// Created by ...
#include <bits/stdc++.h>

#define vll vector< ll >
#define M 100000
#define MD 1000000007
#define pb push_back
#define sz(x) (int)(x).size()
#define rep(i,a,b) for(ll i = a; i <= b; ++i)
#define per(i,a,b) for(ll i = a; i >= b; --i)
#define pii pair<ll,ll> 
#define vec(a) vector<a >
#define all(a) (a).begin(),(a).end()
#define EACH(x, a) for (auto& x:a)
#define se second
#define fi first
#define inf 0xffffffff
#define int long long
#define endl '\n'
#define IOS ios::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)

using namespace std;
using ll = long long;
ll md=MD;

ll exp(ll a,ll b){ll r=1ll;while(b>0){if(b&1){r=r*(a%md);r=(r+md)%md;}b>>=1;a=(a%md)*(a%md);a=(a+md)%md;}return (r+md)%md;}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
template<class T> T Min(T a,T b){if(a<b)return a; return b;}
template<class T> T Max(T a,T b){if(a>b)return a; return b;}

int32_t main() {
    IOS;

        ll n;
        cin>>n;
        vll v(2*n);
        rep(i,0,2*n-1) cin>>v[i];
        vll o(2*n);
        iota(all(o),0);
        sort(all(o),[&](int i,int j){
            return v[i]<v[j];
        });
        rep(i,0,n-1)v[o[i]]=0;
        rep(i,n,2*n-1)v[o[i]]=1;
        string ans;
        stack<int> st;
        rep(i,0,2*n-1){
            if(st.empty()){
                ans+='(';
                st.push(v[i]);
            }
            else{
                if(st.top()==v[i]){
                    st.push(v[i]);
                    ans+='(';
                }
                else{
                    ans+=')';
                    st.pop();
                }
            }
        }
        cout<<ans;
        cout<<'\n';
    return 0;
}
#include <bits/stdc++.h>
using namespace std;
struct Fast {
    Fast() {
        cin.tie(0);
        ios::sync_with_stdio(false);
        cout << fixed << setprecision(20);
    }
} fast;
template <typename A, size_t N, typename T> void Fill(A (&array)[N], const T& val) {
    std::fill((T*)array, (T*)(array + N), val);
}
// long long mod = 998244353;
#define REP(i, n) for (long long i = 0; i < (n); i++)
#define rep(i, a, n) for (long long i = a; i < (n); i++)
typedef long long ll;
typedef pair<ll, ll> P;
long long mod = 1000000007;
long long modpow(long long m, long long n, long long modvalue) {
    if (n == 0) return 1;
    if (n % 2 == 0) {
        long long t = modpow(m, n / 2, modvalue);
        return t * t % modvalue;
    } else {
        return modpow(m, n - 1, modvalue) * m % modvalue;
    }
}

long long moddiv(long long a, long long b, ll modvalue) { return (a * modpow(b, mod - 2, modvalue)) % modvalue; }

const ll INF = 1LL << 60;

string change_binary(long long a) {
    string ret;
    for (int i = 31; i >= 0; i--) {
        ret += (a >> i & 1) + '0';
    }
    return ret;
}

ll nCkmod(ll n, ll k, ll modvalue) {
    ll numera = 1;
    for (int i = n; i > n - k; i--) {
        numera *= i;
        numera %= modvalue;
    }
    ll denomi = 1;
    REP(i, k) {
        denomi *= (i + 1);
        denomi %= modvalue;
    }
    return moddiv(numera, denomi, modvalue);
}

map<ll, ll> cnt;
void primeFactors(long long n) {
    while (n % 2 == 0) {
        cnt[2]++;
        n = n / 2;
    }
    for (int i = 3; i <= sqrt(n); i = i + 2) {
        while (n % i == 0) {
            cnt[i]++;
            n = n / i;
        }
    }
    if (n > 2) {
        cnt[n]++;
    }
}
vector<ll> dijkstra(vector<vector<P>> graph, ll s) {
    vector<ll> ans(graph.size(), -1);
    priority_queue<P, vector<P>, greater<P>> pq;
    pq.push({0, s});
    while (pq.size() > 0) {
        ll cur1 = 0;
        ll cur2 = 0;
        if (ans[pq.top().second] != -1) {
            pq.pop();
        } else {
            cur1 = pq.top().first;
            cur2 = pq.top().second;
            pq.pop();
            ans[cur2] = cur1;
            for (ll i = 0; i < graph[cur2].size(); i++) {
                pq.push({cur1 + graph[cur2][i].first, graph[cur2][i].second});
            }
        }
    }
    return ans;
}
ll gcd(ll a, ll b) {
    if (a % b == 0) {
        return b;
    } else {
        return gcd(b, a % b);
    }
}
struct UnionFind {
    vector<int> parent, size;
    UnionFind(int n) {
        parent.resize(n, -1);
        size.resize(n, 1);
    }
    void unite(int x, int y) {
        if (same(x, y)) {
            return;
        }
        x = root(x);
        y = root(y);
        if (size[x] <= size[y]) {
            swap(x, y);
        }
        parent[y] = x;
        size[x] += size[y];
    }
    bool same(int x, int y) { return (root(x) == root(y)); }
    int root(int x) {
        while (parent[x] != -1) {
            x = parent[x];
        }
        return x;
    }
    int getsize(int x) { return size[root(x)]; }
};
double dp[103][103][103];
int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    cout << a * d - b * c << endl;
}