#include<stdio.h>
#include<math.h>
#include<string.h>
#include<algorithm>
using namespace std;
int main()
{
    int i,j,n;
    while(~scanf("%d",&n))
    {
        int a[201][51];
        memset(a,0,sizeof(a));
        a[1][0] = 1;
        a[2][0] = 2;
        a[3][0] = 3;
        int k;
        for(i = 4; i<=200; i++)
        {
            for(k = 0; k<=45; k++)
            {
                a[i][k] += a[i-2][k]+a[i-1][k];
                if(a[i][k]>9)
                {
                    a[i][k] -= 10;
                    a[i][k+1] += 1;
                }
            }
        }
        for(i = 45; i>=0; i--)
            if(a[n][i]) break;
        for(j = i; j>=0; j--)
            printf("%d",a[n][j]);
        printf("\n");
    }
    return 0;
}