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3 changes: 2 additions & 1 deletion src/lib/utils/contest.ts
Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,7 @@ export const classifyContest = (contest_id: string) => {
return null;
};

// HACK: As of September 2025, the following contests are applicable.
// HACK: As of December 2025, the following contests are applicable.
// Note: The classification logic may need to be revised when new contests are added.
const ABC_LIKE: ContestPrefix = {
'tenka1-2017-beginner': 'Tenka1 Programmer Beginner Contest 2017',
Expand Down Expand Up @@ -126,6 +126,7 @@ const ARC_LIKE: ContestPrefix = {
keyence2020: 'キーエンス プログラミング コンテスト 2020',
keyence2021: 'キーエンス プログラミング コンテスト 2021',
'jsc2019-qual': '第一回日本最強プログラマー学生選手権-予選-',
'nikkei2019-qual': '全国統一プログラミング王決定戦予選',
} as const;
const arcLikePrefixes = new Set(getContestPrefixes(ARC_LIKE));

Expand Down
4 changes: 4 additions & 0 deletions src/test/lib/utils/test_cases/contest_type.ts
Original file line number Diff line number Diff line change
Expand Up @@ -289,6 +289,10 @@ export const arcLike = [
contestId: 'jsc2019-qual',
expected: ContestType.ARC_LIKE,
}),
createTestCaseForContestType('NIKKEI2019 QUAL')({
contestId: 'nikkei2019-qual',
expected: ContestType.ARC_LIKE,
}),
];

export const agcLike = [
Expand Down
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