#include <iostream>
using namespace std;
const int N = 1E4 + 10;
int a[N];
int main(){
    int n;  cin >> n;
    for(int i = 0; i < n; i ++ )    cin >> a[i];
    int cnt = 0;
    for(int i = 0; i < n; i ++ ){
        int maxv = -1;
        int minv = 0x3f3f3f;
        for(int j = i; j < n; j ++ ){
            maxv = max(maxv, a[j]);
            minv = min(minv, a[j]);
            int amount = j - i + 1;
            if(amount == maxv - minv + 1)   cnt ++ ;
        }
    }
    cout << cnt << endl;
    return 0;
}