Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Codeforces Round 973 (Div. 2)
13:55:18
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
2010B
Three Brothers
brute force
,
implementation
,
math
800
x14864
2010A
Alternating Sum of Numbers
brute force
,
implementation
,
math
800
x12354
2009F
Firefly's Queries
bitmasks
,
data structures
,
flows
,
math
1700
x5366
2009E
Klee's SUPER DUPER LARGE Array!!!
binary search
,
math
,
ternary search
1400
x10894
2009D
Satyam and Counting
geometry
,
math
1400
x12034
2009C
The Legend of Freya the Frog
implementation
,
math
1100
x21680
2009A
Minimize!
brute force
,
math
800
x42381
2008H
Sakurako's Test
binary search
,
brute force
,
greedy
,
math
,
number theory
2100
x2362
2008G
Sakurako's Task
binary search
,
greedy
,
math
,
number theory
1800
x4224
2008F
Sakurako's Box
combinatorics
,
math
,
number theory
1400
x10940
2008D
Sakurako's Hobby
dp
,
dsu
,
graphs
,
math
1100
x17100
2008C
Longest Good Array
binary search
,
brute force
,
math
800
x26789
2008B
Square or Not
brute force
,
math
,
strings
800
x25617
2008A
Sakurako's Exam
brute force
,
constructive algorithms
,
greedy
,
math
800
x31052
2007C
Dora and C++
math
,
number theory
1500
x10500
2007A
Dora's Set
greedy
,
math
,
number theory
800
x20653
2006D
Iris and Adjacent Products
data structures
,
greedy
,
implementation
,
math
2600
x545
2006C
Eri and Expanded Sets
data structures
,
divide and conquer
,
math
,
number theory
,
two pointers
2300
x1378
2006B
Iris and the Tree
brute force
,
data structures
,
dfs and similar
,
dsu
,
math
,
trees
1800
x2741
2005B2
The Strict Teacher (Hard Version)
binary search
,
greedy
,
math
,
sortings
x14002
2005B1
The Strict Teacher (Easy Version)
greedy
,
math
,
sortings
x16079
2004F
Make a Palindrome
binary search
,
brute force
,
data structures
,
greedy
,
math
2600
x989
2004E
Not a Nim Problem
brute force
,
games
,
math
,
number theory
2100
x3694
2004A
Closest Point
implementation
,
math
800
x28436
2003F
Turtle and Three Sequences
brute force
,
data structures
,
dp
,
greedy
,
math
,
probabilities
,
two pointers
2800
x346
2003E2
Turtle and Inversions (Hard Version)
brute force
,
data structures
,
divide and conquer
,
dp
,
greedy
,
math
,
two pointers
2700
x451
2003E1
Turtle and Inversions (Easy Version)
brute force
,
divide and conquer
,
dp
,
greedy
,
math
2600
x638
2003D2
Turtle and a MEX Problem (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
,
implementation
,
math
2100
x3638
2003D1
Turtle and a MEX Problem (Easy Version)
greedy
,
math
1500
x10222
2002F2
Court Blue (Hard Version)
brute force
,
dp
,
math
,
number theory
2800
x389
2002F1
Court Blue (Easy Version)
brute force
,
dfs and similar
,
dp
,
math
,
number theory
2600
x763
2002C
Black Circles
brute force
,
geometry
,
greedy
,
math
1200
x13999
2002A
Distanced Coloring
constructive algorithms
,
implementation
,
math
800
x18521
2001E1
Deterministic Heap (Easy Version)
combinatorics
,
dp
,
math
,
trees
2400
x1119
2000F
Color Rows and Columns
dp
,
greedy
,
implementation
,
math
1900
x4908
2000E
Photoshoot for Gorillas
combinatorics
,
data structures
,
greedy
,
math
1400
x12303
2000A
Primary Task
implementation
,
math
,
strings
800
x35013
1999F
Expected Median
combinatorics
,
math
1500
x9536
1999E
Triple Operations
dp
,
implementation
,
math
1300
x17195
1999A
A+B Again?
implementation
,
math
800
x47530
1998B
Minimize Equal Sum Subarrays
constructive algorithms
,
math
,
number theory
1000
x22343
1998A
Find K Distinct Points with Fixed Center
constructive algorithms
,
implementation
,
math
800
x22978
1997F
Chips on a Line
brute force
,
combinatorics
,
dp
,
greedy
,
math
2700
x830
1996F
Bomb
binary search
,
greedy
,
math
1900
x4331
1996E
Decode
combinatorics
,
data structures
,
implementation
,
math
1600
x8921
1996D
Fun
binary search
,
brute force
,
combinatorics
,
math
,
number theory
1500
x14834
1996A
Legs
binary search
,
math
,
ternary search
800
x39819
1995C
Squaring
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
number theory
1800
x7876
1995B2
Bouquet (Hard Version)
binary search
,
data structures
,
greedy
,
math
,
sortings
,
two pointers
1700
x8279
1995A
Diagonals
brute force
,
greedy
,
implementation
,
math
800
x23448
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x490
1994G
Minecraft
bitmasks
,
brute force
,
dp
,
graphs
,
math
2600
x1154
1994E
Wooden Game
bitmasks
,
greedy
,
math
,
trees
2000
x4199
1994D
Funny Game
constructive algorithms
,
dsu
,
graphs
,
greedy
,
math
,
number theory
,
trees
1900
x5409
1994B
Fun Game
bitmasks
,
constructive algorithms
,
greedy
,
math
1100
x15867
1993F2
Dyn-scripted Robot (Hard Version)
chinese remainder theorem
,
math
,
number theory
2800
x359
1993F1
Dyn-scripted Robot (Easy Version)
brute force
,
chinese remainder theorem
,
constructive algorithms
,
math
,
number theory
2400
x913
1993C
Light Switches
implementation
,
math
1400
x12844
1992G
Ultra-Meow
combinatorics
,
dp
,
math
2000
x2894
1992E
Novice's Mistake
brute force
,
constructive algorithms
,
implementation
,
math
,
strings
1700
x8738
1992C
Gorilla and Permutation
constructive algorithms
,
math
900
x27928
1992B
Angry Monk
greedy
,
math
,
sortings
800
x32946
1992A
Only Pluses
brute force
,
constructive algorithms
,
greedy
,
math
,
sortings
800
x39322
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x256
1991F
Triangle Formation
brute force
,
greedy
,
implementation
,
math
,
sortings
2200
x2145
1991D
Prime XOR Coloring
bitmasks
,
constructive algorithms
,
graphs
,
greedy
,
math
,
number theory
1900
x6104
1991C
Absolute Zero
constructive algorithms
,
greedy
,
math
1300
x13605
1990C
Mad MAD Sum
brute force
,
greedy
,
math
1500
x10900
1989E
Distance to Different
combinatorics
,
dp
,
math
2300
x1841
1989D
Smithing Skill
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
,
two pointers
1900
x5667
1989C
Two Movies
greedy
,
math
1400
x17661
1988F
Heartbeat
combinatorics
,
dp
,
fft
,
math
3000
x180
1988A
Split the Multiset
brute force
,
greedy
,
implementation
,
math
900
x22085
1987A
Upload More RAM
greedy
,
math
800
x24339
1986G2
Permutation Problem (Hard Version)
brute force
,
data structures
,
hashing
,
math
,
number theory
2500
x1010
1986G1
Permutation Problem (Simple Version)
binary search
,
brute force
,
combinatorics
,
data structures
,
math
,
number theory
2200
x1398
1986E
Beautiful Array
greedy
,
math
,
number theory
,
sortings
1700
x8365
1986D
Mathematical Problem
brute force
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1400
x14672
1986A
X Axis
brute force
,
geometry
,
math
,
sortings
800
x38862
1985G
D-Function
combinatorics
,
math
,
number theory
1600
x8902
1985E
Secret Box
brute force
,
combinatorics
,
math
1200
x19290
1985D
Manhattan Circle
implementation
,
math
900
x33253
1985B
Maximum Multiple Sum
brute force
,
math
,
number theory
800
x44210
1984F
Reconstruction
brute force
,
dp
,
math
2500
x894
1984D
''a'' String Problem
brute force
,
hashing
,
implementation
,
math
,
string suffix structures
,
strings
2000
x3111
1984C2
Magnitude (Hard Version)
combinatorics
,
dp
,
greedy
,
math
1700
x7034
1984C1
Magnitude (Easy Version)
dp
,
greedy
,
math
1300
x15908
1984B
Large Addition
implementation
,
math
1100
x17703
1983E
I Love Balls
combinatorics
,
math
,
probabilities
2300
x1891
1983D
Swap Dilemma
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
math
,
sortings
1700
x7864
1983B
Corner Twist
constructive algorithms
,
greedy
,
implementation
,
math
1200
x15549
1983A
Array Divisibility
constructive algorithms
,
math
800
x24929
1982E
Number of k-good subarrays
bitmasks
,
brute force
,
combinatorics
,
divide and conquer
,
dp
,
math
,
meet-in-the-middle
2300
x1499
1982D
Beauty of the mountains
brute force
,
data structures
,
implementation
,
math
,
number theory
1700
x6819
1982B
Collatz Conjecture
brute force
,
implementation
,
math
,
number theory
1200
x16350
1982A
Soccer
greedy
,
implementation
,
math
,
sortings
800
x24259
1981C
Turtle and an Incomplete Sequence
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
1800
x5090
1981B
Turtle and an Infinite Sequence
bitmasks
,
math
1300
x13246
1981A
Turtle and Piggy Are Playing a Game
brute force
,
greedy
,
math
800
x21744
1980F2
Field Division (hard version)
math
,
sortings
2400
x943
←
1
2
3
...
28
29
→
User lists
Name