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Custom test
Problems
#
Name
9A
Die Roll
math
,
probabilities
800
x52831
1454A
Special Permutation
constructive algorithms
,
probabilities
800
x39368
476B
Dreamoon and WiFi
bitmasks
,
brute force
,
combinatorics
,
dp
,
math
,
probabilities
1300
x29138
1788B
Sum of Two Numbers
constructive algorithms
,
greedy
,
implementation
,
math
,
probabilities
1100
x19300
1459A
Red-Blue Shuffle
math
,
probabilities
800
x16813
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15953
312B
Archer
math
,
probabilities
1300
x11086
1461C
Random Events
dp
,
math
,
probabilities
1500
x10867
453A
Little Pony and Expected Maximum
probabilities
1600
x9978
1743D
Problem with Random Tests
brute force
,
dp
,
greedy
,
probabilities
1700
x7327
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6807
1729E
Guess the Cycle Size
interactive
,
probabilities
1800
x6749
518D
Ilya and Escalator
combinatorics
,
dp
,
math
,
probabilities
1700
x6700
1279D
Santa's Bot
combinatorics
,
math
,
probabilities
1700
x5923
1713D
Tournament Countdown
constructive algorithms
,
greedy
,
interactive
,
number theory
,
probabilities
1800
x5479
621C
Wet Shark and Flowers
combinatorics
,
math
,
number theory
,
probabilities
1700
x5301
1543C
Need for Pink Slips
bitmasks
,
brute force
,
dfs and similar
,
implementation
,
math
,
probabilities
1900
x5189
540D
Bad Luck Island
dp
,
probabilities
1900
x5182
442B
Andrey and Problem
greedy
,
math
,
probabilities
1800
x4854
16E
Fish
bitmasks
,
dp
,
probabilities
1900
x4670
1824B1
LuoTianyi and the Floating Islands (Easy Version)
combinatorics
,
math
,
probabilities
,
trees
1800
x4347
1753C
Wish I Knew How to Sort
dp
,
math
,
probabilities
2000
x4180
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4086
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3556
280C
Game on Tree
implementation
,
math
,
probabilities
,
trees
2200
x3513
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3390
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3361
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3329
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3293
1925D
Good Trip
combinatorics
,
dp
,
math
,
probabilities
1900
x3258
1777D
Score of a Tree
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
math
,
probabilities
,
trees
1900
x3233
896C
Willem, Chtholly and Seniorious
data structures
,
probabilities
2600
x3167
1009E
Intercity Travelling
combinatorics
,
math
,
probabilities
2000
x2892
840D
Destiny
data structures
,
probabilities
2500
x2796
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2778
1114E
Arithmetic Progression
binary search
,
interactive
,
number theory
,
probabilities
2200
x2776
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2652
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2597
1778D
Flexible String Revisit
combinatorics
,
dp
,
math
,
probabilities
2100
x2570
1097D
Makoto and a Blackboard
dp
,
math
,
number theory
,
probabilities
2200
x2563
77B
Falling Anvils
math
,
probabilities
1800
x2552
935D
Fafa and Ancient Alphabet
math
,
probabilities
1900
x2521
1824B2
LuoTianyi and the Floating Islands (Hard Version)
combinatorics
,
dfs and similar
,
math
,
probabilities
,
trees
2300
x2500
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2495
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2470
952D
I'm Feeling Lucky!
probabilities
1800
x2392
1612E
Messages
brute force
,
dp
,
greedy
,
probabilities
,
sortings
2000
x2391
1305F
Kuroni and the Punishment
math
,
number theory
,
probabilities
2500
x2361
351B
Jeff and Furik
combinatorics
,
dp
,
probabilities
1900
x2288
1039B
Subway Pursuit
binary search
,
interactive
,
probabilities
2100
x2279
908D
New Year and Arbitrary Arrangement
dp
,
math
,
probabilities
2200
x2250
1840G1
In Search of Truth (Easy Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2200
x2240
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2206
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2148
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2093
1523D
Love-Hate
bitmasks
,
brute force
,
dp
,
probabilities
2400
x2085
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2056
1139D
Steps to One
dp
,
math
,
number theory
,
probabilities
2300
x1993
1525E
Assimilation IV
combinatorics
,
dp
,
math
,
probabilities
,
two pointers
2100
x1970
364D
Ghd
brute force
,
math
,
probabilities
2900
x1970
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1956
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x1906
30C
Shooting Gallery
dp
,
probabilities
1800
x1853
960E
Alternating Tree
combinatorics
,
dfs and similar
,
divide and conquer
,
dp
,
probabilities
,
trees
2300
x1824
24D
Broken robot
dp
,
math
,
probabilities
2400
x1804
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1756
1418E
Expected Damage
binary search
,
combinatorics
,
probabilities
2400
x1728
1042E
Vasya and Magic Matrix
dp
,
math
,
probabilities
2300
x1692
1918E
ace5 and Task Order
constructive algorithms
,
divide and conquer
,
implementation
,
interactive
,
probabilities
,
sortings
2200
x1566
1096F
Inversion Expectation
dp
,
math
,
probabilities
2300
x1564
1599C
Bubble Strike
combinatorics
,
math
,
probabilities
,
ternary search
2000
x1562
1746F
Kazaee
data structures
,
hashing
,
probabilities
2800
x1543
1523E
Crypto Lights
combinatorics
,
dp
,
math
,
probabilities
2600
x1534
513C
Second price auction
bitmasks
,
probabilities
2000
x1516
1874C
Jellyfish and EVA
dp
,
graphs
,
greedy
,
math
,
probabilities
2300
x1511
1773A
Amazing Trick
constructive algorithms
,
graph matchings
,
math
,
probabilities
1900
x1482
1743F
Intersection and Union
data structures
,
dp
,
matrices
,
probabilities
2300
x1418
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1408
452C
Magic Trick
combinatorics
,
math
,
probabilities
2100
x1395
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1374
261B
Maxim and Restaurant
dp
,
math
,
probabilities
1900
x1363
1623D
Robot Cleaner Revisit
implementation
,
math
,
probabilities
2300
x1352
1310D
Tourism
dp
,
graphs
,
probabilities
2300
x1332
1156F
Card Bag
dp
,
math
,
probabilities
2300
x1332
109B
Lucky Probability
brute force
,
probabilities
1900
x1323
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1319
1770E
Koxia and Tree
combinatorics
,
dfs and similar
,
dp
,
dsu
,
math
,
probabilities
,
trees
2400
x1300
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1290
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1280
54C
First Digit Law
dp
,
math
,
probabilities
2000
x1246
711E
ZS and The Birthday Paradox
math
,
number theory
,
probabilities
2300
x1244
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1214
870D
Something with XOR Queries
brute force
,
interactive
,
probabilities
2000
x1194
1556F
Sports Betting
bitmasks
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
2500
x1178
1264D1
Beautiful Bracket Sequence (easy version)
combinatorics
,
dp
,
probabilities
2600
x1173
1948F
Rare Coins
combinatorics
,
math
,
probabilities
2500
x1158
1254D
Tree Queries
data structures
,
probabilities
,
trees
2700
x1149
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1149
1151F
Sonya and Informatics
combinatorics
,
dp
,
matrices
,
probabilities
2300
x1144
1264C
Beautiful Mirrors with queries
data structures
,
probabilities
2400
x1123
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implementation
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