online_judge_1388

#include <iostream>using namespace std;int main(){    long long F[72];    F[0] = 0;    F[1] = 1;    int i;    for(i=2; i<72; ++i)    {        F[i] = F[i-2] + F[i-1];    }    while(cin>>i)        cout<<F[i+1]<<endl;    return 0;}