#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

#include <atcoder/modint>
using mint = atcoder::modint;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int p, n;
  cin >> p >> n;
  mint::set_mod(p);
  vector<int> a(n);
  rep(i, n) cin >> a[i];
  string s;
  cin >> s;
  mint ans = a[0];
  rep(i, n - 1) {
    if (s[i] == '+')
      ans += a[i + 1];
    if (s[i] == '-')
      ans -= a[i + 1];
    if (s[i] == '*')
      ans *= a[i + 1];
    if (s[i] == '/')
      ans /= a[i + 1];
  }
  cout << ans.val() << '\n';
  return 0;
}