Pagini recente » Diferente pentru onis-2014/runda-2 intre reviziile 4 si 5 | Cod sursa (job #2776374)
#include <bits/stdc++.h>
using namespace std;
void usain_bolt()
{
ios::sync_with_stdio(false);
cin.tie(0);
}
int main()
{
//usain_bolt();
int n;
cin >> n;
int left = 1, right = n;
while(left <= right) {
int mid = (left + right) >> 1;
cout << "?" << " " << mid << "\n";
fflush(stdout);
int ans;
cin >> ans;
if(ans == 0) {
left = mid + 1;
}
else if(ans == 1) {
right = mid;
}
else {
return 0;
}
}
cout << "!" << " " << left;
return 0;
}