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Codeforces Round 973 (Div. 2)
3 days
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2-sat
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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
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Problems
#
Name
1452C
Two Brackets
greedy
800
x19454
1452A
Robot Program
math
800
x22062
1451A
Subtract or Divide
greedy
,
math
800
x24174
1450A
Avoid Trygub
constructive algorithms
,
sortings
800
x17967
1447A
Add Candies
constructive algorithms
,
math
800
x13775
1445A
Array Rearrangment
greedy
,
sortings
800
x19090
1443A
Kids Seating
constructive algorithms
,
math
800
x16209
1440A
Buy the String
implementation
,
math
800
x19709
1438A
Specific Tastes of Andre
constructive algorithms
,
implementation
800
x19234
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17999
1436A
Reorder
math
800
x22648
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x28365
1433A
Boring Apartments
implementation
,
math
800
x52036
1431A
Selling Hamburgers
*special problem
800
x1859
1430B
Barrels
greedy
,
implementation
,
sortings
800
x19354
1428A
Box is Pull
math
800
x16295
1426A
Floor Number
implementation
,
math
800
x47699
1422A
Fence
geometry
,
math
800
x20861
1421A
XORwice
bitmasks
,
greedy
,
math
800
x28771
1417A
Copy-paste
greedy
,
math
800
x18221
1415A
Prison Break
brute force
,
math
800
x15148
1413A
Finding Sasuke
constructive algorithms
,
math
800
x14749
1411A
In-game Chat
implementation
800
x20581
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x65910
1408A
Circle Coloring
constructive algorithms
800
x12487
1405A
Permutation Forgery
constructive algorithms
800
x21431
1400A
String Similarity
constructive algorithms
,
strings
800
x26988
1399B
Gifts Fixing
greedy
800
x43389
1399A
Remove Smallest
greedy
,
sortings
800
x66069
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24528
1398A
Bad Triangle
geometry
,
math
800
x27488
1397A
Juggling Letters
greedy
,
strings
800
x28525
1393A
Rainbow Dash, Fluttershy and Chess Coloring
greedy
,
math
800
x20498
1392B
Omkar and Infinity Clock
implementation
,
math
800
x18468
1392A
Omkar and Password
greedy
,
math
800
x20569
1391B
Fix You
brute force
,
greedy
,
implementation
800
x27162
1391A
Suborrays
constructive algorithms
,
math
800
x24347
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x40976
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24893
1385B
Restore the Permutation by Merger
greedy
800
x37068
1385A
Three Pairwise Maximums
math
800
x38995
1382A
Common Subsequence
brute force
800
x26475
1374A
Required Remainder
math
800
x53470
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31883
1371A
Magical Sticks
math
800
x45865
1370A
Maximum GCD
greedy
,
implementation
,
math
,
number theory
800
x51697
1369A
FashionabLee
geometry
,
math
800
x36438
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x39029
1367B
Even Array
greedy
,
math
800
x53247
1367A
Short Substrings
implementation
,
strings
800
x57137
1360B
Honest Coach
greedy
,
sortings
800
x47730
1360A
Minimal Square
greedy
,
math
800
x50329
1358A
Park Lighting
greedy
,
math
800
x39295
1353B
Two Arrays And Swaps
greedy
,
sortings
800
x49358
1353A
Most Unstable Array
constructive algorithms
,
greedy
,
math
800
x40534
1352A
Sum of Round Numbers
implementation
,
math
800
x78688
1351A
A+B (Trial Problem)
implementation
800
x23712
1348A
Phoenix and Balance
greedy
,
math
800
x39374
1345A
Puzzle Pieces
math
800
x24148
1343B
Balanced Array
constructive algorithms
,
math
800
x56247
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x38084
1335A
Candies and Two Sisters
math
800
x83663
1328A
Divisibility Problem
math
800
x100336
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x35920
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x39845
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19737
1316A
Grade Allocation
implementation
800
x18645
1315A
Dead Pixel
implementation
800
x12058
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25876
1311A
Add Odd or Subtract Even
greedy
,
implementation
,
math
800
x41775
1307A
Cow and Haybales
greedy
,
implementation
800
x14943
1305A
Kuroni and the Gifts
brute force
,
constructive algorithms
,
greedy
,
sortings
800
x14030
1304A
Two Rabbits
math
800
x25404
1303A
Erasing Zeroes
implementation
,
strings
800
x32059
1301A
Three Strings
implementation
,
strings
800
x19350
1300A
Non-zero
implementation
,
math
800
x20967
1296A
Array with Odd Sum
math
800
x41526
1294A
Collecting Coins
math
800
x46581
1287A
Angry Students
greedy
,
implementation
800
x20561
1285A
Mezo Playing Zoma
math
800
x28030
1284A
New Year and Naming
implementation
,
strings
800
x17986
1283A
Minutes Before the New Year
math
800
x49431
1281A
Suffix Three
implementation
800
x17928
1271A
Suits
brute force
,
greedy
,
math
800
x14940
1270A
Card Game
games
,
greedy
,
math
800
x16948
1269A
Equation
brute force
,
math
800
x21547
1257A
Two Rival Students
greedy
,
math
800
x20491
1255A
Changing Volume
math
800
x17178
1250F
Data Center
brute force
,
implementation
800
x7261
1249A
Yet Another Dividing into Teams
math
800
x22232
1244A
Pens and Pencils
math
800
x19160
1243A
Maximum Square
implementation
800
x15630
1236A
Stones
brute force
,
greedy
,
math
800
x16268
1234A
Equalize Prices Again
math
800
x27794
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21481
1228A
Distinct Digits
brute force
,
implementation
800
x21635
1223A
CME
math
800
x21583
1220A
Cards
implementation
,
sortings
,
strings
800
x29617
1216A
Prefixes
strings
800
x18631
1209A
Paint the Numbers
greedy
,
implementation
,
math
800
x12186
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