题解 | #特殊乘法#

#include<iostream>
using namespace std;

int sum(int x)
{
	int count = 0;
	while(x)
	{
		count += (x % 10);
		x /= 10;
	}
	return count;
} 

int main(void)
{
	int x,y;
	while(cin >> x >> y)
	{
		cout << sum(x) * sum (y) <<endl;
	}
	return 0;
}