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# Problem Tags Rating Solved
1675-C Detective Task
implementation
1100
1675-B Make It Increasing
greedy implementation
900
1675-A Food for Animals
greedy math
800
1674-G Remove Directed Edges
dfs and similar dp graphs
2000
1674-F Desktop Rearrangement
data structures greedy implementation
1800
1674-E Breaking the Wall
binary search brute force constructive algorithms +2
2000
1674-D A-B-C Sort
constructive algorithms implementation sortings
1200
1674-C Infinite Replacement
combinatorics implementation strings
1000
1674-B Dictionary
combinatorics math
800
1674-A Number Transformation
constructive algorithms math
800
1673-F Anti-Theft Road Planning
bitmasks constructive algorithms divide and conquer +3
2400
1673-E Power or XOR?
bitmasks combinatorics math +1
2500
1673-D Lost Arithmetic Progression
combinatorics math number theory
1900
1673-C Palindrome Basis
brute force dp math +1
1500
1673-B A Perfectly Balanced String?
brute force greedy strings
1100
1673-A Subtle Substring Subtraction
games greedy strings
800
1672-I PermutationForces
data structures greedy
3000
1672-H Zigu Zagu
constructive algorithms data structures greedy
2700
1672-G Cross Xor
constructive algorithms graphs math +1
3200
1672-F2 Checker for Array Shuffling
constructive algorithms dfs and similar graphs
2800
1672-F1 Array Shuffling
constructive algorithms graphs greedy
2000
1672-E notepad.exe
binary search constructive algorithms greedy +1
2200
1672-D Cyclic Rotation
constructive algorithms greedy implementation +1
1700
1672-C Unequal Array
constructive algorithms greedy implementation
1100
1672-B I love AAAB
constructive algorithms implementation
800
1672-A Log Chopping
games implementation math
800
1671-F Permutation Counting
brute force combinatorics dp +2
2700
1671-E Preorder
combinatorics divide and conquer dp +4
2100
1671-D Insert a Progression
brute force constructive algorithms greedy
1600
1671-C Dolce Vita
binary search brute force greedy +1
1200
1671-B Consecutive Points Segment
brute force math sortings
1000
1671-A String Building
implementation
800
1670-F Jee, You See?
bitmasks combinatorics dp
2400
1670-E Hemose on the Tree
bitmasks constructive algorithms dfs and similar +1
2200
1670-D Very Suspicious
binary search brute force geometry +3
1700
1670-C Where is the Pizza?
data structures dfs and similar dsu +3
1400
1670-B Dorms War
brute force implementation strings
1100
1670-A Prof. Slim
greedy implementation sortings
800
1669-H Maximal AND
bitmasks greedy math
1300
1669-G Fall Down
dfs and similar implementation
1200
1669-F Eating Candies
binary search data structures greedy +1
1100
1669-E 2-Letter Strings
data structures math strings
1200
1669-D Colorful Stamp
implementation
1100
1669-C Odd/Even Increments
greedy implementation math
800
1669-B Triple
implementation sortings
800
1669-A Division?
implementation
800
1668-B Social Distance
greedy math sortings
900
1668-A Direction Change
implementation math
800
1667-F Yin Yang
implementation
3500
1667-E Centroid Probabilities
combinatorics dp fft +1
3000