180518_14623_감정이입

	//https://www.acmicpc.net/problem/14623 #include <iostream>
	#include <string>
	using namespace std;
	int main(){
	string b1,b2;
	cin >> b1 >> b2;
	int l1=b1.size();
	int l2=b2.size();
	int ans[64]={0,};
	int digit=1;
	int length;
	for(int i=l2-1; i>=0; --i){
	int idx=1*digit;
	for(int j=l1-1; j>=0; --j){
	ans[idx++]+=(b1[j]-'0')*(b2[i]-'0');
	}
	++digit;
	length=idx;
	}
	for(int i=1; i<length; i++){
	if(ans[i]>=2){
	ans[i+1]+=(ans[i]/2);
	ans[i]%=2;
	}
	}
	for(int i=length; i>0; i--) {
	if(i==length && ans[i]==0) continue;
	cout << ans[i];
	}
	return 0;
	}