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// Brute-force search for any 3 promo codes whose values sum to "target".function findTriple(codes, target) {for (let i = 0; i < codes.length; i++)for (let j = 0; j < codes.length; j++)for (let k = 0; k < codes.length; k++)if (codes[i] + codes[j] + codes[k] === target) return [i, j, k];return null;}