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# Problem Tags Rating Solved
1559-D1 Mocha and Diana (Easy Version)
brute force constructive algorithms dsu +3
1400
1559-C Mocha and Hiking
constructive algorithms graphs
1200
1559-B Mocha and Red and Blue
dp greedy
900
1559-A Mocha and Math
bitmasks constructive algorithms math
900
1558-F Strange Sort
data structures sortings
3300
1558-E Down Below
binary search dfs and similar graphs +3
3000
1558-D Top-Notch Insertions
combinatorics data structures
2600
1558-C Bottom-Tier Reversals
constructive algorithms greedy
2000
1558-B Up the Strip
brute force dp math +2
1900
1558-A Charmed by the Game
brute force math
1300
1557-E Assiut Chess
brute force constructive algorithms interactive
2800
1557-D Ezzat and Grid
data structures dp greedy
2200
1557-C Moamen and XOR
bitmasks combinatorics dp +2
1700
1557-B Moamen and k-subarrays
greedy sortings
1100
1557-A Ezzat and Two Subsequences
brute force math sortings
800
1556-H DIY Tree
graphs greedy math +1
3300
1556-G Gates to Another World
bitmasks data structures dsu +1
3300
1556-F Sports Betting
bitmasks combinatorics dp +3
2500
1556-E Equilibrium
data structures dp greedy
2200
1556-D Take a Guess
bitmasks constructive algorithms interactive +1
1800
1556-C Compressed Bracket Sequence
brute force implementation
1800
1556-B Take Your Places!
implementation
1300
1556-A A Variety of Operations
math
800
1555-F Good Graph
data structures dsu graphs +1
2700
1555-E Boring Segments
data structures sortings trees +1
2100
1555-D Say No to Palindromes
brute force constructive algorithms dp +1
1600
1555-C Coin Rows
brute force constructive algorithms dp +1
1300
1555-B Two Tables
brute force
1300
1555-A PizzaForces
brute force math
900
1554-E You
dfs and similar dp math +1
2600
1554-D Diane
constructive algorithms greedy strings
1800
1554-C Mikasa
binary search bitmasks greedy +1
1800
1554-B Cobb
bitmasks brute force greedy +1
1700
1554-A Cherry
greedy
800
1553-I Stairs
combinatorics divide and conquer dp +2
3400
1553-H XOR and Distance
bitmasks divide and conquer trees
2900
1553-G Common Divisor Graph
brute force constructive algorithms dsu +4
2700
1553-F Pairwise Modulo
data structures math
2300
1553-E Permutation Shift
brute force combinatorics constructive algorithms +4
2100
1553-D Backspace
dp greedy strings +1
1500
1553-C Penalty
bitmasks brute force dp +1
1200
1553-B Reverse String
brute force dp hashing +2
1300
1553-A Digits Sum
math number theory
800
1552-I Organizing a Music Festival
dfs and similar math
3400
1552-H Guess the Perimeter
binary search interactive number theory
3300
1552-G A Serious Referee
bitmasks brute force dfs and similar +1
3000
1552-F Telepanting
binary search data structures dp +1
2200
1552-E Colors and Intervals
constructive algorithms data structures greedy +1
2300
1552-D Array Differentiation
bitmasks brute force constructive algorithms +4
1800
1552-C Maximize the Intersections
combinatorics constructive algorithms geometry +2
1800