80???

#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
int main(){
    int la,lb,lc,a[100001],b[1000],c[100001];
    string s1,s2;
    cin>>s1>>s2;
    memset(a,0,sizeof(a));
    memset(b,0,sizeof(b));
    memset(c,0,sizeof(c));
    la = s1.length();
    lb = s2.length();
    for (int i=0; i<la; i++) a[i]=s1[la-i-1]-48;
    for (int i=0; i<lb; i++) b[i]=s2[lb-i-1]-48;
    for (int i=0; i<la; i++)        
          for (int j=0; j<lb; j++){        
          c[i+j] += a[i] * b[j] ;        
          c[i+j+1] += c[i+j] / 10;
          c[i+j] = c[i+j] % 10;
         }
    lc = la + lb;
    while (lc>=1 && c[lc]==0) lc--;         
    for (int i=lc; i>=0; i--) cout<<c[i];
    cout<<endl;
    return 0;
}