玄学错误！！！！！！！！

#include<bits/stdc++.h>
using namespace std;
int a[10000000],b[10000000],c[10000000];
string p ,q;
int main()
{
    cin>>p>>q;
    for(int i=0;i<p.length();i++)
    {
        a[i+1]=int(p[p.length()-i-1])-48;
    }
    for(int i=0;i<q.length();i++)
    {
        b[i+1]=int(q[q.length()-i-1])-48;
    }

    for(int i=1;i<=q.length();i++)
    {
        int jin=0;
        int j;
            for(j=1;j<=p.length();j++)
        {
            c[i+j-1]+=a[j]*b[i]+jin;
                jin=c[i+j-1]/10;
                c[i+j-1]%=10;
        }
        c[j+i]+=jin;
    }
    for(int i=p.length()+q.length()-1;i>=1;i--)
    {
        if(i==p.length()+q.length()-1&&c[i]==0)
        continue;
        cout<<c[i];
    }

}