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ICPC Breadth And Implementation 01

This pack is for ICPC-style breadth plus implementation stability: banker-first ordering, one-machine realism, and a late slot that still punishes sloppy code.

Who This Is For

Use this pack if:

  • standard contest-core families already feel familiar in isolation
  • you want one session that tests opening order, switching, and code reliability together
  • your main misses are no longer “I have never seen this,” but “I mis-prioritized it” or “the implementation leaked”

Entry Gate

Try this pack only if these already feel like review:

If slot 5 still feels shaky, treat it as the late implementation slot rather than the first target.

Pack Shape

  • Type: ICPC breadth + implementation drill
  • Topic mix: Graphs + strings + DP + data structures
  • Problems: 5
  • Suggested time: 3-4 hours

Topics Under Test

  • recognizing the safest banker quickly
  • switching from compact banker solves into medium graph and DP slots without losing machine tempo
  • keeping machine time on the cleanest current solve
  • protecting accepted checkpoints before reviving the late implementation slot

Suggested Order

Slot Problem Topic Why it is here
1 Message Route BFS + reconstruction First banker: low setup cost, quick graph read, and one clean path-certification loop.
2 String Matching KMP Second banker: compact linear implementation and a very different modeling surface from slot 1.
3 Road Reparation MST / DSU Medium graph slot where the key is not mistaking MST for shortest-path thinking.
4 Book Shop Knapsack DP Forces a mental reset into state/iteration discipline after two graph-facing slots.
5 Dynamic Range Sum Queries Segment tree Late implementation slot: simple idea, but one indexing or interval mistake can still sink the session.

How To Run It

  1. spend 15-20 minutes on a real opening triage before writing code
  2. fill one short board with:
  3. banker / medium / investment
  4. owner
  5. machine priority
  6. bailout minute
  7. solve in the suggested order unless the triage board gives a concrete reason to swap two adjacent slots
  8. after each slot, decide bank / hand off / park, not just “keep poking it”
  9. if one slot stalls for about 20-25 minutes with no localized bug or invariant, park it and move

Allowed Refreshers

Debrief

After the pack, log:

  1. first triage mistake
  2. first machine-usage mistake
  3. first implementation leak that cost real time
  4. whether slot 5 died from fatigue, weak retrieval, or interval/index discipline
  5. the slot that should become your next focused ladder revisit

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