#include <bits/stdc++.h>
using namespace std;
#define mp       make_pair
#define pb       push_back
#define all(x)   (x).begin(),(x).end()
#define YES() printf("YES\n")
#define NO() printf("NO\n")
#define Yes() printf("Yes\n")
#define No() printf("No\n")
#define in(x,y,h,w) x >= 0 && x < h && y >= 0 && y < w

#define int long long
//typedef    long long          ll;
typedef    vector<bool>       vb;
typedef    vector<int>        vi;
typedef    vector<vb>         vvb;
typedef    vector<vi>         vvi;
typedef    pair<int,int>      P;

template <typename T> T &chmin(T &a, const T &b) { return a = min(a, b); }
template <typename T> T &chmax(T &a, const T &b) { return a = max(a, b); }
 
const int INF=1e+18;
const double EPS=1e-9;
const int MOD=1000000007;
 
const int dx[]={1,0,-1,0},dy[]={0,-1,0,1};

signed main(){
	int n,l,r,ans = 0,tmp = 1,dp[100010][70] = {},fact[100010] = {0,1};
	cin >> n >> l >> r;
	for(int i = 2;i <= n;i++) fact[i] = (fact[i - 1] * i) % MOD;
	dp[0][0] = 1;
	for(int i = 1;i < n;i++){
		for(int j = 1;j < 70;j++) dp[i][j] = (dp[i - 1][j - 1] + (i - 1) * dp[i - 1][j]) % MOD;
	}
	for(int i = 0;;i++){
		if(tmp > r) break;
		if(l <= tmp && tmp <= r) ans = (ans + dp[n - 1][i]) % MOD;
		tmp *= 2;
	}
	if(!l) ans = (ans + fact[n] - fact[n - 1] + MOD) % MOD;
	cout << ans << endl;
	return 0;
}