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ICPC Challenge
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Before contest
Codeforces Round 914 (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
geometry
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
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Problems
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Status
Standings
Custom test
Problems
#
Name
1906D
Spaceship Exploration
binary search
,
geometry
2800
x29
1901F
Landscaping
binary search
,
geometry
,
two pointers
2900
x92
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x13185
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x12530
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x361
1860F
Evaluate RBS
data structures
,
geometry
,
implementation
,
math
,
sortings
2900
x243
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x9666
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x18171
1846D
Rudolph and Christmas Tree
constructive algorithms
,
geometry
,
math
1200
x16856
1845B
Come Together
geometry
,
implementation
,
math
900
x19593
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1438
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x432
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x303
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3181
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16323
1812E
Not a Geometry Problem
*special problem
,
*special problem
,
constructive algorithms
,
geometry
,
math
x3513
1806A
Walking Master
geometry
,
greedy
,
math
800
x19937
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x11067
1799E
City Union
constructive algorithms
,
dfs and similar
,
dsu
,
geometry
,
greedy
,
implementation
,
math
2300
x1080
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x20197
1791B
Following Directions
geometry
,
implementation
800
x38840
1787H
Codeforces Scoreboard
binary search
,
data structures
,
dp
,
geometry
3300
x168
1781A
Parallel Projection
geometry
,
math
800
x14592
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x585
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1170
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x555
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x86
1740I
Arranging Crystal Balls
data structures
,
divide and conquer
,
divide and conquer
,
dp
,
geometry
,
graphs
,
number theory
3500
x93
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13290
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2301
1735F
Pebbles and Beads
data structures
,
geometry
2900
x182
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x10922
1726H
Mainak and the Bleeding Polygon
binary search
,
geometry
,
implementation
,
math
3500
x74
1725G
Garage
binary search
,
geometry
,
math
1500
x5217
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1453
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x480
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1496
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21240
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2277
1697E
Coloring
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
geometry
,
graphs
,
greedy
,
implementation
,
math
2400
x1100
1696G
Fishingprince Plays With Array Again
brute force
,
data structures
,
geometry
,
math
3300
x246
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x3856
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4771
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1336
1666G
Global Warming
geometry
,
math
3100
x127
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x2963
1662K
Pandemic Restrictions
geometry
,
ternary search
x269
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11099
1642A
Hard Way
geometry
800
x15626
1641F
Covering Circle
geometry
3500
x89
1628F
Spaceship Crisis Management
binary search
,
data structures
,
geometry
,
sortings
3500
x78
1627F
Not Splitting
geometry
,
graphs
,
greedy
,
implementation
,
shortest paths
2700
x539
1622A
Construct a Rectangle
geometry
,
math
800
x28617
1620B
Triangles on a Rectangle
geometry
,
greedy
,
math
1000
x18348
1616C
Representative Edges
brute force
,
geometry
,
implementation
,
math
1500
x11494
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x329
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8089
1584G
Eligible Segments
geometry
3200
x194
1578I
Interactive Rays
geometry
,
interactive
3300
x58
1578F
Framing Pictures
geometry
2900
x147
1575M
Managing Telephone Poles
data structures
,
geometry
2400
x221
1575B
Building an Amusement Park
binary search
,
geometry
2300
x437
1572E
Polygon
binary search
,
dp
,
geometry
3000
x252
1571H
Laser Beams
*special problem
,
geometry
,
probabilities
2900
x38
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5650
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9619
1548D2
Gregor and the Odd Cows (Hard)
brute force
,
geometry
,
math
,
number theory
3300
x232
1548D1
Gregor and the Odd Cows (Easy)
bitmasks
,
geometry
,
math
,
number theory
2300
x1396
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x19159
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x881
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x460
1519E
Off by One
constructive algorithms
,
dfs and similar
,
geometry
,
graphs
,
sortings
,
trees
2700
x761
1517H
Fly Around the World
dp
,
geometry
3500
x60
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x23158
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x477
1503F
Balance the Cards
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
3500
x117
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x16240
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x14645
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2135
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x465
1468G
Hobbits
binary search
,
geometry
2500
x775
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3462
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22059
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1388
1451D
Circle Game
games
,
geometry
,
math
1700
x9042
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14547
1446F
Line Distance
binary search
,
data structures
,
geometry
3200
x231
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x484
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x64
1423E
5G Antenna Towers
geometry
2700
x68
1422A
Fence
geometry
,
math
800
x20315
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x101
1401E
Divide Square
data structures
,
geometry
,
implementation
,
sortings
2400
x2092
1398A
Bad Triangle
geometry
,
math
800
x26547
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x878
1388E
Uncle Bogdan and Projections
data structures
,
geometry
,
sortings
2700
x380
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x110
1381E
Origami
geometry
,
math
,
sortings
3300
x93
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x73
1369A
FashionabLee
geometry
,
math
800
x34624
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