JavaScript O(n) but with division:
function Problem02(arr) { let mult = arr.slice(1).reduce((a, b) => a * b, 1); const res = [mult]; for (let i = 1; i < arr.length; i++) { mult = mult * arr[i - 1] / arr[i]; res.push(mult); // res[i] = mult; } console.log(res) }
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JavaScript O(n) but with division: