#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int N;
    cin >> N;

    vector<int> A(N);
    for(int &a : A) cin >> a;

    vector<pair<int,int>> p;
    int pre = A[0], cnt = 0;
    rep(i, 0, N){
        if(A[i] == pre) cnt++;
        else{
            p.push_back({pre, cnt});
            pre = A[i];
            cnt = 1;
        }
    }
    p.push_back({pre, cnt});

    ll ans = N*(N+1)/2;
    for(auto [i,j] : p){
        if(i == 1){
            ans -= ll(j*(j+1)/2);
        }
    }
    cout << ans << endl;

    return 0;
}