import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
// dfmt on

void main()
{
    long N = lread();
    auto S = sread();
    long l;
    long level;
    foreach (c; S)
    {
        if (c == '(')
            level++;
        if (c == ')')
        {
            if (level)
            {
                level--;
            }
            else
            {
                l++;
            }
        }
    }
    long r = level;
    writeln(repeat('(').take(l).array, S, repeat(')').take(r).array);
}
