#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define F first
#define S second
const int N = 1e5 + 2;

int main() {
    int n, m; cin>>n>>m;
    int M = m;
    int ans = 0;
    for(int i = 0; i < n; i++){
        string s; cin>>s;
        int x = s[0] - '0' + (s.size() > 1);
        if(x <= m){
            m -= x;
        }
        else {
            m = M;
            ans++;
        }
    }
    cout<<ans;
    return 0;
}