Submission #1034296

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034296		Luvidi	Zagrade (COI20_zagrade)	C++17	100 / 100	586 ms	1744 KiB

zagrade

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

#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

void solve() {
    int n,q;
    cin>>n>>q;
    string ans;
    for(int i=1;i<=n;i++)ans+='.';
    vector<int> v;
    for(int i=1;i<=n;i++){
        v.pb(i);
        if(v.size()==1)continue;
        int x=v.size();
        cout<<"? "<<v[x-2]<<' '<<v[x-1]<<endl;
        bool b;
        cin>>b;
        if(b){
            ans[v[x-2]-1]='(';
            ans[v[x-1]-1]=')';
            v.pop_back();
            v.pop_back();
        }
    }
    for(int i=0;i<v.size()/2;i++)ans[v[i]-1]=')';
    for(int i=v.size()/2;i<v.size();i++)ans[v[i]-1]='(';
    cout<<"! "<<ans;
}

int main() {   
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();
}

Compilation message (stderr)

zagrade.cpp: In function 'void solve()':
zagrade.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i=0;i<v.size()/2;i++)ans[v[i]-1]=')';
      |                 ~^~~~~~~~~~~
zagrade.cpp:32:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=v.size()/2;i<v.size();i++)ans[v[i]-1]='(';
      |                          ~^~~~~~~~~

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