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Computer Network#534

Orta · Dynamic programming · Prefix Sums

Shoring Up the Levees#535

Orta · Geometry · Math · Sorting · Implementation

Combination Lock#536

Ýeňil · Math · Implementation · Brute force

Oleh's Lotto Tickets#537

Örän ýeňil · Implementation · Data Structures

A No-Win Situation#538

Orta · Implementation · Brute force

A Walk in the Park#539

Kyn · Sorting · Greedy algorithms · Implementation · Data Structures

Teleport Out!#540

Kyn · Graphs · Dynamic programming · Implementation

Worms#541

Orta · Dynamic programming

Soda Supplier#542

Ýeňil · Math

Money Matters#543

Örän ýeňil · Disjoint set union · Implementation

Allergy Test#544

Örän ýeňil · Sorting · Greedy algorithms

Rain Fall#545

Örän ýeňil · Math · Implementation

Racing Game#546

Orta · Graphs · Dijkstra algorithm · Brute force

Gokigen Naname#547

Kyn · Depth-first Search · Graphs · Disjoint set union · Implementation

Flight Planning#548

Örän ýeňil · Graphs · Brute force

Beacons#549

Örän ýeňil · Graphs · Geometry

Playfair Cipher#550

Orta · Implementation · Strings

Code Permutations#551

Kyn · Number theory · Combinatorics · Dynamic programming · Bitmasks · Prime factorization · Math

Numerical sequence#552

Ýeňil · Dynamic programming

Recursion#553

Örän ýeňil · Depth-first Search

Inscribed Circle#554

Ýeňil · Geometry

The nearest points#555

Örän ýeňil · Sorting

The sum of two numbers#556

Orta · Brute force · Sorting

Cutting rectangle#557

Örän ýeňil · Dynamic programming

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