#include <stdio.h>
#include <vector>

using namespace std;

#define maxim(a, b) ((a > b) ? a : b)
#define NMax 1000005

int N, mx, nr_int = 1;
char uz[NMax];
vector<int> G[100005];
long long bst = 0;

int main(void)
{
    int i, j, x, sz;
    
    freopen("operatii.in", "r", stdin);
    freopen("operatii.out", "w", stdout);

    scanf("%d", &N);
    for (i = 1; i <= N; i++)
    {
        scanf("%d", &x);
        G[x].push_back(i);
        mx = maxim(mx, x);
    }

    uz[0] = uz[N+1] = 1;
    for (i = 0; i <= mx; i++)
    {
        for (sz = G[i].size(), j = 0; j < sz; j++)
        {
            x = G[i][j];
            if (!uz[x-1] && !uz[x+1]) nr_int++;
            else if (uz[x-1] && uz[x+1]) nr_int--;
            uz[x] = 1;
        }

        bst += nr_int;
    }
    
    printf("%lld\n", bst);

    return 0;    
}