救救蜀黍吧！大佬们

#include <bits/stdc++.h>
using namespace std;
vector<int>mul(vector<int> &a,int b)
{
    vector<int> c;
    int t=0;
	for(int i=0;i<a.size();i++)
    {
        t+=a[i]*b;
        c.push_back(t%10);
         t/=10;
    }
        while(t>0){c.push_back(t%10);t/=10;}
		while(c.back()==0&&c.size()>1)c.pop_back();
    return c;
}
	
int main() {
	string a;
    int b;
    cin>>a>>b;
    vector<int>A,C;
    for(int i=a.size()-1;i>=0;i--)A.push_back(a[i]-'0');
       C=mul(A,b);
    for(int i=C.size()-1;i>=0;i--)cout<<C[i]; 
    
 return 0;
}