n=int(input())
a=[-1]+list(map(int,input().split()))
f=[0]*(n+3)
ind=[0]*(n+3)
for i in range(1,n+1):
    ind[a[i]]=i

l=ind[0]
r=ind[0]
f[1]=l*(n-r+1)

for x in range(2,n+1):
    r=max(r,ind[x-1])
    l=min(l,ind[x-1])
    f[x]=l*(n-r+1)


ans=0
for x in range(1,n+1):
    ans+=x*(f[x]-f[x+1])


print(ans)