#include <bits/stdc++.h>
using namespace std;
const int N = 10010;
int n;
int nums[N];

int main(){
    cin >> n;
    for (int i = 0; i < n; i ++ )cin >> nums[i];
    int ans = 0;
    for (int i = 0; i < n; i ++ ){
        int maxv = 0,minv = 10010;
        for (int j = i; j < n; j ++ ){
            maxv = max(maxv,nums[j]);
            minv = min(minv,nums[j]);
            if((maxv - minv) == (j - i))ans ++;
        }
    }

    cout << ans;
    return 0;
}