#include <bits/stdc++.h>

using namespace std;

int N;
int x;
int values[501];
bitset<50001> dp[502];

int main()
{
    //ifstream cin("input.txt");
    //ofstream cout("output.txt");

    //ios::sync_with_stdio(false);
    //cin.tie(nullptr);

    cin >> N;

    cin >> x;
    dp[1][x] = 1;
    values[1] = x;

    for (int i=2; i <= N; i++) {
        cin >> x;
        values[i] = x;
        for (int j=0; j < 50001; j++){
            if (dp[i - 1][j] == 1){
                if (j - x >= 0){
                    dp[i][j - x] = 1;
                }
                if (j + x <= 50000){
                    dp[i][j + x] = 1;
                }
            }
        }
    }

    if (dp[N][0] == 0){
        cout << -1 << '\n';
        return 0;
    }

    string res = "";
    int j = 0;
    for (int i = N; i >= 1; i--){
        if (((j - values[i] >= 0 && dp[i - 1][j - values[i]] == 1) || (i == 1)) && i != N){
            j = j - values[i];
            for (int k=0; k < values[i]; k++){
                res = "(" + res;
            }
        } else {
            j = j + values[i];
            for (int k=0; k < values[i]; k++){
                res = ")" + res;
            }
        }
    }

    cout << res << '\n';

    return 0;
}