#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
int n; cin>>n;
int ans=-1;
for (int i=n; i>=1; i--) {
for (int j=1; j+i-1<=n; j++) {
cout<<"? "<<j<<" "<<j+i-1<<endl;
cout.flush();
int res; cin>>res;
if (res==1) {
ans=i;
break;
}
}
if (ans!=-1) break;
}
cout<<"! "<<ans<<endl;
cout.flush();
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
1067 ms |
412 KB |
Execution killed with signal 13 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
1067 ms |
412 KB |
Execution killed with signal 13 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
988 ms |
416 KB |
Execution killed with signal 13 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
1067 ms |
412 KB |
Execution killed with signal 13 |
2 |
Halted |
0 ms |
0 KB |
- |