Sereja has a sequence that consists of n positive integers, a1, a2, ..., an. 

First Sereja took a piece of squared paper and wrote all distinct non-empty non-decreasing subsequences of sequence a. Then for each sequence written on the squared paper, Sereja wrote on a piece of lines paper all sequences that do not exceed it.

A sequence of positive integers x = x1, x2, ..., xr doesn't exceed a sequence of positive integers y = y1, y2, ..., yr, if the following inequation holds: x1 ≤ y1, x2 ≤ y2, ..., xr ≤ yr.

Now Sereja wonders, how many sequences are written on the lines piece of paper. Help Sereja, find the required quantity modulo 1000000007 (109 + 7). 

Input

The first line contains integer n (1 ≤ n ≤ 105). The second line contains n integers a1, a2, ..., an (1 ≤ ai ≤ 106).

Output

In the single line print the answer to the problem modulo 1000000007 (109 + 7).

Examples

Input

1
42


Output

42


Input

3
1 2 2


Output

13


Input

5
1 2 3 4 5


Output

719
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Random;
import java.util.StringTokenizer;

public class Solution{
	
	
	
	static final int mod = (int)1e9+7;
	static final int N = (int)1e6+10;
	
	
	
    public static void main(String[] args) throws IOException {
    	
		
    	FastScanner fs = new FastScanner();
    	PrintWriter out = new PrintWriter(System.out);
    		
    	int tt = 1;
    	while(tt-->0) {
    		
    		
    		int n = fs.nextInt();
    		int[] a = fs.readArray(n);
    		
    		Ftree ft = new Ftree(N);
    		
    		for(int i=0;i<n;i++) {
    			int x = a[i];
    			int cur = sub(ft.query(x), ft.query(x-1));
    			ft.update(x, sub(add(mul(ft.query(x), x), x), cur));
    			int  f= 1;
    		}
    		
    		out.println(ft.query(N));
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    		
    	}
    	
    	out.close();
    		
    	
    	
    }
    
    
    
    static int add(int a,int b) {
    	a += b;
    	if(a>=mod) return a - mod;
    	return a;
    }
    
    static int sub(int a, int b) {
    	a -= b;
    	if(a<0) return a + mod;
    	return a;
    }
    
    
    static int mul(int a,int b) {
    	return (int)(((long)a*b)%mod);
    }
    
    
    
    static class Ftree{
    	int[] bit;
    	int n;
    	
    	Ftree(int n){
    		bit = new int[n+1];
    		this.n = n;
    	}
    	
    	void update(int ind,int val) {
    		while(ind<=n) {
    			bit[ind] = add(bit[ind], val);
    			ind += ind&(-ind);
    		}
    	}
    	
    	int query(int ind) {
    		int sum = 0;
    		while(ind>0) {
    			sum = add(sum, bit[ind]);
    			ind -= ind&(-ind);
    		}
    		return sum;
    	}
    	
    }
    
    
    
    
    
    
    
    static final Random random=new Random();
    
    static <T> void shuffle(T[] arr) {
    	int n = arr.length;
    	for(int i=0;i<n;i++	) {
    		int k = random.nextInt(n);
    		T temp = arr[k]; arr[k] = arr[i]; arr[i] = temp;
    	}
    }
    
    	
    static void ruffleSort(int[] a) {
    	int n=a.length;//shuffle, then sort 
    	for (int i=0; i<n; i++) {
    		int oi=random.nextInt(n); int temp=a[oi];
    		a[oi]=a[i]; a[i]=temp;
    	}
    	Arrays.sort(a);
    }
    
    static void ruffleSort(long[] a) {
    	int n=a.length;//shuffle, then sort 
    	for (int i=0; i<n; i++) {
    		int oi=random.nextInt(n); long temp=a[oi];
    		a[oi]=a[i]; a[i]=temp;
    	}
    	Arrays.sort(a);
    }
   
  
    
    static void reverse(int[] arr, int l, int r) {
    	for(int i=l;i<l+(r-l)/2;i++){
    		int temp = arr[i]; arr[i] = arr[r-i+l-1]; arr[r-i+l-1] = temp;
    	}
    }
    
    static void reverse(long[] arr, int l, int r) {
    	for(int i=l;i<l+(r-l)/2;i++){
    		long temp = arr[i]; arr[i] = arr[r-i+l-1]; arr[r-i+l-1] = temp;
    	}
    }
    
    
    static <T> void reverse(T[] arr, int l, int r) {
    	for(int i=l;i<l+(r-l)/2;i++) {
    		T temp = arr[i]; arr[i] = arr[r-i+l-1]; arr[r-i+l-1] = temp;
    	}
    }
    	
    	
    static class FastScanner{
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	StringTokenizer st = new StringTokenizer("");
     
    	public String next(){
    		while(!st.hasMoreElements()){
    			try{
    				st = new StringTokenizer(br.readLine());
    			} catch(IOException e){
    				e.printStackTrace();
    			}
    		}
    		return st.nextToken();
    	}
    		
    	public String nextLine() throws IOException {
    		return br.readLine();
    	}
    		
    	public int nextInt(){
    		return Integer.parseInt(next());
    	}
     
    	public int[] readArray(int n){
    		int[] a = new int[n];
    		for(int i=0;i<n;i++)
    			a[i] = nextInt();
    		return a;
    	}
    		
    	public long nextLong() {
    		return Long.parseLong(next());
    	}
    		
    	public char nextChar() {
    		return next().toCharArray()[0];
    	}
    }
   	
}
