// Online C++ compiler to run C++ program online
#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
cin>>n;
if(n==1){
cout<<"= "<<1<<endl;
return 0;
}
bool r=0;
int mid=(n/2)+1;
cout<<"? "<<mid<<endl;
cin>>r;
cout<<"? "<<1<<endl;
cin>>r;
if(r==0){
int a=1,b=n+1;
int i=0;
while((b-a)>mid){
if(i){
a++;
cout<<"? "<<a<<endl;
cin>>r;
if(r==0)
break;
}
else{
b--;
cout<<"? "<<b<<endl;
cin>>r;
if(r==0)
break;
}
i^=1;
}
cout<<"= "<<(b-a)+!r<<endl;
}
else{
int a=1,b=mid;
if(b==2){
cout<<"= "<<1<<endl;
return 0;
}
for(int i=2;i<mid;i++){
if(i%2){
a++;
cout<<"? "<<a<<endl;
cin>>r;
if(r==0)
break;
}
else{
b--;
cout<<"? "<<b<<endl;
cin>>r;
if(r==0)
break;
}
}
cout<<"= "<<(b-a)+!r<<endl;
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
OK (5 queries) |
| 2 |
Correct |
0 ms |
344 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 4 |
Correct |
0 ms |
344 KB |
OK (14 queries) |
| 5 |
Correct |
0 ms |
344 KB |
OK (13 queries) |
| 6 |
Correct |
0 ms |
344 KB |
OK (27 queries) |
| 7 |
Correct |
0 ms |
344 KB |
OK (18 queries) |
| 8 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 9 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 10 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 11 |
Correct |
1 ms |
344 KB |
OK (5 queries) |
| 12 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 13 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 14 |
Correct |
0 ms |
344 KB |
OK (17 queries) |
| 15 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 16 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 17 |
Correct |
0 ms |
344 KB |
OK (3 queries) |
| 18 |
Correct |
1 ms |
344 KB |
OK (17 queries) |
| 19 |
Correct |
0 ms |
344 KB |
OK (4 queries) |
| 20 |
Correct |
0 ms |
344 KB |
OK (32 queries) |
| 21 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 22 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to 3, violates the range [1, 2] |
| 23 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
OK (5 queries) |
| 2 |
Correct |
0 ms |
344 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 4 |
Correct |
0 ms |
344 KB |
OK (14 queries) |
| 5 |
Correct |
0 ms |
344 KB |
OK (13 queries) |
| 6 |
Correct |
0 ms |
344 KB |
OK (27 queries) |
| 7 |
Correct |
0 ms |
344 KB |
OK (18 queries) |
| 8 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 9 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 10 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 11 |
Correct |
1 ms |
344 KB |
OK (5 queries) |
| 12 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 13 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 14 |
Correct |
0 ms |
344 KB |
OK (17 queries) |
| 15 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 16 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 17 |
Correct |
0 ms |
344 KB |
OK (3 queries) |
| 18 |
Correct |
1 ms |
344 KB |
OK (17 queries) |
| 19 |
Correct |
0 ms |
344 KB |
OK (4 queries) |
| 20 |
Correct |
0 ms |
344 KB |
OK (32 queries) |
| 21 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 22 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to 3, violates the range [1, 2] |
| 23 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
OK (5 queries) |
| 2 |
Correct |
0 ms |
344 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 4 |
Correct |
0 ms |
344 KB |
OK (14 queries) |
| 5 |
Correct |
0 ms |
344 KB |
OK (13 queries) |
| 6 |
Correct |
0 ms |
344 KB |
OK (27 queries) |
| 7 |
Correct |
0 ms |
344 KB |
OK (18 queries) |
| 8 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 9 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 10 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 11 |
Correct |
1 ms |
344 KB |
OK (5 queries) |
| 12 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 13 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 14 |
Correct |
0 ms |
344 KB |
OK (17 queries) |
| 15 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 16 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 17 |
Correct |
0 ms |
344 KB |
OK (3 queries) |
| 18 |
Correct |
1 ms |
344 KB |
OK (17 queries) |
| 19 |
Correct |
0 ms |
344 KB |
OK (4 queries) |
| 20 |
Correct |
0 ms |
344 KB |
OK (32 queries) |
| 21 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 22 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to 3, violates the range [1, 2] |
| 23 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
OK (5 queries) |
| 2 |
Correct |
0 ms |
344 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 4 |
Correct |
0 ms |
344 KB |
OK (14 queries) |
| 5 |
Correct |
0 ms |
344 KB |
OK (13 queries) |
| 6 |
Correct |
0 ms |
344 KB |
OK (27 queries) |
| 7 |
Correct |
0 ms |
344 KB |
OK (18 queries) |
| 8 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 9 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 10 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 11 |
Correct |
1 ms |
344 KB |
OK (5 queries) |
| 12 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 13 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 14 |
Correct |
0 ms |
344 KB |
OK (17 queries) |
| 15 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 16 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 17 |
Correct |
0 ms |
344 KB |
OK (3 queries) |
| 18 |
Correct |
1 ms |
344 KB |
OK (17 queries) |
| 19 |
Correct |
0 ms |
344 KB |
OK (4 queries) |
| 20 |
Correct |
0 ms |
344 KB |
OK (32 queries) |
| 21 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 22 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to 3, violates the range [1, 2] |
| 23 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
OK (5 queries) |
| 2 |
Correct |
0 ms |
344 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 4 |
Correct |
0 ms |
344 KB |
OK (14 queries) |
| 5 |
Correct |
0 ms |
344 KB |
OK (13 queries) |
| 6 |
Correct |
0 ms |
344 KB |
OK (27 queries) |
| 7 |
Correct |
0 ms |
344 KB |
OK (18 queries) |
| 8 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 9 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 10 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 11 |
Correct |
1 ms |
344 KB |
OK (5 queries) |
| 12 |
Correct |
0 ms |
344 KB |
OK (6 queries) |
| 13 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 14 |
Correct |
0 ms |
344 KB |
OK (17 queries) |
| 15 |
Correct |
0 ms |
344 KB |
OK (12 queries) |
| 16 |
Correct |
0 ms |
344 KB |
OK (8 queries) |
| 17 |
Correct |
0 ms |
344 KB |
OK (3 queries) |
| 18 |
Correct |
1 ms |
344 KB |
OK (17 queries) |
| 19 |
Correct |
0 ms |
344 KB |
OK (4 queries) |
| 20 |
Correct |
0 ms |
344 KB |
OK (32 queries) |
| 21 |
Correct |
0 ms |
344 KB |
OK (10 queries) |
| 22 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to 3, violates the range [1, 2] |
| 23 |
Halted |
0 ms |
0 KB |
- |
