
math
,
number theory
3200
x131
1211H
Road Repair in Treeland
*special problem
,
binary search
,
dp
,
trees
3100
x27
925F
Parametric Circulation
binary search
,
flows
3100
x64
780H
Intranet of Buses
binary search
,
geometry
,
implementation
,
two pointers
3100
x92
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x97
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x141
855F
Nagini
binary search
,
data structures
3100
x164
164D
Minimum Diameter
binary search
,
brute force
3100
x179
1129E
Legendary Tree
binary search
,
interactive
,
trees
3100
x226
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x349
587D
Duff in Mafia
2-sat
,
binary search
3100
x380
185E
Soap Time! - 2
binary search
,
data structures
3000
x75
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x109
434E
Furukawa Nagisa's Tree
binary search
,
divide and conquer
,
sortings
,
trees
3000
x162
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x188
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x194
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x211
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x225
1007C
Guess two numbers
binary search
,
interactive
3000
x227
150E
Freezing with Style
binary search
,
data structures
,
divide and conquer
,
trees
3000
x345
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x401
309E
Sheep
binary search
,
greedy
2900
x97
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x120
815E
Karen and Neighborhood
binary search
,
constructive algorithms
,
implementation
2900
x167
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x247
232D
Fence
binary search
,
data structures
,
string suffix structures
2900
x309
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x339
623C
Electric Charges
binary search
,
dp
2900
x363
685C
Optimal Point
binary search
,
math
2900
x381
1285F
Classical?
binary search
,
combinatorics
,
number theory
2900
x530
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x661
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x95
11E
Forward, march!
binary search
,
dp
,
greedy
2800
x168
1109C
Sasha and a Patient Friend
binary search
,
data structures
,
implementation
2800
x181
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x192
1310C
Au Pont Rouge
binary search
,
dp
,
strings
2800
x228
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x317
1033E
Hidden Bipartite Graph
binary search
,
constructive algorithms
,
dfs and similar
,
graphs
,
interactive
2800
x319
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x355
639E
Bear and Paradox
binary search
,
greedy
,
math
,
sortings
2800
x399
1279F
New Year and Handle Change
binary search
,
dp
2800
x417
983E
NN country
binary search
,
data structures
,
trees
2800
x437
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x437
774F
Pens And Days Of Week
*special problem
,
binary search
,
number theory
2700
x79
1386A
Colors
*special problem
,
binary search
,
constructive algorithms
,
interactive
2700
x146
592E
BCPC
binary search
,
geometry
,
two pointers
2700
x164
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x192
1182F
Maximum Sine
binary search
,
data structures
,
number theory
2700
x207
1202F
You Are Given Some Letters...
binary search
,
implementation
,
math
2700
x226
1379F1
Chess Strikes Back (easy version)
binary search
,
data structures
2700
x247
1372F
Omkar and Modes
binary search
,
divide and conquer
,
interactive
2700
x256
721E
Road to Home
binary search
,
dp
2700
x259
961F
k-substrings
binary search
,
hashing
,
string suffix structures
2700
x326
1491F
Magnets
binary search
,
constructive algorithms
,
interactive
2700
x330
1358F
Tasty Cookie
binary search
,
constructive algorithms
,
greedy
,
implementation
2700
x334
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x342
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x402
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x423
1220F
Gardener Alex
binary search
,
data structures
2700
x451
444E
DZY Loves Planting
binary search
,
dsu
,
trees
2700
x470
1344D
Résumé Review
binary search
,
greedy
,
math
2700
x651
713D
Animals and Puzzle
binary search
,
data structures
2700
x689
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x871
374E
Inna and Babies
binary search
,
data structures
,
dsu
,
geometry
,
implementation
2600
x152
201E
Thoroughly Bureaucratic Organization
binary search
,
combinatorics
2600
x284
8D
Two Friends
binary search
,
geometry
2600
x398
1354G
Find a Gift
binary search
,
interactive
,
probabilities
2600
x412
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x474
875E
Delivery Club
binary search
,
data structures
,
dp
2600
x530
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x538
1469F
Power Sockets
binary search
,
data structures
,
greedy
2600
x546
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x555
372D
Choosing Subtree is Fun
binary search
,
data structures
,
dfs and similar
,
trees
,
two pointers
2600
x571
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x604
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x864
1439C
Greedy Shopping
binary search
,
data structures
,
divide and conquer
,
greedy
,
implementation
2600
x1024
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x218
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x229
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