Submission #583774

#	Time	Username	Problem	Language	Result	Execution time	Memory
583774		eecs	Zagrade (COI20_zagrade)	C++17	0 / 100	0 ms	208 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n >> *new int;
    auto ask = [&](int a, int b) {
        cout << "? " << a << " " << b << endl;
        return cin >> a, a;
    };
    vector<int> st;
    vector<char> res(n + 1);
    for (int i = 1; i <= n; i++) {
        if (st.empty() || !ask(st.back(), i)) st.push_back(i);
        else res[st.back()] = '(', res[i] = ')', st.pop_back();
    }
    for (int i = 0; i < st.size() / 2; i++) {
        res[st[i]] = ')';
    }
    for (int i = st.size() / 2; i < st.size(); i++) {
        res[st[i]] = '(';
    }
    cout << "!";
    for (int i = 1; i <= n; i++) {
        cout << " " << res[i];
    }
    cout << endl;
    return 0;
}

Compilation message (stderr)

zagrade.cpp: In function 'int main()':
zagrade.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for (int i = 0; i < st.size() / 2; i++) {
      |                     ~~^~~~~~~~~~~~~~~
zagrade.cpp:21:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int i = st.size() / 2; i < st.size(); i++) {
      |                                 ~~^~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 7
• Subtask 3: 0 / 57
• Subtask 4: 0 / 22