#!/bin/python

import sys

def transform(arr):
    b = []
    for k in range(len(arr)):
        for i in range(len(arr) - k):
            j = i + k
            b.append(max(arr[i : j + 1]))
    return b

def solve(arr):
    #  Return the sum of S(S(A)) modulo 10^9+7.
    wholeArr = transform(transform(arr))
    return sum(wholeArr)
    
if __name__ == "__main__":
    n = int(raw_input().strip())
    a = map(int, raw_input().strip().split(' '))
    result = solve(a)
    print result