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Codeforces Round 972 (Div. 2)
42:18:39
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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
1611A
Make Even
constructive algorithms
,
math
800
x31325
1608A
Find Array
constructive algorithms
,
math
800
x19011
1607A
Linear Keyboard
implementation
,
strings
800
x37226
1605A
A.M. Deviation
math
,
number theory
800
x20571
1604A
Era
greedy
800
x21408
1602A
Two Subsequences
implementation
800
x18948
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x23207
1594A
Consecutive Sum Riddle
math
800
x24369
1593A
Elections
math
800
x36533
1592A
Gamer Hemose
binary search
,
greedy
,
math
,
sortings
800
x22088
1585A
Life of a Flower
implementation
800
x17724
1584A
Mathematical Addition
math
800
x14861
1583A
Windblume Ode
math
,
number theory
800
x13710
1582A
Luntik and Concerts
math
800
x18483
1581A
CQXYM Count Permutations
combinatorics
,
math
,
number theory
800
x13394
1579A
Casimir's String Solitaire
math
,
strings
800
x38673
1574A
Regular Bracket Sequences
constructive algorithms
800
x21734
1573A
Countdown
greedy
800
x21118
1571A
Sequence of Comparisons
*special problem
800
x1290
1569A
Balanced Substring
implementation
800
x25504
1567A
Domino Disaster
implementation
,
strings
800
x30018
1566B
MIN-MEX Cut
bitmasks
,
constructive algorithms
,
dp
,
greedy
800
x19521
1566A
Median Maximization
binary search
,
greedy
,
math
800
x23179
1562A
The Miracle and the Sleeper
greedy
,
math
800
x25485
1561A
Simply Strange Sort
brute force
,
implementation
,
sortings
800
x16542
1560C
Infinity Table
implementation
,
math
800
x26537
1560B
Who's Opposite?
math
800
x35470
1560A
Dislike of Threes
implementation
800
x59181
1557A
Ezzat and Two Subsequences
brute force
,
math
,
sortings
800
x27866
1556A
A Variety of Operations
math
800
x18049
1554A
Cherry
greedy
800
x29185
1553A
Digits Sum
math
,
number theory
800
x30864
1552A
Subsequence Permutation
sortings
,
strings
800
x23761
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x29139
1551A
Polycarp and Coins
greedy
,
math
800
x50468
1550A
Find The Array
greedy
,
math
800
x28046
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x24283
1549A
Gregor and Cryptography
math
,
number theory
800
x32282
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x26337
1547A
Shortest Path with Obstacle
implementation
,
math
800
x30355
1546A
AquaMoon and Two Arrays
brute force
,
greedy
800
x18187
1542A
Odd Set
math
800
x44405
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x29339
1539B
Love Song
dp
,
implementation
,
strings
800
x24352
1538B
Friends and Candies
greedy
,
math
800
x31591
1538A
Stone Game
brute force
,
dp
,
greedy
800
x36651
1537A
Arithmetic Array
greedy
,
math
800
x37020
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20175
1535A
Fair Playoff
brute force
,
implementation
800
x48939
1534A
Colour the Flag
brute force
,
implementation
800
x12711
1530B
Putting Plates
constructive algorithms
,
implementation
800
x15767
1530A
Binary Decimal
greedy
,
math
800
x21030
1529A
Eshag Loves Big Arrays
constructive algorithms
,
greedy
,
math
800
x29700
1527A
And Then There Were K
bitmasks
800
x35334
1526A
Mean Inequality
constructive algorithms
,
sortings
800
x24118
1525A
Potion-making
math
,
number theory
800
x25320
1523A
Game of Life
implementation
800
x13473
1520B
Ordinary Numbers
brute force
,
math
,
number theory
800
x44157
1520A
Do Not Be Distracted!
brute force
,
implementation
800
x51390
1519B
The Cake Is a Lie
dp
,
math
800
x30710
1519A
Red and Blue Beans
math
800
x28699
1517A
Sum of 2050
greedy
,
math
800
x25461
1516A
Tit for Tat
greedy
800
x23348
1515A
Phoenix and Gold
constructive algorithms
,
greedy
,
math
800
x20198
1514A
Perfectly Imperfect Array
math
,
number theory
800
x24066
1513A
Array and Peaks
constructive algorithms
,
implementation
800
x19338
1512B
Almost Rectangle
implementation
800
x25323
1512A
Spy Detected!
brute force
,
implementation
800
x63333
1511A
Review Site
greedy
800
x27523
1509A
Average Height
constructive algorithms
800
x25955
1506A
Strange Table
math
800
x30557
1504A
Déjà Vu
constructive algorithms
,
strings
800
x21650
1501A
Alexey and Train
implementation
800
x11563
1499A
Domino on Windowsill
combinatorics
,
constructive algorithms
,
math
800
x21220
1498A
GCD Sum
brute force
,
math
800
x23123
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x24257
1493A
Anti-knapsack
constructive algorithms
,
greedy
800
x19272
1492A
Three swimmers
math
800
x22614
1491A
K-th Largest Value
brute force
,
greedy
,
implementation
800
x18201
1490A
Dense Array
greedy
,
math
800
x31098
1487A
Arena
implementation
,
sortings
800
x26486
1482A
Prison Break
math
800
x20378
1481A
Space Navigation
greedy
,
strings
800
x24894
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25800
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26390
1474A
Puzzle From the Future
greedy
800
x22411
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33551
1472B
Fair Division
dp
,
greedy
,
math
800
x49783
1472A
Cards for Friends
greedy
,
math
800
x41778
1468E
Four Segments
greedy
800
x8774
1466B
Last minute enhancements
dp
,
greedy
800
x22614
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22499
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x27048
1462A
Favorite Sequence
implementation
,
two pointers
800
x41428
1461A
String Generation
constructive algorithms
,
greedy
800
x18558
1459A
Red-Blue Shuffle
math
,
probabilities
800
x16979
1455A
Strange Functions
math
,
number theory
800
x26367
1454B
Unique Bid Auction
implementation
800
x28056
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x40386
1453A
Cancel the Trains
implementation
800
x22541
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