蛙声一片

dingding2008 @ 2023-05-13 22:07:44

#include <bits/stdc++.h>
using namespace std;
const int N = 5010;
int a[N], b[N];
int len = 1, len2 = 1;
inline void add()
{

}
inline int mul(int x[], int y)
{
  for (int i = 1; i <= len; i++)
  {
    x[i] *= y;
  }
  for (int i = 1; i < len; i++)
  {
    x[i+1] += x[i] / 10;
    x[i] %= 10;
  }
  while (x[len] >= 10)
  {
    x[len+1] += x[len] / 10;
    x[len] %= 10;
    len++;
  }
  return len;
}
int main()
{
  int n;
  scanf("%d", &n);
  b[1] = 1;
  for (int i = 1; i <= n; i++)
  {
    mul(b, i);
    add();
  }
  for (int i = len2; i >= 1; i--)
  {
    printf("%d", a[i]);
  }
  return 0;
}

by 2011Andy @ 2023-05-13 22:12:25

考虑python(bushi

n = int(input());
jie = 1;
sum = 0;
i = 1;
while n >= i:
    jie = jie * i;
    sum = sum + jie;
    i = i + 1;
print(sum);

by dingding2008 @ 2023-05-13 22:13:51

哇！太及时了，我刚好在，但我不会python...

by 2011Andy @ 2023-05-13 22:17:06

void change(int x)
{
    int g=0;
    for(int i=100;i>=0;i--)
    {
        a[i]=a[i]*x+g;
        g=a[i]/10;
        a[i]=a[i]%10;
    }
}
void qh()
{
    int g=0;
    for(int i=100;i>=0;i--)
    {
        s[i]=s[i]+a[i]+g;
        g=s[i]/10;
        s[i]=s[i]%10;
    }
}

上面是乘 下面是加 可以分成2个函数来写

by dingding2008 @ 2023-05-14 10:00:34

已关注

by dingding2008 @ 2023-05-17 19:02:27

@2011Andy 看到了嘛?

by 2011Andy @ 2023-05-17 19:19:27

看到了thank you

QAQ

by 宇宙风景 @ 2023-05-29 12:29:12

洛谷WA中说求助，听取WA声一片……

by l3jE75oDM1k9 @ 2023-05-30 18:55:24

我也四年级

by dingding2008 @ 2023-06-02 22:04:33

哈哈

by 5735733ckl @ 2023-07-05 21:56:27

唉嘿，都不容易，这个号也是我四年级建的，现在我初一，正式学编程了，加油ヾ(◍°∇°◍)ﾉﾞ