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# Problem Tags Rating Solved
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
1667-D Edge Elimination
constructive algorithms dfs and similar dp +1
2900
1667-C Half Queen Cover
constructive algorithms math
2400
1667-B Optimal Partition
data structures dp
2100
1667-A Make it Increasing
brute force greedy math
1300
1666-L Labyrinth
dfs and similar graphs
1800
1666-K Kingdom Partition
flows
3200
1666-J Job Lookup
constructive algorithms dp shortest paths +1
2100
1666-I Interactive Treasure Hunt
brute force constructive algorithms geometry +2
2200
1666-H Heroes of Might
math
3500
1666-G Global Warming
geometry math
3100
1666-F Fancy Stack
combinatorics dp implementation
2200
1666-E Even Split
binary search constructive algorithms greedy +1
2500
1666-D Deletive Editing
greedy
900