Submission #1160948

#	Time	Username	Problem	Language	Result	Execution time	Memory
1160948		jmyszka2007	Zagrade (COI20_zagrade)	C++17	100 / 100	239 ms	1156 KiB

zagrade

#include <bits/stdc++.h>
#include <fstream>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
template<class A, class B>
ostream& operator<<(ostream& o, const pair<A, B>& p) {return o << '(' << p.first << ", " << p.second << ')';}
template<size_t Index = 0, typename... Types>
ostream& printTupleElements(ostream& o, const tuple<Types...>& t) {if constexpr (Index < sizeof...(Types)){if(Index > 0){o << ", ";}o << get<Index>(t);printTupleElements<Index + 1>(o, t);}return o;}
template<typename... Types>
ostream& operator<<(ostream& o, const tuple<Types...>& t){o << "(";printTupleElements(o, t);return o << ")";}
template<class T>
auto operator<<(ostream& o, const T& x) -> decltype(x.end(), o){o << '{';bool first = true;for (const auto& e : x){if (!first){o << ", ";}o << e;first = false;} return o << '}';}
struct custom_hash {static uint64_t splitmix64(uint64_t x) {x += 0x9e3779b97f4a7c15;x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;x = (x ^ (x >> 27)) * 0x94d049bb133111eb;return x ^ (x >> 31);}
size_t operator()(uint64_t x) const {static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();return splitmix64(x + FIXED_RANDOM);}};
//#define DEBUG
#ifdef DEBUG
#define fastio()
#define debug(x...) cerr << "[" #x "]: ", [](auto... $) {((cerr << $ << "; "), ...); }(x), cerr << '\n'
#else
#define fastio() ios_base::sync_with_stdio(0); cin.tie(0);
#define debug(...)
#endif
typedef long long ll;
#define pi pair<int, int>
#define pll pair<ll, ll>
#define st first
#define nd second
#define vi vector<int>
#define vll vector<ll>
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
void solve() {
	//ifstream cin("nazwa.in");
	//ofstream cout("nazwa.out");
	auto ask = [&](int l, int r) {
		cout << "? " << l << ' ' << r << endl;
		int x;
		cin >> x;
		return x;
	};
	int n, q;
	cin >> n >> q;
	vi s;
	s.eb(1);
	vector<char>res(n + 1);
	for(int i = 2; i <= n; i++) {
		if(!sz(s)) {
			s.eb(i);
		}
		else {
			int v = s.back();
			if(ask(v, i)) {
				res[v] = '(';
				res[i] = ')';
				s.pop_back();
			}
			else {
				s.eb(i);
			}
		}
	}
	for(int i = 0; i < sz(s); i++) {
		if(i < sz(s) / 2) {
			res[s[i]] = ')';
		}
		else {
			res[s[i]] = '(';
		}
	}
	cout << "! ";
	for(int i = 1; i <= n; i++) {
		cout << res[i];
	}
	cout << endl;
}
int main() {
	fastio();
	int t = 1;
	//cin >> t;
	while(t--) {
		solve();
	}
}

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