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# Problem Tags Rating Solved
1391-B Fix You
brute force greedy implementation
800
1391-A Suborrays
constructive algorithms math
800
1389-G Directing Edges
dfs and similar dp graphs +1
2800
1389-F Bicolored Segments
data structures dp graph matchings +1
2600
1389-E Calendar Ambiguity
math number theory
2200
1389-D Segment Intersections
brute force greedy implementation +1
2100
1389-C Good String
brute force dp greedy +1
1500
1389-B Array Walk
brute force dp greedy
1600
1389-A LCM Problem
constructive algorithms greedy math +1
800
1388-E Uncle Bogdan and Projections
data structures geometry sortings
2700
1388-D Captain Flint and Treasure
data structures dfs and similar graphs +3
2000
1388-C Uncle Bogdan and Country Happiness
dfs and similar greedy math +1
1800
1388-B Captain Flint and a Long Voyage
greedy math
1000
1388-A Captain Flint and Crew Recruitment
brute force greedy math +1
800
1387-C Viruses
*special dp shortest paths +1
2900
1387-B2 Village (Maximum)
*special dfs and similar trees
2500
1387-B1 Village (Minimum)
*special dp greedy +1
2100
1387-A Graph
*special binary search dfs and similar +3
2100
1386-C Joker
*special bitmasks data structures +2
2800
1386-B Mixture
*special data structures geometry +2
2900
1386-A Colors
*special binary search constructive algorithms +1
2700
1385-G Columns Swaps
2-sat dfs and similar dsu +2
2300
1385-F Removing Leaves
data structures greedy implementation +1
2300
1385-E Directing Edges
constructive algorithms dfs and similar graphs
2000
1385-D a-Good String
bitmasks brute force divide and conquer +2
1500
1385-C Make It Good
greedy
1200
1385-B Restore the Permutation by Merger
greedy
800
1385-A Three Pairwise Maximums
math
800
1384-B2 Koa and the Beach (Hard Version)
constructive algorithms dp greedy +1
2200
1384-B1 Koa and the Beach (Easy Version)
brute force dp greedy
1900
1384-A Common Prefixes
constructive algorithms greedy strings
1200
1383-F Special Edges
flows graphs
3200
1383-E Strange Operation
combinatorics data structures dp
2800
1383-D Rearrange
brute force constructive algorithms graphs +2
2800
1383-C String Transformation 2
bitmasks dp graphs +1
3100
1383-B GameGame
bitmasks constructive algorithms dp +3
1900
1383-A String Transformation 1
dsu graphs greedy +4
1700
1382-B Sequential Nim
dp games
1100
1382-A Common Subsequence
brute force
800
1381-E Origami
geometry math sortings
3300
1381-D The Majestic Brown Tree Snake
dfs and similar dp greedy +2
3000
1381-C Mastermind
constructive algorithms graph matchings greedy +3
2500
1381-B Unmerge
dp
1800
1381-A2 Prefix Flip (Hard Version)
constructive algorithms data structures implementation +2
1700
1381-A1 Prefix Flip (Easy Version)
constructive algorithms data structures strings
1300
1380-G Circular Dungeon
greedy math probabilities
2600
1380-F Strange Addition
data structures dp matrices
2600
1380-E Merging Towers
data structures dsu implementation +1
2300
1380-D Berserk And Fireball
constructive algorithms greedy implementation +2
2000
1380-C Create The Teams
brute force dp greedy +2
1400