#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, q;
char ch[100005];
int32_t main() {
cin >> n >> q;
for (int i = 1; i <= n; i++) ch[i] = '.';
for (int i = 1; i < n; i++) {
if (ch[i] != '.') continue;
for (int j = i + 1; j <= n; j += 2) {
if (ch[j] != '.') continue;
if (q < 0) break;
q--;
cout << "? " << i << ' ' << j << endl;
int res; cin >> res;
if (res) {
ch[i] = '(';
ch[j] = ')';
break;
}
}
}
int cnt = 0;
for (int i = 1; i <= n; i++) if (ch[i] == ')') cnt++;
string s = "";
for (int i = 1; i <= n; i++) {
if (ch[i] != '.') s += ch[i];
else if (cnt * 2 < n) {
s += ')';
cnt++;
} else s += '(';
}
cout << "! " << s << endl;
}
