#include <iostream> #include <string> using namespace std; string qw(string num1,string num2){ if(num1=="0"||num2=="0") return "0"; int n1=num1.size(); int n2=num2.size(); string s(n1+n2,'0'); for(int i=n1-1;i>=0;i--){ for(int j=n2-1;j>=0;j--){ int mul=(num1[i]-'0')*(num2[j]-'0'); int sum=mul+(s[i+j+1]-'0'); s[i+j+1]=(sum%10)+'0'; s[i+j]+=sum/10; } } if(s[0]=='0'){ s.erase(s.begin()); } return s; } int main(){ string a,b; cin>>a>>b; string s=qw(a,b); cout<<s<<endl; return 0; }