Pith Number

pith:S5ATDEXM

pith:2023:S5ATDEXM7BJSALEPU5X5BQSC5S

not attested not anchored not stored refs pending

Problem-Solving Guide: Predicting the Algorithm Tags and Difficulty for Competitive Programming Problems

Dongbin Na, Eunjung Cho, Juntae Kim

arxiv:2310.05791 v2 · 2023-10-09 · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S5ATDEXM7BJSALEPU5X5BQSC5S}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T09:19:52.316414Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97413192ecf853202c8fa76fd0c242ecb18614c090c2707e37491cc1dc8fdd8a

Aliases

arxiv: 2310.05791 · arxiv_version: 2310.05791v2 · doi: 10.48550/arxiv.2310.05791 · pith_short_12: S5ATDEXM7BJS · pith_short_16: S5ATDEXM7BJSALEP · pith_short_8: S5ATDEXM

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/S5ATDEXM7BJSALEPU5X5BQSC5S \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 97413192ecf853202c8fa76fd0c242ecb18614c090c2707e37491cc1dc8fdd8a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a60a31db7b94fde1d0fc900bffedc5f32382749e7d0d34170b61027cf7eb9ee5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2023-10-09T15:26:07Z",
    "title_canon_sha256": "a21e937f1252d1d91f3df28c7584056e2daaaee5bda41a6d67f8e6eaeb3ec511"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2310.05791",
    "kind": "arxiv",
    "version": 2
  }
}