Cod sursa(job #3203639)
Utilizator | Data | 14 februarie 2024 09:25:08 | |
---|---|---|---|
Problema | Cbinteractiv | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.43 kb |
#include <iostream>
using namespace std;
int query(int X) {
cout << "? " << X << endl;
int res;
cin >> res;
return res;
}
int main()
{
int N;
cin >> N;
int left = 1, right = N;
while (left <= right) {
int mid = (left + right) / 2;
if (query(mid) == 1) right = mid - 1;
else left = mid + 1;
}
cout << "! " << left << endl;
return 0;
}