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# Problem Tags Rating Solved
1542-B Plus and Multiply
constructive algorithms math number theory
1500
1542-A Odd Set
math
800
1541-B Pleasant Pairs
brute force implementation math +1
1200
1541-A Pretty Permutations
constructive algorithms greedy implementation
800
1540-E Tasty Dishes
math matrices
3500
1540-D Inverse Inversions
binary search brute force data structures
3200
1540-C2 Converging Array (Hard Version)
dp math
2900
1540-C1 Converging Array (Easy Version)
dp math
2700
1540-B Tree Array
brute force combinatorics dp +4
2300
1540-A Great Graphs
constructive algorithms graphs greedy +2
1400
1539-F Strange Array
data structures greedy sortings
2600
1539-E Game with Cards
binary search constructive algorithms data structures +3
2500
1539-D PriceFixed
binary search greedy implementation +2
1600
1539-C Stable Groups
greedy sortings
1200
1539-B Love Song
dp implementation strings
800
1539-A Contest Start
combinatorics geometry greedy +1
1000
1538-G Gift Set
binary search greedy math +1
2100
1538-F Interesting Function
binary search dp math +1
1500
1538-E Funny Substrings
data structures hashing implementation +2
2100
1538-D Another Problem About Dividing Numbers
constructive algorithms math number theory
1700
1538-C Number of Pairs
binary search data structures math +1
1300
1538-B Friends and Candies
greedy math
800
1538-A Stone Game
brute force dp greedy
800
1537-F Figure Fixing
constructive algorithms dfs and similar dsu +3
2200
1537-E2 Erase and Extend (Hard Version)
binary search data structures greedy +4
2200
1537-E1 Erase and Extend (Easy Version)
binary search brute force dp +6
1600
1537-D Deleting Divisors
games math number theory
1700
1537-C Challenging Cliffs
constructive algorithms greedy implementation +1
1200
1537-B Bad Boy
constructive algorithms greedy math
900
1537-A Arithmetic Array
greedy math
800
1536-F Omkar and Akmar
chinese remainder theorem combinatorics constructive algorithms +6
2600
1536-E Omkar and Forest
combinatorics graphs math +1
2300
1536-D Omkar and Medians
data structures greedy implementation
2000
1536-C Diluc and Kaeya
data structures dp hashing +1
1500
1536-B Prinzessin der Verurteilung
brute force constructive algorithms strings
1200
1536-A Omkar and Bad Story
brute force constructive algorithms
800
1535-F String Distance
binary search brute force data structures +3
3000
1535-E Gold Transfer
binary search data structures dp +3
2200
1535-D Playoff Tournament
data structures dfs and similar dp +2
1800
1535-C Unstable String
binary search dp greedy +3
1400
1535-B Array Reodering
brute force greedy math +2
900
1535-A Fair Playoff
brute force implementation
800
1534-H Lost Nodes
constructive algorithms dp graphs +3
3500
1534-G A New Beginning
data structures dp geometry +1
3300
1534-F2 Falling Sand (Hard Version)
dfs and similar dp graphs +1
3000
1534-F1 Falling Sand (Easy Version)
dfs and similar graphs greedy
2500
1534-E Lost Array
graphs greedy interactive +1
2300
1534-D Lost Tree
constructive algorithms interactive trees
1800
1534-C Little Alawn's Puzzle
combinatorics dp dsu +2
1300
1534-B Histogram Ugliness
greedy implementation math
1100