1 #include<bits/stdc++.h>
2 using namespace std;
3
4 int main()
5 {
6 string s1,s2;
7 int a[2009]={0};
8 int b[2009]={0};
9 int c[2000009]={0};
10 cin>>s1>>s2;
11 int len1=s1.length();
12 int len2=s2.length();
13 for(int i=1;i<=len1;i++)
14 a[i]=s1[len1-i]-'0';
15 for(int i=1;i<=len2;i++)
16 b[i]=s2[len2-i]-'0';
17 for(int i=1;i<=len1;i++)
18 {
19 for(int j=1;j<=len2;j++)
20 {
21 c[i+j-1]+=a[i]*b[j];
22 c[i+j]+=c[i+j-1]/10;
23 c[i+j-1]%=10;
24 }
25 }
26 int len=len1+len2+1;
27 while((c[len]==0)&&len>1)len--;
28 for(int i=len;i>=1;i--)cout<<c[i];
29 }
