Hackerrank: Sock Merchant Solution
1function sockMerchant(n, ar) {2 const group = ar.reduce((acc, el) => {3 if (acc[el]) {4 acc[el] += 15 } else {6 acc[el] = 17 }8 return acc9 }, {})10 const values = Object.values(group)11 return values.map(v => Math.floor(v / 2)).reduce((acc, el) => acc + el, 0)12}
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