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Before contest
Codeforces Round 951 (Div. 2)
26:51:08
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Difficulty:
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greedy
combine-tags-by-or
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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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Custom test
Problems
#
Name
416D
Population Size
greedy
,
implementation
,
math
2400
x907
416C
Booking System
binary search
,
dp
,
greedy
,
implementation
1600
x7681
416A
Guess a number!
greedy
,
implementation
,
two pointers
1400
x8687
415B
Mashmokh and Tokens
binary search
,
greedy
,
implementation
,
math
1500
x6133
414D
Mashmokh and Water Tanks
binary search
,
data structures
,
greedy
,
trees
,
two pointers
2300
x675
413C
Jeopardy!
greedy
,
math
1400
x2309
412B
Network Configuration
greedy
,
sortings
900
x5297
412A
Poster
greedy
,
implementation
900
x4322
405D
Toy Sum
greedy
,
implementation
,
math
1700
x3091
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x95434
404E
Maze 1D
binary search
,
greedy
,
implementation
2200
x563
402D
Upgrading Array
dp
,
greedy
,
math
,
number theory
1800
x2524
402A
Nuts
greedy
,
math
1100
x4522
401C
Team
constructive algorithms
,
greedy
,
implementation
1400
x19368
401B
Sereja and Contests
greedy
,
implementation
,
math
1200
x4391
394C
Dominoes
constructive algorithms
,
greedy
x512
391F2
Stock Trading
greedy
x105
391C2
The Tournament
greedy
x132
389B
Fox and Cross
greedy
,
implementation
1100
x6827
389A
Fox and Number Game
greedy
,
math
1000
x13880
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3106
388A
Fox and Box Accumulation
greedy
,
sortings
1400
x11367
387C
George and Number
greedy
,
implementation
1700
x2166
387B
George and Round
brute force
,
greedy
,
two pointers
1200
x11947
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9571
385A
Bear and Raspberry
brute force
,
greedy
,
implementation
1000
x16262
384B
Multitasking
greedy
,
implementation
,
sortings
,
two pointers
1500
x3496
383A
Milking cows
data structures
,
greedy
1600
x5216
382A
Ksenia and Pan Scales
greedy
,
implementation
1100
x11838
381B
Sereja and Stairs
greedy
,
implementation
,
sortings
1100
x6599
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x61171
379C
New Year Ratings Change
greedy
,
sortings
1400
x6502
377B
Preparing for the Contest
binary search
,
data structures
,
greedy
,
sortings
1900
x1978
374B
Inna and Nine
combinatorics
,
greedy
1500
x3239
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2847
372A
Counting Kangaroos is Fun
binary search
,
greedy
,
sortings
,
two pointers
1600
x12439
371E
Subway Innovation
greedy
,
math
,
two pointers
2000
x1213
371A
K-Periodic Array
greedy
,
implementation
,
math
1000
x5959
370E
Summer Reading
dp
,
greedy
2500
x232
370D
Broken Monitor
brute force
,
constructive algorithms
,
greedy
,
implementation
2100
x618
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1509
369A
Valera and Plates
greedy
,
implementation
900
x10834
367C
Sereja and the Arrangement of Numbers
graphs
,
greedy
,
sortings
2000
x1711
364B
Free Market
dp
,
greedy
2200
x1151
363D
Renting Bikes
binary search
,
greedy
1800
x3760
363C
Fixing Typos
greedy
,
implementation
1400
x13110
362D
Fools and Foolproof Roads
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x897
362A
Two Semiknights Meet
greedy
,
math
1500
x2634
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x678
360A
Levko and Array Recovery
greedy
,
implementation
1700
x2024
359A
Table
constructive algorithms
,
greedy
,
implementation
1000
x8401
358D
Dima and Hares
dp
,
greedy
1800
x3904
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1956
357A
Group of Students
brute force
,
greedy
,
implementation
1000
x6726
356D
Bags and Coins
bitmasks
,
constructive algorithms
,
dp
,
greedy
2700
x940
356C
Compartments
combinatorics
,
constructive algorithms
,
greedy
,
implementation
2100
x1231
355B
Vasya and Public Transport
greedy
,
implementation
1100
x4438
354A
Vasya and Robot
brute force
,
greedy
,
math
1500
x5403
353E
Antichain
dp
,
graph matchings
,
greedy
2200
x570
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2198
351E
Jeff and Permutation
greedy
2200
x1514
351A
Jeff and Rounding
dp
,
greedy
,
implementation
,
math
1800
x2732
350C
Bombs
greedy
,
implementation
,
sortings
1600
x6472
350A
TL
brute force
,
greedy
,
implementation
1200
x16031
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13553
349A
Cinema Line
greedy
,
implementation
1100
x28904
346C
Number Transformation II
greedy
,
math
2200
x1420
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x691
343C
Read Time
binary search
,
greedy
,
two pointers
1900
x2910
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13151
342B
Xenia and Spies
brute force
,
greedy
,
implementation
1500
x3987
342A
Xenia and Divisors
greedy
,
implementation
1200
x12179
341E
Candies Game
constructive algorithms
,
greedy
3000
x436
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
x8167
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x200709
337C
Quiz
binary search
,
greedy
,
math
,
matrices
,
number theory
1600
x4808
337B
Routine Problem
greedy
,
math
,
number theory
1400
x9131
337A
Puzzles
greedy
900
x76158
336C
Vasily the Bear and Sequence
brute force
,
greedy
,
implementation
,
number theory
1800
x2379
335F
Buy One, Get One Free
dp
,
greedy
3000
x481
335A
Banana
binary search
,
constructive algorithms
,
greedy
1400
x2519
333B
Chips
greedy
1800
x2605
333A
Secrets
greedy
1600
x3939
332E
Binary Key
dp
,
greedy
,
implementation
2400
x298
332C
Students' Revenge
data structures
,
greedy
,
sortings
2200
x896
329A
Purification
constructive algorithms
,
greedy
1500
x4599
328B
Sheldon and Ice Pieces
greedy
1500
x1268
325E
The Red Button
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
greedy
2800
x755
322A
Ciel and Dancing
greedy
1000
x8103
321D
Ciel and Flipboard
dp
,
greedy
,
math
2900
x528
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6860
321B
Ciel and Duel
dp
,
flows
,
greedy
1900
x2975
320A
Magic Numbers
brute force
,
greedy
900
x34001
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x616
316A1
Special Task
greedy
1100
x2598
313E
Ilya and Two Numbers
constructive algorithms
,
data structures
,
dsu
,
greedy
2300
x542
313C
Ilya and Matrix
constructive algorithms
,
greedy
,
implementation
,
sortings
1400
x5535
309E
Sheep
binary search
,
greedy
2900
x219
309C
Memory for Arrays
binary search
,
bitmasks
,
greedy
1900
x1294
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