#include <iostream>
#include <cstdio>
using namespace std;
const int N = 1e4 + 5;

int arr[N];

int main()
{
    int n;
    scanf("%d", &n);
    for (int i = 1; i <= n; ++i) scanf("%d", &arr[i]);

    int res = n;
    for (int l = 1; l <= n-1; ++l)
    {
        int maxv = arr[l], minv = arr[l];
        for (int len = 2; l + len - 1 <= n; ++len)
        {
            int j = l + len - 1;
            if (arr[j] > maxv) maxv = arr[j];
            else if (arr[j] < minv) minv = arr[j];
            if (maxv - minv + 1 == len) res++;
        }
    }
    printf("%d", res);
    return 0;
}