啊啊啊哪儿错了来位大佬康康

Yangshuhao123 @ 2024-08-31 22:02:10

#include<bits/stdc++.h>
using namespace std;
string multiplication(string s1,string s2){
    string ans;
    int i,j,a[1000],b[1000],c[1000];
    if(s1=="0"||s2=="0")
     cout<<0;
    for(i=0;i<s1.size();i++)
     a[s1.size()-1-i]=s1[i]-48;
    for(i=0;i<s2.size();i++)
     b[s2.size()-1-i]=s2[i]-48;
    int l=s1.size()+s2.size();
    for(i=0;i<s1.size();i++)
     for(j=0;j<s2.size();j++)
      c[i+j]+=a[i]*b[j];
    for(i=0;i<l;i++)
      if(c[i]>9){
        c[i+1]+=c[i]/10;
        c[i]%=10;
      }
    for(i=l-1;i>=0;i--){
        if(c[i]==0)
         l--;
        else
         break;
    }
    for(i=l-1;i>=0;i--)
     ans=ans+char(c[i]+48);
    return ans;
}
string addition(string s1,string s2){
    string ans;
    int i,a[1000],b[1000],c[1000];
    for(i=0;i<s1.size();i++)
     a[s1.size()-1-i]=s1[i]-48;
    for(i=0;i<s2.size();i++)
     b[s2.size()-1-i]=s2[i]-48;
    int l=max(s1.size(),s2.size());
    for(i=0;i<l;i++)
     c[i]=a[i]+b[i];
    for(i=0;i<l;i++)
     if(c[i]>9){
        c[i]-=10;
        c[i+1]++;
     }
    if(c[l]==0)
     l--;
    for(i=l-1;i>=0;i--)
     ans=ans+char(c[i]+48);
    return ans;
}
string int_to_str(short int n){
    string ans;
    if(n>9)
     ans=char(n/10+48)+char(n%10+48);
    else
     ans=char(n+48);
    return ans;
}
int main(){
    short int i,j,n;
    string num,ans;
    cin>>n;
    for(i=1;i<=n;i++){
        for(j=1;j<=i;j++)
         num=multiplication(num,int_to_str(j));
        ans=addition(ans,num);
    }
    cout<<ans;
    return 0;
}

by MuYuMC @ 2024-08-31 22:05:02

额，你这代码属实有点。。 看看我的吧

#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <cstdio>
#include <iomanip>
#include <map>
#include <queue>
#include <set>
#define ll long long
using namespace std;
int A[100000];
int B[100000];
void jia()
{
    int i,h;
    h = max(A[0],B[0]);
    for(i = 1;i <= h;i++)
    {
        B[i] += A[i];
        B[i + 1] += B[i] / 10;
        B[i] = B[i] % 10;
    }
    if(B[i] != 0)
    {
        B[0] = h + 1;
    }
    else
    {
        B[0] = h;
    }
}
void cheng(int x)
{
    int i;
    for(i = 1;i <= A[0];i++)
    {
        A[i] *= x;
    }
    for(i = 1;i <= A[0];i++)
    {
        A[i + 1] += A[i] / 10;
        A[i] = A[i] % 10;
    }
    while(A[i] != 0)
    {
        A[i + 1] += A[i] / 10;
        A[i] = A[i] % 10;
        A[0]++;
        i++;
    }
}
int main()
{
    int n,i;
    cin >> n;
    A[0] = 1;
    A[1] = 1;
    B[0] = 1;
    for(i = 1;i <= n;i++)
    {   
        cheng(i);
        jia();
    } 
    for(i = B[0];i >= 1;i--)
    {
        cout << B[i];
    }
    return 0;
} 

by TimADE @ 2024-08-31 22:05:08

@Yangshuhao123

#include<iostream>
#include<cstdio>
using namespace std;
int n,a[101]={0},s[101]={0};
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;
    }
}
void sc()
{
    int w;
    for(int i=0;i<=100;i++)
    {
        if(s[i]!=0)
        {
            w=i;
            break;
        }
    }
    for(int i=w;i<=100;i++)
       printf("%d",s[i]);
}
int main()
{
    scanf("%d",&n);
    s[100]=a[100]=1;
    for(int i=2;i<=n;i++)
    {
        change(i);
        qh();
    }
    sc();
    return 0;
}

by MuYuMC @ 2024-08-31 22:05:17

求关

by DESTRUCTION_WA @ 2024-09-23 11:53:50

@MuYuMC 你前面那\~\~\~\~么长的#include不能直接#include <bits/stdc++.h>万能头吗？

by MuYuMC @ 2024-09-23 12:06:20

@bored_frank 小贴士：比赛时最好不要用，要不然容易编译错误

by DESTRUCTION_WA @ 2024-09-23 12:21:08

@MuYuMC ……………………又收获了一个冷知识

by MuYuMC @ 2024-09-23 12:43:49

@bored_frank 比如y1是关键字