Submission #1235549

#TimeUsernameProblemLanguageResultExecution timeMemory
1235549HanksburgerZagrade (COI20_zagrade)C++20
0 / 100
0 ms416 KiB
#include <bits/stdc++.h> using namespace std; int main() { int n, q, cnt=0; cin >> n >> q; vector<char> ans(n, 0); set<int> s; for (int i=0; i<n; i++) s.insert(i); for (auto it=next(s.begin()); it!=s.end();) { cout << "? " << *prev(it) << ' ' << *it << '\n'; fflush(stdout); int x; cin >> x; if (x) { ans[*prev(it)]='('; ans[*it]=')'; cnt++; it++; s.erase(prev(prev(it))); s.erase(prev(it)); } else it++; } cnt=n/2-cnt; cout << "! "; for (int i=0; i<n; i++) { if (ans[i]) cout << ans[i]; else if (cnt) { cout << ')'; cnt--; } else cout << '('; } fflush(stdout); }
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