题目：

题解：

#include <bits/stdc++.h>
using namespace std;
int k;
int main()
{
    cin >> k;
    int a = k / 50000;
    for (int i = 1; i <= a; i++) cout << "(";
    int b = k % 50000;
    for (int i = 50000; i >=1 ; i--)
    {
        if(i == b) cout << "(";
        cout << ")";
    }
    return 0;
}