1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
import { NestedInteger } from "./NestedInteger.ts";
function deserializeArray(s: string): NestedInteger {    if (s[0] !== "[") {        return new NestedInteger(parseInt(s));    }    const stack: NestedInteger[] = [];    let num = 0;    let negative = false;    for (let i = 0; i < s.length; i++) {        const c = s[i];        if (c === "-") {            negative = true;        } else if (isDigit(c)) {            num = num * 10 + Number(s[i]);        } else if (c === "[") {            stack.push(new NestedInteger());        } else if (c === "," || c === "]") {            if (isDigit(s[i - 1])) {                if (negative) {                    num *= -1;                }                stack[stack.length - 1].add(new NestedInteger(num));            }            num = 0;            negative = false;            if (c === "]" && stack.length > 1) {                const ni = stack.pop() as NestedInteger;                stack[stack.length - 1].add(ni);            }        }    }    if (stack.length >= 1) {        return stack.pop() as NestedInteger;    } else {        throw Error("accident");    }}
export default function deserialize(s: string): NestedInteger {    if (s.startsWith("[")) {        return deserializeArray(s);    } else {        return new NestedInteger(Number(s));    }}
const nums = new Set(    Array.from({        length: 10,    }).map((_v, i) => String(i)),);function isDigit(ch: string) {    return nums.has(ch);}