#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
 
#define ll long long
#define pii pair<ll,ll>
#define fi first
#define sec second
#define ld long double
template <typename T>
ostream& operator << (ostream& os, vector<T>tmp){
    os << "[";
    for(auto x : tmp) os << " " << x;
    os << " ]";
 
    return os;
}
 
template <typename T>
ostream& operator << (ostream& os, set<T>tmp){
    os << "[";
    for(auto x : tmp) os << " " << x;
    os << " ]";
 
    return os;
}
 
template <typename T>
ostream& operator << (ostream& os, multiset<T>tmp){
    os << "[";
    for(auto x : tmp) os << " " << x;
    os << " ]";
 
    return os;
}
 
ostream& operator << (ostream& os, pii x){
    os << "[";
    os << " " << x.fi << " " << x.sec;
    os << " ]";
 
    return os;
}
const ll MOD = 1e9 + 7;
const ll N = 2e3 + 5;
const ll INF = 2e18;
// modulo operations
void add(ll &a, ll b) { a = (a + b) % MOD; }
void sub(ll &a, ll b) { a -= b; while(a < 0) a += MOD; a %= MOD; }
void mul(ll &a, ll b) { a = (a * b) % MOD; }
ll expo(ll a, ll b) {
    ll ans = 1;
    while(b > 0){
        if(b & 1) mul(ans, a);
        mul(a, a);
        b /= 2;
    }
    return ans;
}
int32_t main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int tc = 1;
    // cin >> tc;
    for(;tc--;){
        ll n; cin >> n;
        vector<ll>a(n + 5);
        for(int i = 1; i <= n; i++) cin >> a[i];
        cout << n * a[1] << "\n";
    }   
}
 
/*
*/
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