#include <bits/stdc++.h>
using namespace std;
int main() {
  int a;
  int b;
  int c;
  int d;
  int e;
  cin >> a;
  int aa[a];
  for (b = 0; b < a; ++b) {
    cin >> aa[b];
  }
  d = aa[0];
  c = 0;
  b = 0;
  vector<int> ab;
  while (b < a) {
    if (aa[b] > d) d = aa[b];
    if ((b + 1) == d) c = c + 1;
    b = b + 1;
  }
  cout << c << endl;
  return 0;
}
