#include <stdio.h>

#define MOD 1000000000
long long dp[101][10];

int main() {
    for (int i=1; i<10; i++) dp[1][i] = 1;
    
    int N;
    scanf("%d",&N);

    for (int n=1; n<N; n++) {
        for (int num=0; num<10; num++) {

            if (dp[n][num] == 0) continue;

            int next_num = num - 1;
            if (0<=next_num && next_num <=9) {
                dp[n+1][next_num] += dp[n][num];
                dp[n+1][next_num] %= MOD;
            }

            next_num = num + 1;
            if (0<=next_num && next_num <=9) {
                dp[n+1][next_num] += dp[n][num];
                dp[n+1][next_num] %= MOD;
            }
        }
    }

    long long result = 0;
    for(int i=0; i<10; i++) {
        result += dp[N][i];
        result %= MOD;
    }
    printf("%lld\n",result);

    return 0;
}