import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}

void main()
{
  int n; readV(n);
  string s; readV(s);

  auto c = 0, m = 0;
  foreach (i; 0..n) {
    c += s[i] == '(' ? +1 : -1;
    m = min(m, c);
  }

  writeln('('.repeat.take(-m), s, ')'.repeat.take(c-m));
}
