#include <stdio.h>
typedef unsigned long long ull;
int main(void)
{
    int P;
    scanf("%d", &P);
    P--;
    ull ans1 = 10;
    ull ans2 = 6;
    for (int i = 0; i < P; i++) {
        ans1 *= 10;
        ans2 *= 9;
    }
    ans1 -= ans2;
    ans1--;
    printf("%llu\n", ans1);
    return 0;
}