#include <bits/stdc++.h>
using namespace std;
#define int long long
#define REP(i, n) for (long long i = 0, max_i = (n); i < max_i; i++)
#define REPI(i, a, b) for (long long i = (a), max_i = (b); i < max_i; i++)
#define ALL(obj) begin(obj), end(obj)
#define RALL(obj) rbegin(obj), rend(obj)
#define fi first
#define se second
using ii = pair<int, int>;
vector<ii> dirs = {
  {1, 0}, {0, 1}, {-1, 0}, {0, -1},  // 4方向
  {1, 1}, {-1, 1}, {-1, -1}, {1, -1},  // 斜め
  {0, 0},  // 自身
};
template <class T> inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } return false; }
template <class T> inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; } return false; }
template <class T, class S> vector<T> make_vec(size_t n, S x) { return vector<T>(n, x); }
template <class T, class... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec<T>(ts...))>(n, make_vec<T>(ts...)); }

// debug
template <class T> ostream& operator<<(ostream& s, vector<T>& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : " "); return s; }
template <class T> ostream& operator<<(ostream& s, vector<vector<T>>& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : "\n"); return s; }
template <class T, class S> ostream& operator<<(ostream& s, pair<T, S>& p) { s << "{" << p.first << ", " << p.second << "}"; return s; }
template <class T, class S> ostream& operator<<(ostream& s, map<T, S> m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; }
#ifdef _MY_DEBUG
  #define dump(...) cerr << "/* " << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << endl, dump_func(__VA_ARGS__), cerr << "*/\n\n";
#else
  #define dump(...)
  #define endl "\n"
#endif
void dump_func() { cerr << endl; }
template <class Head, class... Tail> void dump_func(Head&& h, Tail&&... t) { cerr << h << (sizeof...(Tail) == 0 ? "" : ", "), dump_func(forward<Tail>(t)...); }

struct Fast { Fast() { cin.tie(0); ios::sync_with_stdio(false); } } fast;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
constexpr int MOD = 1000000007;
// *************** TEMPLATE END *************** 

struct UnionFind {
  int cnt; // 集合の数
  vector<int> number; // 0以上のとき親のindex, 負のときは集合サイズ
  vector<pair<int, int>> data; // [left, right)
  UnionFind(int n) : cnt(n), number(n, -1), data(n) {
    for (int i = 0; i < n; i++) data[i] = {i, i + 1};
  }
  int root(int x) {
    return number[x] < 0 ? x : number[x] = root(number[x]);
  }
  void unite(int x, int y) {
    x = root(x); y = root(y);
    if (x == y) return;
    if (number[y] < number[x]) swap(x, y);
    // yをxにマージ
    number[x] += number[y];
    number[y] = x;
    // dataのマージ方法に合わせて変える
    data[x] = {min(data[x].first, data[y].first), max(data[x].second, data[y].second)};
    cnt--;
  }
  bool is_same(int x, int y) { return root(x) == root(y); }
  int size(int x) { return -number[root(x)]; }
  int& left(int x) { return data[root(x)].first; }
  int& right(int x) { return data[root(x)].second; }
  pair<int, int>& ref(int x) { return data[root(x)]; }
};

signed main() {
  int n; cin >> n;
  vector<int> rev(n);
  vector<int> a(n); REP (i, n) cin >> a[i], a[i]--, rev[a[i]] = i;
  UnionFind uf(n);
  int ans = 0;
  for (int x = n - 1; x >= 0; x--) {
    int i = rev[x];
    if (i - 1 >= 0 && a[i - 1] >= x) uf.unite(i - 1, i);
    if (i + 1 < n && a[i + 1] >= x) uf.unite(i, i + 1);
    ans += (x + 1) * (i - uf.left(i) + 1) * (uf.right(i) - i);
  }
  cout << ans << endl;
}


Measured memory_bytes: 8064