N阶数阶乘

N阶数阶乘

 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
 1process.stdin.resume();
 2process.stdin.setEncoding('utf-8');
 3let input = '';
 4process.stdin.on('data', (data) => {
 5    input += data;
 6});
 7process.stdin.on('end', () => {
 8    let inputArray = input.split('\n');
 9
10    let n = Number(inputArray[0]);
11    
12    function multiplyBigInt(a: string, b: number): string {
13        let carry = 0;
14        let result = '';
15        for (let i = a.length - 1; i >= 0; i--) {
16            let product = (parseInt(a[i]) * b) + carry;
17            result = (product % 10).toString() + result;
18            carry = Math.floor(product / 10);
19        }
20        while (carry > 0) {
21            result = (carry % 10).toString() + result;
22            carry = Math.floor(carry / 10);
23        }
24        return result;
25    }
26
27    function doFunc(n: number): string {
28        if (n <= 1000 && n >= 0) {
29            let result = '1';
30            for (let i = 2; i <= n; i++) {
31                result = multiplyBigInt(result, i);
32            }
33            return result;
34        }
35        return '0'; // 如果不在范围内，返回 '0'
36    }
37
38    let result = doFunc(n);
39    console.log(result);
40    process.exit();
41});

Copyright ©2010-2022 比特日记 All Rights Reserved.

Powered By 可尔物语

浙ICP备11005866号-12