#include <iostream>
#include <string.h>
#include <cstdio>
#include <algorithm>
#include <string>
#include <iomanip>
#include <math.h>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <vector>
#include <unordered_set>
#include <unordered_map>
using namespace std;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;

int main(){
    
    freopen("game.in","r",stdin);
    freopen("game.out","w",stdout);
    
    int n; 
    cin >> n;
    
    string pre, cur;
    cin >> pre;
    long long total = 1;
    int score = 1;
    
  
    for (int i = 2; i <= n; i++){
        cin >> cur;
        if(cur == pre)
            score++; 
        else
            score = 1;
        total += score;
        pre = cur;
    }
    
    cout << total;

    return 0;
}

王超伟写题给我写好了呀！