#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

ll mo;

ll modpow(ll a, ll n = mo-2) {
	ll r=1;a%=mo;
	while(n) r=r*((n%2)?a:1)%mo,a=a*a%mo,n>>=1;
	return r;
}

int N,P;
int A[101010];
string S;

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>mo>>N;
	FOR(i,N) cin>>A[i];
	ll v=A[0];
	cin>>S;
	FOR(i,N-1) {
		if(S[i]=='+') {
			v=(v+A[i+1])%mo;
		}
		if(S[i]=='-') {
			v=(v+mo-A[i+1])%mo;
		}
		if(S[i]=='*') {
			v=(v*A[i+1])%mo;
		}
		if(S[i]=='/') {
			v=(v*modpow(A[i+1]))%mo;
		}
	}
	cout<<v<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}