# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
583780 | eecs | Zagrade (COI20_zagrade) | C++17 | 901 ms | 1188 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
cin >> n >> *new int;
auto ask = [&](int a, int b) {
cout << "? " << a + 1 << " " << b + 1 << endl;
return cin >> a, a;
};
string res(n, '(');
vector<int> st;
for (int i = 0; i < n; i++) {
if (st.empty() || !ask(st.back(), i)) st.push_back(i);
else res[i] = ')', st.pop_back();
}
for (int i = 0; i < st.size() / 2; i++) {
res[st[i]] = ')';
}
cout << "! " << res << endl;
return 0;
}
Compilation message (stderr)
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