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Codeforces Round (Div. 2)
3 days
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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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Status
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Custom test
Problems
#
Name
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6955
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2999
321A
Ciel and Robot
binary search
,
implementation
,
math
1700
x3577
320B
Ping-Pong (Easy Version)
dfs and similar
,
graphs
1500
x7131
320A
Magic Numbers
brute force
,
greedy
900
x34522
319E
Ping-Pong
data structures
3000
x635
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x621
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4850
319B
Psychos in a Line
data structures
,
implementation
1900
x4055
319A
Malek Dance Club
combinatorics
,
math
1600
x2769
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7427
318A
Even Odds
math
900
x108855
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x153
317D
Game with Powers
dp
,
games
2300
x987
317C
Balance
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2500
x491
317B
Ants
brute force
,
implementation
2000
x1590
317A
Perfect Pair
brute force
1600
x4558
316G3
Good Substrings
string suffix structures
2400
x489
316G2
Good Substrings
string suffix structures
2200
x467
316G1
Good Substrings
hashing
,
strings
1700
x935
316F3
Suns and Rays
constructive algorithms
,
dfs and similar
,
implementation
2200
x164
316F2
Suns and Rays
2300
x150
316F1
Suns and Rays
dfs and similar
,
implementation
2200
x165
316E3
Summer Homework
data structures
,
math
2300
x509
316E2
Summer Homework
data structures
,
math
2300
x384
316E1
Summer Homework
brute force
,
data structures
1500
x1455
316D3
PE Lesson
dp
,
math
2400
x557
316D2
PE Lesson
dp
2300
x439
316D1
PE Lesson
brute force
,
dp
2300
x499
316C2
Tidying Up
flows
,
graph matchings
2300
x620
316C1
Tidying Up
flows
2200
x550
316B2
EKG
dfs and similar
,
dp
1600
x1573
316B1
EKG
brute force
,
dfs and similar
1500
x1364
316A2
Special Task
math
1400
x2114
316A1
Special Task
greedy
1100
x2611
315B
Sereja and Array
implementation
1200
x6907
315A
Sereja and Bottles
brute force
1400
x10851
314E
Sereja and Squares
dp
2900
x366
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x518
314C
Sereja and Subsequences
data structures
,
dp
2000
x1813
314B
Sereja and Periods
binary search
,
dfs and similar
,
strings
2000
x1457
314A
Sereja and Contest
implementation
1600
x2062
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x542
313D
Ilya and Roads
dp
2100
x1444
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5565
313B
Ilya and Queries
dp
,
implementation
1100
x42345
313A
Ilya and Bank Account
implementation
,
number theory
900
x54583
312B
Archer
math
,
probabilities
1300
x11246
312A
Whose sentence is it?
implementation
,
strings
1100
x4922
311E
Biologist
flows
2300
x1078
311D
Interval Cubing
data structures
,
math
2600
x660
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x477
311B
Cats Transport
data structures
,
dp
2400
x3296
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x4009
309E
Sheep
binary search
,
greedy
2900
x220
309D
Tennis Rackets
brute force
,
geometry
2700
x173
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1297
309B
Context Advertising
dp
,
two pointers
2100
x564
309A
Morning run
binary search
,
math
,
two pointers
2000
x461
306D
Polygon
constructive algorithms
,
geometry
2300
x266
306C
White, Black and White Again
combinatorics
,
number theory
2100
x464
306B
Optimizer
data structures
,
greedy
,
sortings
2100
x439
306A
Candies
implementation
800
x6645
305E
Playing with String
games
2300
x609
305D
Olya and Graph
combinatorics
,
math
2200
x456
305C
Ivan and Powers of Two
greedy
,
implementation
1600
x2428
305B
Continued Fractions
brute force
,
implementation
,
math
1700
x2045
305A
Strange Addition
brute force
,
constructive algorithms
,
implementation
1600
x4675
304B
Calendar
brute force
,
implementation
1300
x2948
304A
Pythagorean Theorem II
brute force
,
math
1200
x10280
303E
Random Ranking
dp
,
math
,
probabilities
3000
x315
303D
Rotatable Number
math
,
number theory
2600
x291
303C
Minimum Modular
brute force
,
graphs
,
math
,
number theory
2400
x866
303B
Rectangle Puzzle II
implementation
,
math
1700
x1335
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7770
302B
Eugeny and Play List
binary search
,
implementation
,
two pointers
1200
x7879
302A
Eugeny and Array
implementation
800
x8981
301E
Yaroslav and Arrangements
dp
2800
x364
301D
Yaroslav and Divisors
data structures
2200
x2239
301C
Yaroslav and Algorithm
constructive algorithms
2500
x461
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x2366
301A
Yaroslav and Sequence
constructive algorithms
1800
x3054
300E
Empire Strikes Back
binary search
,
math
,
number theory
2300
x1028
300D
Painting Square
dp
,
fft
2300
x742
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x9067
300B
Coach
brute force
,
dfs and similar
,
graphs
1500
x6183
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x22214
299B
Ksusha the Squirrel
brute force
,
implementation
900
x5197
299A
Ksusha and Array
brute force
,
number theory
,
sortings
1000
x7832
298B
Sail
brute force
,
greedy
,
implementation
1200
x13752
298A
Snow Footprints
greedy
,
implementation
1300
x10658
297E
Mystic Carvings
data structures
3000
x354
297D
Color the Carpet
constructive algorithms
2500
x499
297C
Splitting the Uniqueness
constructive algorithms
2400
x933
297B
Fish Weight
constructive algorithms
,
greedy
1600
x3458
297A
Parity Game
constructive algorithms
1700
x3599
296B
Yaroslav and Two Strings
combinatorics
,
dp
2000
x2139
296A
Yaroslav and Permutations
greedy
,
math
1100
x22393
295E
Yaroslav and Points
data structures
2500
x656
295D
Greg and Caves
combinatorics
,
dp
2400
x640
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