//yukicoder@cpp17

#include <iostream>
#include <iomanip>

#include <algorithm>

#include <cmath>
#include <cctype>
#include <climits>
#include <cassert>

#include <string>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <map>

#include <random>

#include <bitset>

#include <complex>

#include <utility>

#include <numeric>

#include <functional>


using namespace std;
using ll = long long;
using P = pair<ll,ll>;

ll MOD = 998244353;
const ll MODx = 1000000007;
const int INF = (1<<30)-1;
const ll LINF = (1LL<<62LL)-1;
const double EPS = (1e-10);

P ar4[4] = {{0,1},{0,-1},{1,0},{-1,0}};
P ar8[8] = {{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};




template <typename T> vector<T> make_vector(size_t a, T b) { return vector<T>(a, b); }
template <typename... Ts> auto make_vector(size_t a, Ts... ts) { return vector<decltype(make_vector(ts...))>(a, make_vector(ts...)); }
 
 /*
確認ポイント
cout << fixed << setprecision(n) << 小数計算//n桁の小数表記になる

計算量は変わらないが楽できるシリーズ
min(max)_element(iter,iter)で一番小さい(大きい)値のポインタが帰ってくる
count(iter,iter,int)でintがiterからiterの間にいくつあったかを取得できる
*/

/*
function corner below
*/


/*
Function corner above
*/

/* comment outed because can cause bugs
__attribute__((constructor))
void initial() {
 cin.tie(0);
 ios::sync_with_stdio(false);
}
*/


long long modadd(long long A, long long B){
  return (A+B)%MOD;
}

long long modsub(long long A, long long B){
  return ((A-B)%MOD+MOD)%MOD;
}

long long modmul(long long A, long long B){
  return (A*B)%MOD;
}

long long modpow(long long A, long long B){
  long long ret = 1;
  long long mul = A;
  while(B){
    if(B%2 == 1){
      ret = modmul(mul, ret);
    }
    B/=2;
    mul = modmul(mul, mul);
  }
  return ret;
}

long long modinv(long long A){
  return modpow(A, MOD-2);
}

long long moddiv(long long A, long long B){
  return modmul(A, modinv(B));
}

int main(){
  cin>>MOD;
  int n;cin>>n;
  vector<long long> A(n);
  for(int i = 0; n > i; i++){
    cin>>A[i];
  }
  string s;cin>>s;
  long long ans = A[0];
  for(int i = 1; n > i; i++){
    if(s[i-1] == '+'){
      ans = modadd(ans, A[i]);
    }else if(s[i-1] == '-'){
      ans = modsub(ans, A[i]);
    }else if(s[i-1] == '*'){
      ans = modmul(ans, A[i]);
    }else if(s[i-1] == '/'){
      ans = moddiv(ans, A[i]);
    }
  }
  cout << ans << endl;
  return 0;
}