#include<bits/stdc++.h>
//ios::sync_with_stdio(false);cin.tie(0);
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<pii,int> ppii;
typedef pair<int,pii> pipi;
typedef pair<ll,ll> pll;
typedef pair<pll,ll> ppll;
typedef pair<ll,pll> plpl;
typedef tuple<ll,ll,ll> tl;
ll mod=1000000007;
ll mod2=998244353;
ll mod3=1000003;
ll mod4=998244853;
ll inf=1000000000000000000;
double pi=2*acos(0);
#define rep(i,m,n) for(ll i=m;i<n;i++)
#define rrep(i,n,m) for(ll i=n;i>=m;i--)
int dh[4]={1,-1,0,0};
int dw[4]={0,0,1,-1};
int ddh[8]={-1,-1,-1,0,0,1,1,1};
int ddw[8]={-1,0,1,-1,1,-1,0,1};
ll lmax(ll a,ll b){
    if(a<b)return b;
    else return a;
}
ll lmin(ll a,ll b){
    if(a<b)return a;
    else return b;
}
ll gcd(ll a,ll b){
    if(a<b)swap(a,b);
    if(b==0)return a;
    if(a%b==0)return b;
    return gcd(b,a%b);
}
ll Pow(ll n,ll k){
    ll ret=1;
    ll now=n;
    while(k>0){
        if(k&1)ret*=now;
        now*=now;
        k/=2;
    }
    return ret;
}
ll beki(ll n,ll k){
    ll ret=1;
    ll now=n;
    while(k>0){
        if(k%2==1){
            ret*=now;
            ret%=mod;
        }
        now*=now;
        now%=mod;
        k/=2;
    }
    return ret;
}
ll gyaku(ll n){
    return beki(n,mod-2);
}

int main(){
    ios::sync_with_stdio(false);cin.tie(0);
    ll n;cin>>n;
    
    ll m=(n-1)/3;
    ll r=(m%mod)*((m-1)%mod);
    r%=mod;
    r*=gyaku(2);
    r%=mod;
    ll t;
    if(n%2==1){
        if(m%2==1){
            ll a=(n-m)/2;
            ll b=(n-2)/2;
            a%=mod;
            b%=mod;
            ll c=b*(b+1)%mod;
            c*=gyaku(2);
            c%=mod;
            ll d=a*(a-1+mod)%mod;
            d*=gyaku(2);
            d%=mod;
            c+=-d+mod;
            c%=mod;
            c*=2;
            c%=mod;
            c+=(n-1-m)/2;
            t=c%mod;
        }
        else{
            ll a=(n-m-1)/2;
            ll b=(n-2)/2;
            a%=mod;
            b%=mod;
            ll c=b*(b+1)%mod;
            c*=gyaku(2);
            c%=mod;
            ll d=a*(a-1+mod)%mod;
            d*=gyaku(2);
            d%=mod;
            c+=-d+mod;
            c%=mod;
            c*=2;
            c%=mod;
            t=c;
        }
    }
    else{
        if(m%2==1){
            ll a=(n-m-1)/2;
            ll b=(n-3)/2;
            a%=mod;
            b%=mod;
            ll c=b*(b+1)%mod;
            c*=gyaku(2);
            c%=mod;
            ll d=a*(a-1+mod)%mod;
            d*=gyaku(2);
            d%=mod;
            c+=-d+mod;
            c%=mod;
            c*=2;
            c%=mod;
            c+=(n-2)/2;
            t=c%mod;
        }
        else{
            ll a=(n-m)/2;
            ll b=(n-3)/2;
            a%=mod;
            b%=mod;
            ll c=b*(b+1)%mod;
            c*=gyaku(2);
            c%=mod;
            ll d=a*(a-1+mod)%mod;
            d*=gyaku(2);
            d%=mod;
            c+=-d+mod;
            c%=mod;
            c*=2;
            c%=mod;
            c+=(n-1-m)/2;
            c%=mod;
            c+=(n-2)/2;
            c%=mod;
            t=c;
        }
    }
    t+=-r+mod;
    t%=mod;
    cout<<t<<endl;
}