Created
April 22, 2022 16:13
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| const arr = [8, 9, 1, 2, 3] | |
| const limit = 6 | |
| const akamigSum = (arr: readonly number[], x: number) => | |
| arr | |
| .map(item => item + x) | |
| .filter(item => item > 0) | |
| .reduce((a, b) => a + b) | |
| const fib = (arr: readonly number[], limit: number) => { | |
| let xMin = -Math.max(...arr) | |
| let xMax = 0 | |
| while (xMin < xMax) { | |
| const xMid = Math.floor((xMin + xMax) / 2) | |
| const sum = akamigSum(arr, xMid) | |
| if (sum === limit) return xMid | |
| if (sum < limit) { | |
| xMin = xMid + 1 | |
| continue | |
| } | |
| if (sum > limit) { | |
| xMax = xMid - 1 | |
| continue | |
| } | |
| } | |
| // 근처에 있는 x (xMin, xMax) 중 작은 거 | |
| return xMin | |
| } | |
| console.log(fib(arr, limit)) |
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