#!/bin/python3

import sys

def solve(A):
    #  Return the sum of S(S(A)) modulo 10^9+7.
    def array_func(arr):
    
        new_arr = []
    
        for filter_size in range(1,len(arr)+1):
            for i in range(len(arr)-filter_size+1):
                new_arr.append(max(arr[i:i+filter_size]))
    
        return new_arr
    
    return sum(array_func(array_func(A)))

if __name__ == "__main__":
    n = int(input().strip())
    a = list(map(int, input().strip().split(' ')))
    result = solve(a)
    print(result)