#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <queue>
#include <map>
#include <cmath>
#include <iomanip>

using namespace std;

int main() {
  int n;
  cin >> n;
  vector<int> p(n);
  for (int i = 0; i < n; i++) {
    cin >> p[i];
  }
  long long ans = 0;
  for (int i = 0; i < n; i++) {
    int now = p[i] + 1;
    if (now > n) now = 1;
    if (now > p[i]) ans += (long long)(i + 1);
    else if (now < p[i]) ans -= (long long)(i + 1);
  }
  cout << ans << endl;
  return 0;
}