Submission #539906

#	Time	Username	Problem	Language	Result	Execution time	Memory
539906		hhhhaura	Zagrade (COI20_zagrade)	C++14	100 / 100	853 ms	2164 KiB

zagrade

#define wiwihorz
#include <bits/stdc++.h>
#define rep(i, a, b) for(int i = a; i <= b; i ++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(x) x.begin(), x.end()
#define int long long int 
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())
#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)
using namespace std;
#ifdef wiwihorz
#define print(a...)cerr<<"Line "<<__LINE__<<":",kout("["+string(#a)+"] = ", a)
void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
void kout(){cerr<< endl;}
template<class T1,class ... T2>void kout(T1 a,T2 ... e){cerr<<a<<" ",kout(e...);}
#else
#define print(...) 0
#define vprint(...) 0
#endif

signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, q;
	cin >> n >> q;
	vector<int> a(n + 1, 0), st;
	auto query = [&](int L, int R) {
		cout << "? " << L << " " << R << "\n";
		cout.flush();
		int x; cin >> x;
		return x;
	};
	auto report = [&]() {
		cout << "! ";
		rep(i, 1, n) cout << (a[i] ? ")" : "(");
		cout << "\n";
		cout.flush();
	};
	rep(i, 1, n) {
		if(!st.size()) st.push_back(i);
		else {
			int cur = st.back();
			if(query(cur, i)) {
				st.pop_back();
				a[i] = 1;
			}
			else st.push_back(i);
		}
	}
	assert(st.size() % 2 == 0);
	int sz = st.size() / 2;
	rep(i, 0, sz - 1) a[st[i]] = 1;
	report();
	return 0;
}

Compilation message (stderr)

zagrade.cpp:17:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   17 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
      |             ^~~~
zagrade.cpp:17:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   17 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
      |                    ^~~~

• Subtask 1: 14 / 14
• Subtask 2: 7 / 7
• Subtask 3: 57 / 57
• Subtask 4: 22 / 22