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Codeforces Round 937 (Div. 4)
03:16:42
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graphs
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
#
Name
1473E
Minimum Path
graphs
,
shortest paths
2400
x3254
1198C
Matching vs Independent Set
constructive algorithms
,
graphs
,
greedy
,
sortings
2000
x3230
550D
Regular Bridge
constructive algorithms
,
graphs
,
implementation
1900
x3227
1787D
Game on Axis
combinatorics
,
dfs and similar
,
dsu
,
graphs
,
implementation
1900
x3223
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3221
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3215
263D
Cycle in Graph
dfs and similar
,
graphs
1800
x3204
23B
Party
constructive algorithms
,
graphs
,
math
1600
x3171
1776F
Train Splitting
constructive algorithms
,
graphs
,
greedy
1700
x3165
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3145
643B
Bear and Two Paths
constructive algorithms
,
graphs
1600
x3131
1068C
Colored Rooks
constructive algorithms
,
graphs
1700
x3099
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3075
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3074
350B
Resort
graphs
1500
x3048
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3047
59E
Shortest Path
graphs
,
shortest paths
2000
x3043
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3021
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3019
1327D
Infinite Path
brute force
,
dfs and similar
,
graphs
,
math
,
number theory
2200
x3006
1131D
Gourmet choice
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2000
x2995
508D
Tanya and Password
dfs and similar
,
graphs
2500
x2994
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x2945
1666L
Labyrinth
dfs and similar
,
graphs
1800
x2939
1133F2
Spanning Tree with One Fixed Degree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
1900
x2935
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x2934
1672F1
Array Shuffling
constructive algorithms
,
graphs
,
greedy
2000
x2927
1810E
Monsters
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
2100
x2920
22C
System Administrator
graphs
1700
x2891
1923E
Count Paths
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
,
trees
2000
x2872
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2833
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2828
1866C
Completely Searching for Inversions
dfs and similar
,
dp
,
graphs
1900
x2805
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2800
1725M
Moving Both Hands
dp
,
graphs
,
shortest paths
1800
x2786
1466F
Euclid's nightmare
bitmasks
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
2100
x2784
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2783
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2768
1029E
Tree with Small Distances
dp
,
graphs
,
greedy
2100
x2736
1547G
How Many Paths?
dfs and similar
,
dp
,
graphs
,
trees
2100
x2733
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2678
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2667
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2641
960F
Pathwalks
data structures
,
dp
,
graphs
2100
x2636
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2636
1037E
Trips
graphs
2200
x2633
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2624
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2618
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x2594
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x2591
1887B
Time Travel
binary search
,
graphs
,
shortest paths
1900
x2584
1334E
Divisor Paths
combinatorics
,
graphs
,
greedy
,
math
,
number theory
2200
x2580
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2577
436C
Dungeons and Candies
dsu
,
graphs
,
greedy
,
trees
1800
x2574
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2569
1863E
Speedrun
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
2100
x2560
117C
Cycle
dfs and similar
,
graphs
2000
x2536
1108F
MST Unification
binary search
,
dsu
,
graphs
,
greedy
2100
x2532
1941G
Rudolf and Subway
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2000
x2531
1220E
Tourism
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
,
trees
2200
x2526
1559D2
Mocha and Diana (Hard Version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
trees
,
two pointers
2500
x2505
770C
Online Courses In BSU
*special problem
,
dfs and similar
,
graphs
,
implementation
1500
x2502
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2502
1214E
Petya and Construction Set
constructive algorithms
,
graphs
,
math
,
sortings
,
trees
2000
x2489
1495C
Garden of the Sun
constructive algorithms
,
graphs
2300
x2488
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x2487
1540B
Tree Array
brute force
,
combinatorics
,
dp
,
graphs
,
math
,
probabilities
,
trees
2300
x2469
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2427
1280C
Jeremy Bearimy
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2422
232A
Cycles
binary search
,
constructive algorithms
,
graphs
,
greedy
1600
x2412
1003E
Tree Constructing
constructive algorithms
,
graphs
2100
x2411
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2407
1693C
Keshi in Search of AmShZ
graphs
,
greedy
,
shortest paths
2300
x2400
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2399
863C
1-2-3
graphs
,
implementation
1800
x2385
547D
Mike and Fish
constructive algorithms
,
dfs and similar
,
graphs
2600
x2379
1674G
Remove Directed Edges
dfs and similar
,
dp
,
graphs
2000
x2347
27D
Ring Road 2
2-sat
,
dfs and similar
,
dsu
,
graphs
2200
x2346
1537F
Figure Fixing
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
2200
x2344
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2342
160D
Edges in MST
dfs and similar
,
dsu
,
graphs
,
sortings
2300
x2333
1536E
Omkar and Forest
combinatorics
,
graphs
,
math
,
shortest paths
2300
x2323
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2314
1650G
Counting Shortcuts
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2301
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2298
653D
Delivery Bears
binary search
,
flows
,
graphs
2200
x2298
228E
The Road to Berland is Paved With Good Intentions
2-sat
,
dfs and similar
,
dsu
,
graphs
1900
x2294
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2290
1213F
Unstable String Sort
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
2100
x2289
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2279
780E
Underground Lab
constructive algorithms
,
dfs and similar
,
graphs
2100
x2279
1100E
Andrew and Taxi
binary search
,
dfs and similar
,
graphs
2200
x2272
788B
Weird journey
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2100
x2268
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x2244
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2233
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2229
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2227
1498D
Bananas in a Microwave
dfs and similar
,
dp
,
graphs
,
implementation
2200
x2225
891C
Envy
data structures
,
dsu
,
graphs
2300
x2197
1704E
Count Seconds
brute force
,
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
2200
x2196
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