#include <bits/stdc++.h>
#define endl '\n'
#define el '\n'
#define ll long long
#define fast                 \
    ios::sync_with_stdio(0); \
    cin.tie(0);              \
    cout.tie(0);
using namespace std;
void solve()
{
    ll n, s; cin >> n >> s;
    ll cnt = 0, tmp = s;
    for(int i = 0;i<n;i++)
    {
        string x; cin >> x;
        if(x[x.size() - 1]=='L')
        {
            x.pop_back();        
            s -= stoi(x);
            s--;
        }
        else  s -= stoi(x);

    
        if (s < 0)s = tmp, cnt++;
    }
    cout<<cnt<<el;
}
int main()
{
    fast;
    int tc = 1;
   // cin >> tc;
    while (tc--)
    {
        solve();
    }
}