### BUGGY CODE ###

def solve():
    #AVL

    ##search(0,x):O(logN)
    # xがある場合indexを、ない場合Noneを返す
    def search(root,key):
        if avl_key[root] > key:
            if avl_left[root] == None:
                return None
            else:
                return search(avl_left[root],key)
        if avl_key[root] < key:
            if avl_right[root] == None:
                return None
            else:
                return search(avl_right[root],key)
        return root


    ##end_lower/higher:search_lower/higherで使用
    def end_lower(root):
        if avl_left[root] == None:
            return avl_key[root]
        else:
            return end_lower(avl_left[root])

    def end_higher(root):
        if avl_right[root] == None:
            return avl_key[root]
        else:
            return end_higher(avl_right[root])


    ##search_lower(0,x,None):O(logN)
    # xより小さいものの中で最も大きいものを出力。ない場合はNoneを出力
    def search_lower(root,key,lower_key):
        if avl_key[root] > key:
            if avl_left[root] == None:
                return lower_key
            else:
                return search_lower(avl_left[root],key,lower_key)
        if avl_key[root] < key:
            lower_key = avl_key[root]
            if avl_right[root] == None:
                return lower_key
            else:
                return search_lower(avl_right[root],key,lower_key)

        # ==
        if avl_left[root] == None:
            return lower_key
        else:
            if lower_key == None:
                return end_higher(avl_left[root])
            else:
                return max(lower_key,end_higher(avl_left[root]))

    ##search_higher(0,x,None):O(logN)
    # xより大きいものの中で最も小さいものを出力。ない場合はNoneを出力
    def search_higher(root,key,higher_key):
        if avl_key[root] > key:
            higher_key = avl_key[root]
            if avl_left[root] == None:
                return higher_key
            else:
                return search_higher(avl_left[root],key,higher_key)
        if avl_key[root] < key:
            if avl_right[root] == None:
                return higher_key
            else:
                return search_higher(avl_right[root],key,higher_key)

        # ==
        if avl_right[root] == None:
            return higher_key
        else:
            if higher_key == None:
                return end_lower(avl_right[root])
            else:
                return min(higher_key,end_lower(avl_right[root]))



    ##Rotation,replace,insertx:insertで使用
    def DoubleRightRotation(x):
        tl = avl_left[x]
        avl_left[x] = avl_right[avl_right[tl]]
        avl_right[avl_right[tl]] = x
        tlr = avl_right[tl]
        avl_right[tl] = avl_left[tlr]
        avl_left[tlr] = tl
        if balance[tlr] == -1:
            balance[avl_right[tlr]] = 1
            balance[avl_left[tlr]] = 0
        elif balance[tlr] == 1:
            balance[avl_right[tlr]] = 0
            balance[avl_left[tlr]] = -1
        else:
            balance[avl_right[tlr]] = 0
            balance[avl_left[tlr]] = 0
        balance[tlr] = 0
        return tlr

    def DoubleLeftRotation(x):
        tr = avl_right[x]
        avl_right[x] = avl_left[avl_left[tr]]
        avl_left[avl_left[tr]] = x
        trl = avl_left[tr]
        avl_left[tr] = avl_right[trl]
        avl_right[trl] = tr
        if balance[trl] == 1:
            balance[avl_right[trl]] = 0
            balance[avl_left[trl]] = -1
        elif balance[trl] == -1:
            balance[avl_left[trl]] = 0
            balance[avl_right[trl]] = 1
        else:
            balance[avl_right[trl]] = 0
            balance[avl_left[trl]] = 0
        balance[trl] = 0
        return trl

    def SingleLeftRotation(x):
        tr = avl_right[x]
        balance[tr] = 0
        balance[x] = 0
        avl_right[x] = avl_left[tr]
        avl_left[tr] = x
        return tr

    def SingleRightRotation(x):
        tl = avl_left[x]
        balance[tl] = 0
        balance[x] = 0
        avl_left[x] = avl_right[tl]
        avl_right[tl] = x
        return tl

    def replace(x,p,v):
        if avl_left[p] == x:
            avl_left[p] = v
        else:
            avl_right[p] = v

    def insertx(root,p,key):
        if avl_key[root] > key:
            if avl_left[root] == None:
                avl_key.append(key)
                avl_left[root] = len(avl_key)-1
            else:
                if not insertx(avl_left[root],root,key):
                    return False
            if balance[root] == 1:
                balance[root] = 0
                return False
            elif balance[root] == 0:
                balance[root] = -1
                return True
            else:
                if balance[avl_left[root]] == 1:
                    replace(root,p,DoubleRightRotation(root))
                elif balance[avl_left[root]] == -1:
                    replace(root,p,SingleRightRotation(root))
                return False
        if avl_key[root] < key:
            if avl_right[root] == None:
                avl_key.append(key)
                avl_right[root] = len(avl_key)-1
            else:
                if not insertx(avl_right[root],root,key):
                    return False
            if balance[root] == -1:
                balance[root] = 0
                return False
            elif balance[root] == 0:
                balance[root] = 1
                return True
            else:
                if balance[avl_right[root]] == -1:
                    replace(root,p,DoubleLeftRotation(root))
                elif balance[avl_right[root]] == 1:
                    replace(root,p,SingleLeftRotation(root))
                return False
        return False


    ##insert(0,x):O(logN)
    #x追加
    def insert(root,key):
        if key < avl_key[root]:
            if avl_left[root] == None:
                avl_key.append(key)
                avl_left[root] = len(avl_key)-1
            else:
                insertx(avl_left[root],root,key)
        elif key > avl_key[root]:
            if avl_right[root] == None:
                avl_key.append(key)
                avl_right[root] = len(avl_key)-1
            else:
                insertx(avl_right[root],root,key)
        else:
            pass
    ########################################################
    ##初期化（要素は一つ入れておく）

    #avl_key:値,avl_left:左の子のindex,avl_right:右の子のindex
    #balance[i]: {"Even":0,"Left":-1,"Right":1}

    #avl_keyには初めに何か加えておく
    n = 200002
    avl_key = [0]
    avl_left = [None]*n
    avl_right = [None]*n
    balance = [0]*n


    n,*a=map(int,open(0).read().split())
    l=[0]*n
    for i,v in enumerate(a,1):
        l[v-1]=i
    insert(0,0)
    insert(0,n+1)
    c=0
    for i,v in enumerate(l,1):
        c+=(search_higher(0,v,None)-v)*(v-search_lower(0,v,None))*i
        insert(0,v)
    print(c)
if __name__=='__main__':
    solve()

### FIXED CODE ###

root=lambda x:x if par[x]==x else root(par[x])
same=lambda x,y:root(x)==root(y)
def unite(*z):
  x,y=map(root,z)
  if x!=y:
    if rank[x]<rank[y]:
      par[x]=y
      size[y]+=size[x]
    else:
      par[y]=x
      size[x]+=size[y]
      if rank[x]==rank[y]:rank[x]+=1
n,*a=map(int,open(0).read().split())
*par,=range(n)
rank=[1]*n
size=[1]*n
b=[0]*n
for i,t in enumerate(a):b[t-1]=i
c=0
for k in b[::-1]:
  l=r=1
  if k>0 and a[k-1]>a[k]:
    l+=size[root(k-1)]
    unite(k-1,k)
  if k+1<n and a[k+1]>a[k]:
    r+=size[root(k+1)]
    unite(k+1,k)
  c+=l*r*a[k]
print(c)