#include <bits/stdc++.h>
using namespace std;
const int N = 1e4 + 5;
int a[N];
int main()
{
int n;
cin >> n;
for(int i = 1; i <= n; i ++ )
cin >> a[i];
int ans = 0;
int l, r, cnt;
for(int i = 1; i <= n; i ++ )
{
l = a[i], r = a[i];
for(int j = i; j <= n; j ++ )
{
l = min(l, a[j]);
r = max(r, a[j]);
if(j - i == r - l) ans ++ ;
}
}
cout << ans;
}