#include<bits/stdc++.h>
using lint=long long;
using real=long double;
lint mod=1'000'000'007;
void add_assign(lint&x,lint y){x+=y;if(mod<=x)x-=mod;}
lint mul(lint x,lint y){return x*y%mod;}
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    auto mat_mul=[&](auto&&a,auto&&b){
        std::vector<std::vector<lint>>c(2,std::vector<lint>(2));
        for(lint i=0;i<2;i++){
        for(lint j=0;j<2;j++){
        for(lint k=0;k<2;k++){
            add_assign(c.at(i).at(j),mul(a.at(i).at(k),b.at(k).at(j)));
        }}}
        return c;
    };
    lint n;std::cin>>n;
    std::vector<std::vector<lint>>a={
        std::vector<lint>{1,1},
        std::vector<lint>{1,0},
    };
    std::vector<std::vector<lint>>b={
        std::vector<lint>{1,0},
        std::vector<lint>{0,1},
    };
    for(;n;n>>=1){
        if(n&1)b=mat_mul(a,b);
        a=mat_mul(a,a);
    }
    std::cout<<mul(b.at(0).at(0),b.at(0).at(1))<<'\n';
}