Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 973 (Div. 2)
19:24:22
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
math
combine-tags-by-or
*combine tags by OR
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1305E
Kuroni and the Score Distribution
constructive algorithms
,
greedy
,
implementation
,
math
2200
x3095
1305C
Kuroni and Impossible Calculation
brute force
,
combinatorics
,
math
,
number theory
1600
x14512
1304A
Two Rabbits
math
800
x25408
1303B
National Project
math
1400
x15721
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9334
1300A
Non-zero
implementation
,
math
800
x20968
1299E
So Mean
interactive
,
math
3400
x163
1299D
Around the World
bitmasks
,
combinatorics
,
dfs and similar
,
dp
,
graphs
,
graphs
,
math
,
trees
3000
x439
1299A
Anu Has a Function
brute force
,
greedy
,
math
1500
x12014
1297G
M-numbers
*special problem
,
dp
,
math
x70
1296B
Food Buying
math
900
x30128
1296A
Array with Odd Sum
math
800
x41547
1295D
Same GCDs
math
,
number theory
1800
x8861
1295B
Infinite Prefixes
math
,
strings
1700
x9303
1294E
Obtain a Permutation
greedy
,
implementation
,
math
1900
x4913
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11707
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x34541
1294A
Collecting Coins
math
800
x46607
1293B
JOE is on TV!
combinatorics
,
greedy
,
math
1000
x21177
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x332
1292D
Chaotic V.
dp
,
graphs
,
greedy
,
math
,
number theory
,
trees
2700
x810
1291A
Even But Not Even
greedy
,
math
,
strings
900
x19537
1288B
Yet Another Meme Problem
math
1100
x17037
1288A
Deadline
binary search
,
brute force
,
math
,
ternary search
1100
x18244
1286F
Harry The Potter
brute force
,
constructive algorithms
,
dp
,
fft
,
implementation
,
math
3100
x243
1286D
LCC
data structures
,
math
,
matrices
,
probabilities
3100
x582
1286C2
Madhouse (Hard version)
brute force
,
constructive algorithms
,
hashing
,
interactive
,
math
2800
x636
1286C1
Madhouse (Easy version)
brute force
,
constructive algorithms
,
interactive
,
math
2400
x1423
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x23319
1285A
Mezo Playing Zoma
math
800
x28038
1284F
New Year and Social Network
data structures
,
graph matchings
,
graphs
,
math
,
trees
3200
x317
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1299
1284C
New Year and Permutation
combinatorics
,
math
1600
x7998
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x13110
1283B
Candies Division
math
900
x21618
1283A
Minutes Before the New Year
math
800
x49478
1282A
Temporarily unavailable
implementation
,
math
900
x14765
1280F
Intergalactic Sliding Puzzle
combinatorics
,
constructive algorithms
,
math
3400
x61
1280E
Kirchhoff's Current Loss
math
2900
x200
1280B
Beingawesomeism
implementation
,
math
1800
x3928
1280A
Cut and Paste
implementation
,
math
1700
x5397
1279D
Santa's Bot
combinatorics
,
math
,
probabilities
1700
x6301
1279A
New Year Garland
math
900
x16899
1278F
Cards
combinatorics
,
dp
,
math
,
number theory
,
probabilities
2600
x1869
1278B
A and B
greedy
,
math
1500
x13254
1277D
Let's Play the Words?
data structures
,
hashing
,
implementation
,
math
1900
x3116
1276C
Beautiful Rectangle
brute force
,
combinatorics
,
constructive algorithms
,
data structures
,
greedy
,
math
2300
x1655
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20666
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3382
1271B
Blocks
greedy
,
math
1300
x11329
1271A
Suits
brute force
,
greedy
,
math
800
x14941
1270I
Xor on Figures
constructive algorithms
,
fft
,
math
3500
x236
1270G
Subset with Zero Sum
constructive algorithms
,
dfs and similar
,
graphs
,
math
2700
x2224
1270F
Awesome Substrings
math
,
strings
2600
x1134
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x2371
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4672
1270C
Make Good
bitmasks
,
constructive algorithms
,
math
1400
x14077
1270B
Interesting Subarray
constructive algorithms
,
greedy
,
math
1200
x16352
1270A
Card Game
games
,
greedy
,
math
800
x16948
1269A
Equation
brute force
,
math
800
x21551
1268D
Invertation in Tournament
brute force
,
divide and conquer
,
graphs
,
math
3200
x505
1268B
Domino for Young
dp
,
greedy
,
math
2000
x5906
1267K
Key Storage
combinatorics
,
math
2100
x1908
1267J
Just Arrange the Icons
greedy
,
implementation
,
math
1800
x2808
1267G
Game Relics
math
,
probabilities
3000
x653
1266H
Red-Blue Graph
dp
,
graphs
,
math
,
matrices
,
meet-in-the-middle
3400
x104
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3623
1266C
Diverse Matrix
constructive algorithms
,
greedy
,
math
,
number theory
1400
x9685
1266B
Dice Tower
constructive algorithms
,
math
1000
x14983
1266A
Competitive Programmer
chinese remainder theorem
,
math
1000
x15746
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3642
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12568
1263C
Everyone is a Winner!
binary search
,
math
,
meet-in-the-middle
,
number theory
1400
x13687
1263A
Sweet Problem
math
1100
x16295
1261F
Xor-Set
bitmasks
,
divide and conquer
,
math
3100
x386
1260C
Infinite Fence
greedy
,
math
,
number theory
1700
x8229
1260B
Obtain Two Zeroes
binary search
,
math
1300
x15696
1260A
Heating
math
1000
x14659
1257G
Divisor Set
divide and conquer
,
fft
,
greedy
,
math
,
number theory
2600
x607
1257B
Magic Stick
math
1000
x20385
1257A
Two Rival Students
greedy
,
math
800
x20494
1256A
Payment Without Change
math
1000
x29333
1255A
Changing Volume
math
800
x17179
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1414
1254B2
Send Boxes to Alice (Hard Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
2100
x3161
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4642
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x14220
1252K
Addition Robot
data structures
,
math
,
matrices
2100
x1851
1250L
Divide The Students
binary search
,
greedy
,
math
1500
x4095
1250H
Happy Birthday
math
1500
x4048
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2605
1249C2
Good Numbers (hard version)
binary search
,
greedy
,
math
,
meet-in-the-middle
1500
x12600
1249B2
Books Exchange (hard version)
dfs and similar
,
dsu
,
math
1300
x16736
1249B1
Books Exchange (easy version)
dsu
,
math
1000
x20641
1249A
Yet Another Dividing into Teams
math
800
x22233
1248B
Grow The Tree
greedy
,
math
,
sortings
900
x16858
1248A
Integer Points
geometry
,
math
1000
x14094
1245A
Good ol' Numbers Coloring
math
,
number theory
1000
x14174
1244G
Running in Pairs
constructive algorithms
,
greedy
,
math
2400
x1349
1244C
The Football Season
brute force
,
math
,
number theory
2000
x7584
←
1
2
...
14
15
16
17
18
...
28
29
→
User lists
Name