#include <bits/stdc++.h>
using namespace std;
const int N = 10010;
int n;
int arr[N];
int main()
{
cin >> n;
for(int i = 1;i <= n;i++) cin >> arr[i];
int res = 0;
for(int i = 1;i <= n;i++){
int Max = arr[i],Min = arr[i];
for(int j = i;j <= n;j++){
Max = max(Max,arr[j]);
Min = min(Min,arr[j]);
if(Max - Min == j - i) res++;
}
}
cout << res;
return 0;
}