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# Problem Tags Rating Solved
1808-A Lucky Numbers
brute force implementation
900
1807-G2 Subsequence Addition (Hard Version)
bitmasks dp greedy +2
1100
1807-G1 Subsequence Addition (Easy Version)
brute force data structures dp +3
1100
1807-F Bouncy Ball
brute force dfs and similar implementation
1700
1807-E Interview
binary search implementation interactive
1300
1807-D Odd Queries
data structures implementation
900
1807-C Find and Replace
greedy implementation strings
800
1807-B Grab the Candies
greedy
800
1807-A Plus or Minus
implementation
800
1806-F2 GCD Master (hard version)
greedy math sortings
2900
1806-F1 GCD Master (easy version)
greedy math number theory +1
2900
1806-E Tree Master
brute force data structures dfs and similar +1
2200
1806-D DSU Master
combinatorics dp dsu +1
2500
1806-C Sequence Master
brute force constructive algorithms math
1600
1806-B Mex Master
constructive algorithms greedy
900
1806-A Walking Master
geometry greedy math
800
1805-F2 Survival of the Weakest (hard version)
greedy math sortings +1
3100
1805-F1 Survival of the Weakest (easy version)
binary search brute force implementation +2
2600
1805-E There Should Be a Lot of Maximums
brute force data structures dfs and similar +3
2300
1805-D A Wide, Wide Graph
dfs and similar dp graphs +2
1800
1805-C Place for a Selfie
binary search data structures geometry +1
1400
1805-B The String Has a Target
greedy strings
800
1805-A We Need the Zero
bitmasks brute force
800
1804-H Code Lock
bitmasks dp
3300
1804-G Flow Control
data structures dsu implementation
3500
1804-F Approximate Diameter
binary search divide and conquer graphs +1
2700
1804-E Routing
bitmasks brute force dfs and similar +2
2400
1804-D Accommodation
brute force dp greedy +1
2000
1804-C Pull Your Luck
brute force greedy math +1
1500
1804-B Vaccination
greedy implementation
1000
1804-A Lame King
greedy math
800
1802-B Settlement of Guinea Pigs
greedy implementation math
1000
1802-A Likes
greedy implementation
800
1801-G A task for substrings
data structures string suffix structures strings
3400
1801-F Another n-dimensional chocolate bar
dp math meet-in-the-middle +1
2700
1801-E Gasoline prices
data structures divide and conquer dsu +2
3000
1801-D The way home
binary search data structures dp +4
2100
1801-C Music Festival
binary search data structures dp +2
1900
1801-B Buying gifts
data structures greedy sortings
1800
1801-A The Very Beautiful Blanket
bitmasks constructive algorithms
1600
1800-G Symmetree
dfs and similar hashing implementation +1
2200
1800-F Dasha and Nightmares
bitmasks hashing meet-in-the-middle +1
1900
1800-E2 Unforgivable Curse (hard version)
brute force constructive algorithms dfs and similar +4
1500
1800-E1 Unforgivable Curse (easy version)
brute force constructive algorithms dsu +3
1400
1800-D Remove Two Letters
data structures greedy hashing +1
1200
1800-C2 Powering the Hero (hard version)
data structures greedy
1100
1800-C1 Powering the Hero (easy version)
data structures greedy
1000
1800-B Count the Number of Pairs
greedy strings
1000
1800-A Is It a Cat?
implementation strings
800
1799-H Tree Cutting
bitmasks dfs and similar dp
3200