deno.land / x / masx200_leetcode_test@10.6.5 / single-number-ii / index.ts
1234567891011121314export default function singleNumber(nums: number[]): number { const once = new Set<number>(); const twice = new Set<number>(); for (const n of nums) { if (once.has(n)) { twice.add(n); } else { once.add(n); } } twice.forEach((n) => once.delete(n)); return [...once.keys()][0];}
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