#include <iostream>
using namespace std;

int main() {
    int ans = 0;
    for (int a = 1; a <= 9; ++a)
        for (int b = 1; b <= 9; ++b) if (b != a)
            for (int c = 1; c <= 9; ++c) if (c != a && c != b)
                for (int d = 1; d <= 9; ++d) if (d != a && d != b && d != c)
                    for (int e = 1; e <= 9; ++e)
                        if (e != a && e != b && e != c && e != d) {
                            long long left  = (10LL * a + b) * (100LL * c + 10LL * d + e);
                            long long right = (100LL * a + 10LL * d + b) * (10LL * c + e);
                            if (left == right) ++ans;
                        }
    cout << ans << endl;
    return 0;
}
/**************************************************************
	Problem: 1257
	User: admin
	Language: C++
	Result: Runtime Error
****************************************************************/