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# Problem Tags Rating Solved
1218-A BubbleReactor
dp graphs
2800
1217-F Forced Online Queries Problem
data structures divide and conquer dsu +2
2600
1217-E Sum Queries?
data structures greedy implementation +1
2300
1217-D Coloring Edges
constructive algorithms dfs and similar graphs
2100
1217-C The Number Of Good Substrings
binary search bitmasks brute force
1700
1217-B Zmei Gorynich
greedy math
1600
1217-A Creating a Character
binary search math
1300
1216-F Wi-Fi
data structures dp greedy
2100
1216-E2 Numerical Sequence (hard version)
binary search math
2200
1216-E1 Numerical Sequence (easy version)
binary search brute force math
1900
1216-D Swords
math
1300
1216-C White Sheet
geometry math
1700
1216-B Shooting
greedy implementation sortings
900
1216-A Prefixes
strings
800
1215-F Radio Stations
2-sat
2700
1215-E Marbles
bitmasks dp
2200
1215-D Ticket Game
games greedy math
1700
1215-C Swap Letters
constructive algorithms greedy
1500
1215-B The Number of Products
combinatorics dp implementation
1400
1215-A Yellow Cards
greedy implementation math
1000
1214-H Tiles Placement
constructive algorithms dfs and similar trees
2800
1214-G Feeling Good
bitmasks data structures
3200
1214-F Employment
greedy sortings
2700
1214-E Petya and Construction Set
constructive algorithms graphs math +2
2000
1214-D Treasure Island
dfs and similar dp flows +1
1900
1214-C Bad Sequence
data structures greedy
1200
1214-B Badges
brute force math
1100
1214-A Optimal Currency Exchange
brute force math
1400
1213-G Path Queries
divide and conquer dsu graphs +2
1800
1213-F Unstable String Sort
data structures dfs and similar dsu +4
2100
1213-E Two Small Strings
brute force constructive algorithms
1900
1213-D2 Equalizing by Division (hard version)
brute force math sortings
1600
1213-D1 Equalizing by Division (easy version)
brute force implementation
1500
1213-C Book Reading
math
1200
1213-B Bad Prices
data structures implementation
1100
1213-A Chips Moving
math
900
1211-I Unusual Graph
*special graphs
3000
1211-H Road Repair in Treeland
*special binary search dp +1
3100
1211-G King's Path
*special math trees
2500
1211-F kotlinkotlinkotlinkotlin...
*special graphs implementation +1
2300
1211-E Double Permutation Inc.
*special binary search greedy
2000
1211-D Teams
*special binary search greedy +1
2000
1211-C Ice Cream
*special greedy sortings
1700
1211-B Traveling Around the Golden Ring of Berland
*special implementation
1500
1211-A Three Problems
*special implementation
1000
1210-G Mateusz and Escape Room
dp
3500
1210-F2 Marek and Matching (hard version)
brute force probabilities
3200
1210-F1 Marek and Matching (easy version)
brute force probabilities
3100
1210-E Wojtek and Card Tricks
math
2700
1210-D Konrad and Company Evaluation
graphs
2400