Submission #641576

#	Time	Username	Problem	Language	Result	Execution time	Memory
641576		makanhulia	Zagrade (COI20_zagrade)	C++17	14 / 100	3093 ms	5448 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main() 
{
    cin.tie(0); ios_base::sync_with_stdio(0);

    int n, q;
    cin >> n >> q;

    vector<int> ans(n, -1);
    set<int> s;
    s.insert(0);
    for(int i = 1; i < n; i++) {
        if(ans[i] != -1) continue;
        // cout << "Masuk " << i << '\n';
        while(!s.empty()) {
            int l = *s.rbegin(), r = i;
            if(l >= 0 && r < n) {
                cout << "? " << l + 1 << " " << r + 1 << endl;
                int x; cin >> x;
                if(x) {
                    ans[l] = 1;
                    ans[r] = 0;
                    s.erase(l);
                    i++;
                } else {
                    s.insert(r);
                    break;
                }
            } else {
                break;
            }
        }
        if(s.empty() && ans[i] == -1) s.insert(i);
    }

    for(int i = 0; i < n; i++) {
        if(ans[i] != -1) {
            int l = i - 1, r = i + 1;
            while(l >= 0 && ans[l] != -1) l--;
            while(r < n && ans[r] != -1) r++;
            if(l < 0 || r >= n) continue;
            while(l >= 0) {
                ans[l--] = 0;
                ans[r++] = 1;
            }
        }
    }

    bool all = 1;
    for(int i = 0; i < n; i++) {
        all &= ans[i] == -1;
    }

    if(all) {
        int l = n / 2 - 1, r = n / 2;
        while(l >= 0) {
            ans[l--] = 0;
            ans[r++] = 1;
        }
    }

    cout << "! ";
    for(int i = 0; i < n; i++) {
        assert(ans[i] != -1);
        if(ans[i]) cout << '('; 
        else cout << ')';
    }
}

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