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Problems
#
Name
55D
Beautiful numbers
dp
,
number theory
2500
x3612
868F
Yet Another Minimization Problem
divide and conquer
,
dp
2500
x3428
508D
Tanya and Password
dfs and similar
,
graphs
2500
x3097
840D
Destiny
data structures
,
probabilities
2500
x2793
1375E
Inversion SwapSort
constructive algorithms
,
greedy
,
sortings
2500
x2774
911G
Mass Change Queries
data structures
2500
x2625
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2537
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2361
468C
Hack it!
binary search
,
constructive algorithms
,
math
2500
x2252
449C
Jzzhu and Apples
constructive algorithms
,
number theory
2500
x2197
986C
AND Graph
bitmasks
,
dfs and similar
,
dsu
,
graphs
2500
x2195
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2190
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2167
1100F
Ivan and Burgers
data structures
,
divide and conquer
,
greedy
,
math
2500
x2125
348C
Subset Sums
brute force
,
data structures
2500
x2097
1527E
Partition Game
binary search
,
data structures
,
divide and conquer
,
dp
2500
x2094
528D
Fuzzy Search
bitmasks
,
brute force
,
fft
2500
x2070
1481E
Sorting Books
data structures
,
dp
,
greedy
2500
x2001
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1952
1368E
Ski Accidents
constructive algorithms
,
graphs
,
greedy
2500
x1941
1209E2
Rotate Columns (hard version)
bitmasks
,
dp
,
greedy
,
sortings
2500
x1853
1521D
Nastia Plays with a Tree
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
2500
x1809
963D
Frequency of String
hashing
,
string suffix structures
,
strings
2500
x1809
1572B
Xor of 3
brute force
,
constructive algorithms
,
greedy
,
two pointers
2500
x1748
1548C
The Three Little Pigs
combinatorics
,
dp
,
fft
,
math
2500
x1737
1325F
Ehab's Last Theorem
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x1736
1188C
Array Beauty
dp
2500
x1707
1637F
Towers
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
2500
x1695
1859E
Maximum Monogonosity
brute force
,
dp
,
math
2500
x1673
551E
GukiZ and GukiZiana
binary search
,
data structures
,
implementation
2500
x1650
840C
On the Bench
combinatorics
,
dp
2500
x1647
997C
Sky Full of Stars
combinatorics
,
math
2500
x1637
442C
Artem and Array
data structures
,
greedy
2500
x1622
1327F
AND Segments
bitmasks
,
combinatorics
,
data structures
,
dp
,
two pointers
2500
x1607
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1605
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1584
348D
Turtles
dp
,
matrices
2500
x1574
1497E2
Square-free division (hard version)
data structures
,
dp
,
greedy
,
math
,
number theory
,
two pointers
2500
x1568
1175F
The Number of Subpermutations
brute force
,
data structures
,
divide and conquer
,
hashing
,
math
2500
x1566
704B
Ant Man
dp
,
graphs
,
greedy
2500
x1564
660F
Bear and Bowling 4
binary search
,
data structures
,
divide and conquer
,
geometry
,
ternary search
2500
x1521
594D
REQ
data structures
,
number theory
2500
x1515
1452E
Two Editorials
brute force
,
dp
,
greedy
,
sortings
,
two pointers
2500
x1486
1497D
Genius
bitmasks
,
dp
,
graphs
,
number theory
2500
x1484
156D
Clues
combinatorics
,
graphs
2500
x1476
1418G
Three Occurrences
data structures
,
divide and conquer
,
hashing
,
two pointers
2500
x1465
1444C
Team-Building
data structures
,
dfs and similar
,
dsu
,
graphs
2500
x1460
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1456
1550E
Stringforces
binary search
,
bitmasks
,
brute force
,
dp
,
strings
,
two pointers
2500
x1441
1665E
MinimizOR
bitmasks
,
brute force
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
two pointers
2500
x1428
1508C
Complete the MST
bitmasks
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
2500
x1425
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1407
739C
Alyona and towers
data structures
2500
x1407
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1391
1381C
Mastermind
constructive algorithms
,
graph matchings
,
greedy
,
implementation
,
sortings
,
two pointers
2500
x1390
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1389
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1387
1361C
Johnny and Megan's Necklace
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2500
x1385
1838E
Count Supersequences
combinatorics
,
dp
,
math
2500
x1376
1746E1
Joking (Easy Version)
binary search
,
constructive algorithms
,
interactive
,
ternary search
2500
x1366
23C
Oranges and Apples
constructive algorithms
,
sortings
2500
x1357
543C
Remembering Strings
bitmasks
,
dp
2500
x1356
1174E
Ehab and the Expected GCD Problem
combinatorics
,
dp
,
math
,
number theory
2500
x1351
1687C
Sanae and Giant Robot
binary search
,
brute force
,
data structures
,
dsu
,
greedy
,
sortings
2500
x1339
1467E
Distinctive Roots in a Tree
data structures
,
dfs and similar
,
dp
,
trees
2500
x1335
1562E
Rescue Niwen!
dp
,
greedy
,
string suffix structures
,
strings
2500
x1329
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1307
1474E
What Is It?
constructive algorithms
,
greedy
2500
x1298
1438E
Yurii Can Do Everything
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
two pointers
2500
x1292
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1279
1710C
XOR Triangle
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
2500
x1277
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1274
1917E
Construct Matrix
constructive algorithms
,
math
2500
x1272
1301E
Nanosoft
binary search
,
data structures
,
dp
,
implementation
2500
x1271
992E
Nastya and King-Shamans
binary search
,
data structures
2500
x1268
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1267
1427E
Xum
bitmasks
,
constructive algorithms
,
math
,
matrices
,
number theory
2500
x1266
1120D
Power Tree
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2500
x1265
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1257
1479C
Continuous City
bitmasks
,
constructive algorithms
2500
x1256
1824C
LuoTianyi and XOR-Tree
data structures
,
dfs and similar
,
dp
,
dsu
,
greedy
,
trees
2500
x1255
1320D
Reachable Strings
data structures
,
hashing
,
strings
2500
x1253
1858E1
Rollbacks (Easy Version)
brute force
,
data structures
,
dfs and similar
,
trees
2500
x1251
875F
Royal Questions
dsu
,
graphs
,
greedy
2500
x1251
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1246
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1236
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1236
1583F
Defender of Childhood Dreams
bitmasks
,
constructive algorithms
,
divide and conquer
2500
x1223
1779F
Xorcerer's Stones
bitmasks
,
constructive algorithms
,
dp
,
trees
2500
x1222
813F
Bipartite Checking
data structures
,
dsu
,
graphs
2500
x1222
1485E
Move and Swap
dfs and similar
,
dp
,
greedy
,
trees
2500
x1215
1097F
Alex and a TV Show
bitmasks
,
combinatorics
,
number theory
2500
x1214
1513F
Swapping Problem
brute force
,
constructive algorithms
,
data structures
,
sortings
2500
x1201
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1199
1677D
Tokitsukaze and Permutations
dp
,
math
2500
x1194
1534F1
Falling Sand (Easy Version)
dfs and similar
,
graphs
,
greedy
2500
x1193
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1193
1712E2
LCM Sum (hard version)
brute force
,
data structures
,
math
,
number theory
,
two pointers
2500
x1183
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x1177
1922F
Replace on Segment
dp
,
graph matchings
2500
x1170
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37:55:30
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binary search
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brute force
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data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
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games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
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number theory
probabilities
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sortings
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strings
ternary search
trees
two pointers
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