Submission #1096276

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096276		laure	Colors (BOI20_colors)	C++14	9 / 100	1 ms	448 KiB

Colors

#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    int p=1,c=n,x;
    cout<<"? 1"<<endl;
    cin>>x;
    cout<<"? "<<n<<endl;
    cin>>x;
    if(x)c--;
    for(int i=2;i<=(n/2);i++)
    {
        cout<<"? "<<i<<endl;
        cin>>x;
        if(x)c--;
        else break;
        cout<<"? "<<n-i+1<<endl;
        cin>>x;
        if(x)c--;
        else break;
    }
    if(n%2!=0&&c==2)
    {
        cout<<"? "<<n/2+1<<endl;
        cin>>x;
        if(x)c--;
    }
    cout<<"= "<<c<<endl;
}

Compilation message (stderr)

Colors.cpp: In function 'int main()':
Colors.cpp:11:9: warning: unused variable 'p' [-Wunused-variable]
   11 |     int p=1,c=n,x;
      |         ^

• Subtask 1: 9 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33