Submission #781269

#	Time	Username	Problem	Language	Result	Execution time	Memory
781269		makanhulia	Zagrade (COI20_zagrade)	C++17	0 / 100	668 ms	1440 KiB

zagrade

# include <bits/stdc++.h>
# define int long long
# define vi vector<int>
# define pb push_back
# define pii pair<int, int>
# define fi first
# define se second
# define endl '\n'

using namespace std;

bool ask(int a, int b) {
    cout << "? " << a << " " << b << endl << flush;
    int ret; cin >> ret;
    return ret;
}

void solve() {
    int n, q; 
    cin >> n >> q;
    vector<pii> v;
    for(int i=1; i<n; i++) {
        if(ask(i, i+1)) {
            v.pb({i, i+1});
        }
    }
    int last=1;
    string ans="";
    for(pii i : v) {
        int cnt=0;
        for(int j=last; j<=i.fi; j++) {
            ans+='(';
            cnt++;
        }
        for(int j=1; j<=cnt; j++) {
            ans+=')';
        }
        last+=(2*cnt);
    }
    cout << "! " << ans << endl << flush;
}
 
signed main() {
    solve();
}

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