#include <iostream>
#include <set>
using namespace std;

typedef long long ll;
ll A[200010],B[200010];
ll N;

int main(){
	cin >> N;
	for(int i=1;i<=N;i++){
		cin >> A[i];
		B[A[i]] = i;
	}
	set<ll> s,t;
	ll ans = 0;
	s.insert(0);
	t.insert(N+1);
	for(int i=1;i<=N;i++){
		s.insert(-B[i]);
		t.insert(B[i]);
		set<ll>::iterator it = s.upper_bound(-B[i]); 
		set<ll>::iterator it2 = t.upper_bound(B[i]);
		ll l = -*it;
		ll r = *it2;
		ans += i*(B[i]-l)*(r-B[i]);
	}
	cout << ans << endl;
}