# Original solution
import bisect


class BTreeNode:
    def __init__(self):
        self.key = []
        self.child = []


class BTree:
    def __init__(self):
        self.root = BTreeNode()

    def search_higher(self, key):
        ptr = self.root
        ret = None
        while ptr.child:
            i = bisect.bisect_right(ptr.key, key)
            if i != len(ptr.key):
                ret = ptr.key[i]
            ptr = ptr.child[i]
        i = bisect.bisect_right(ptr.key, key)
        if i != len(ptr.key):
            ret = ptr.key[i]
        return ret

    def search_lower(self, key):
        ptr = self.root
        ret = None
        while ptr.child:
            i = bisect.bisect_left(ptr.key, key)
            if i != 0:
                ret = ptr.key[i - 1]
            ptr = ptr.child[i]
        i = bisect.bisect_left(ptr.key, key)
        if i != 0:
            ret = ptr.key[i - 1]
        return ret

    def insert(self, key):
        def insert_rec(ptr):
            b_size = 512
            if not ptr.child:
                bisect.insort(ptr.key, key)
                if len(ptr.key) == b_size * 2 - 1:
                        ret = BTreeNode()
                        ret.key = ptr.key[:b_size]
                        ptr.key = ptr.key[b_size:]
                        return ret
            else:
                i = bisect.bisect(ptr.key, key)
                temp = insert_rec(ptr.child[i])
                if temp is not None:
                    ptr.key.insert(i, temp.key.pop(-1))
                    ptr.child.insert(i, temp)
                    if len(ptr.child) == b_size * 2:
                        ret = BTreeNode()
                        ret.child = ptr.child[:b_size]
                        ptr.child = ptr.child[b_size:]
                        ret.key = ptr.key[:b_size]
                        ptr.key = ptr.key[b_size:]
                        return ret
            return None
        temp = insert_rec(self.root)
        if temp is not None:
            root = BTreeNode()
            root.key = [temp.key.pop(-1)]
            root.child = [temp, self.root]
            self.root = root

    def dump(self):
        def dump_rec(ptr, dep):
            for _ in range(0, dep):
                print("  ", end="")
            print(ptr.key)
            for c in ptr.child:
                dump_rec(c, dep + 1)
        dump_rec(self.root, 0)
        print("")


def main():
    n,*a=map(int,open(0).read().split())
    l=[0]*n
    for i,v in enumerate(a,1):l[v-1]=i
    t=BTree()
    t.insert(0)
    t.insert(n+1)
    c=0
    for i,v in enumerate(l,1):
        c+=(t.search_higher(v)-v)*(v-t.search_lower(v))*i
        t.insert(v)
    print(c)
main()


# Optimized solution
from bisect import*
class BTreeNode:
    def __init__(self):self.key,self.child=[],[]
class BTree:
    def __init__(self):self.root=BTreeNode()
    def search_higher(self,key):
        ptr=self.root
        ret=None
        while ptr.child:
            i=bisect(ptr.key,key)
            if i!=len(ptr.key):ret=ptr.key[i]
            ptr=ptr.child[i]
        i=bisect(ptr.key,key)
        if i!=len(ptr.key):ret=ptr.key[i]
        return ret
    def search_lower(self,key):
        ptr=self.root
        ret=None
        while ptr.child:
            i=bisect_left(ptr.key,key)
            if i:ret=ptr.key[i-1]
            ptr=ptr.child[i]
        i=bisect_left(ptr.key,key)
        if i:ret=ptr.key[i-1]
        return ret
    def insert(self,key):
        def insert_rec(ptr,key):
            b_size=512
            if not ptr.child:
                insort(ptr.key,key)
                if len(ptr.key)==b_size*2-1:
                    ret=BTreeNode()
                    ret.key=ptr.key[:b_size]
                    ptr.key=ptr.key[b_size:]
                    return ret
            else:
                i=bisect(ptr.key,key)
                tmp=insert_rec(ptr.child[i],key)
                if tmp:
                    ptr.key.insert(i,tmp.key.pop())
                    ptr.child.insert(i,tmp)
                    if len(ptr.child)==b_size*2:
                        ret=BTreeNode()
                        ret.child=ptr.child[:b_size]
                        ptr.child=ptr.child[b_size:]
                        ret.key=ptr.key[:b_size]
                        ptr.key=ptr.key[b_size:]
                        return ret
                return None
        tmp=insert_rec(self.root,key)
        if tmp:
            root=BTreeNode()
            root.key=[tmp.key.pop()]
            root.child=[tmp,self.root]
            self.root=root
def main():
    n,*a=list(map(int,open(0).read().split()))
    l=[0]*n
    for i,v in enumerate(a,1):l[v-1]=i
    t=BTree()
    t.insert(0)
    t.insert(n+1)
    c=0
    for i,v in enumerate(l,1):
        c+=(t.search_higher(v)-v)*(v-t.search_lower(v))*i
        t.insert(v)
    print(c)
main()