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#include <iostream>
#include <string>
#include <cstdint>


using namespace std;


static const int SIZE = 1 << 20;


static string sA, sB, sC;

static size_t iSize;

static int8_t a[SIZE];
static int8_t b[SIZE];
static int8_t c[SIZE];

static int64_t aDP[SIZE][4];  // [right position][carry]


static void PrepareTables()
{
	for (size_t i = 0; i < iSize; ++i)
	{
		a[i] = sA[i] - '0';
		b[i] = sB[i] - '0';
		c[i] = sC[i] - '0';
	}
}


static void FillTable()
{
	int64_t m;

	for (int iCarry = 0; iCarry < 4; ++iCarry)
	{
		int k = a[0] + b[0] + iCarry;

		aDP[0][iCarry] = (k == c[0]) ? 1 : 0;
	}

	for (size_t iPos = 1; iPos < iSize; ++iPos)
	{
		for (int iCarry = 0; iCarry < 4; ++iCarry)
		{
			int k = a[iPos] + b[iPos] + iCarry;

			if ((k % 10) != c[iPos])
			{
				aDP[iPos][iCarry] = 0;
				continue;
			}

			m = (k < 10) ? 1 : 0;

			m += aDP[iPos - 1][k / 10];

			aDP[iPos][iCarry] = m;
		}
	}
}


static int64_t GetResult()
{
	int64_t iRes = 0;

	for (size_t iPos = 0; iPos < iSize; ++iPos)
	{
		iRes += aDP[iPos][0];
	}

	return iRes;
}


int main()
{
	// freopen("sample_input.txt", "r", stdin);
	// freopen("sample_output.txt", "w", stdout);

	cin >> sA >> sB >> sC;

	iSize = sC.length();

	PrepareTables();

	FillTable();

	int64_t iRes = GetResult();

	cout << iRes;
}