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Meet PNB

PNB is Petski and Bale — two people with a habit of overthinking algorithms. Most of the work now goes into a LeetCode-style system that isn't fully public yet.

Team size
Two people
Style
quiet & direct
Background
contests & teaching
Focus
LeetCode system
Petski

Petski

Systems & contests

Petski spends most days inside C++ and Python, thinking about how people actually solve problems under pressure. Past years went into contests and teaching; now most of that energy is pointed at a LeetCode-style system for practice and review.

200+ students tutored
5.0/5 Avg. rating (Fiverr)
Codeforces Candidate Master
Coach of national teams (IOI/BOI/JBOI)

Selected highlights

  • Background in competitive programming (Codeforces CM-level)
  • Coaching experience with IOI, BOI, JBOI teams
  • Years of teaching algorithms and data structures
LeetCodeCodeforcesIOIFiverr
Bale

Bale

Algorithms & contests

Bale has an algorithms background (including IOI) and likes turning tricky ideas into small, testable steps. He helps stress-test problems, edge cases, and flows inside the system so it stays honest.

IOI Silver Medalist
Competitive programming
Algorithm specialist
Elite mentor

Selected highlights

  • International Olympiad in Informatics — Silver
  • Work with contest finalists and problem sets
  • Deep focus on algorithms & data structures
LeetCodeCodeforcesIOI

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