#include#include#includeusing namespace std;int str1[100], str2[100], res[100];int len1, len2, len3;void setData(){	string s1, s2;	cin >> s1 >> s2;	reverse(s1.begin(), s1.end()); reverse(s2.begin(), s2.end());	len1 = s1.size(); len2 = s2.size();	int i = 0;	for (auto x : s1) str1[i++] = x - '0';	i = 0;	for (auto x : s2) str2[i++] = x - '0';	}void example(){	for (int i = 0; i < 10; i++) {		str1[i] = str2[i] = i;	}	len1 = len2 = 10;}void show(){	for (int i = len3; i >= 0; i--)		cout << res[i];}void calc(int len1,int len2){	len3 = max(len1, len2)-1;//相应自始至终都不进位的情形	for (int i = 0; i < len2; i++){		for (int j = 0; j < len1; j++){			res[i + j] += str2[i] * str1[j];			if (res[i + j] >= 10){				len3 = max(len3, i + j + 1);				res[i + j + 1] += res[i + j] / 10;				res[i + j] %= 10;			}		}	}}int main(){	setData();	//example();	calc(len1,len2);	show();	getchar(); getchar();	return 0;}/*9876543210*9876543210=97546105778997104100*/