#include <bits/stdc++.h>
using namespace std;
void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
template <typename T, typename V>
void __print(const pair<T, V> &x) {
  cerr << '{';
  __print(x.first);
  cerr << ',';
  __print(x.second);
  cerr << '}';
}
template <typename T>
void __print(const T &x) {
  int f = 0;
  cerr << '{';
  for (auto &i : x) cerr << (f++ ? "," : ""), __print(i);
  cerr << "}";
}
void _print() { cerr << "]\n"; }
template <typename T, typename... V>
void _print(T t, V... v) {
  __print(t);
  if (sizeof...(v)) cerr << ", ";
  _print(v...);
}
struct _ {
  ios_base::Init i;
  _() { ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL); }
} _;
int dx[] = {-1, 0, 1, 0, -1, -1, 1, 1};
int dy[] = {0, 1, 0, -1, -1, 1, 1, -1};
int main() {
  long long n, k;
  cin >> n >> k;
  vector<pair<long long, long long>> a(n);
  for (long long i = 0; i <= n - 1; i++)
    cin >> a[i].second, a[i].first = a[i].second % 10;
  sort(a.begin(), a.end(), greater<pair<long long, long long>>());
  long long c = 0;
  for (long long i = 0; i <= n - 1; i++) {
    if (k >= 10 - a[i].first and a[i].second < 100)
      a[i].second += (10 - a[i].first), k -= (10 - a[i].first), a[i].first = 0;
    c += (100 - a[i].second);
  }
  long long ans = min(k, c) / 10;
  for (long long i = 0; i <= n - 1; i++) ans += (a[i].second / 10);
  cout << ans;
  return 0;
}
