#include <bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

int main()
{
	ios::sync_with_stdio(0); 
	cin.tie(0);	
	int n, s;
	cin >> n >> s;
	int cur = s, ans = 0;
	FOR(i, 0, n)
	{
		string str;
		cin >> str;
		int y = 0;
		if (str.back() == 'L')
		{
			str.pop_back();
			y = 1;
		}
		int x = stoi(str);
		if (cur < x + y)
		{
			cur = s;
			ans++;
		}
		cur -= x + y;
	}
	cout << ans << "\n";
	return 0;
}