1016 部分A+B

#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
	long long int a, da, b, db, d, result1 = 0, result2 = 0;
	scanf("%lld %lld %lld %lld", &a, &da, &b, &db);
	
	while(a != 0)
	{
		d = a % 10;
		if(d == da)
		{
			result1 = result1 * 10 + d;
		}
		a /= 10;
	}
	while(b != 0)
	{
		d = b % 10;
		if(d == db)
		{
			result2 = result2 * 10 + d;
		}
		b /= 10;
	}
	
	printf("%lld\n", result1 + result2);
	
	return 0;
}