| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 659990 |
2022-11-20T07:33:30 Z |
jamezzz |
Colors (BOI20_colors) |
C++17 |
|
1 ms |
208 KB |
#include <bits/stdc++.h>
using namespace std;
#define sf scanf
#define pf printf
#define pb push_back
typedef long long ll;
int ask(ll x){
cout<<"? "<<x<<endl;
fflush(stdout);
int a;cin>>a;
return a;
}
void ans(ll x){
cout<<"= "<<x<<endl;
exit(0);
}
int main(){
ll n;cin>>n;
ll lo=1,hi=n,mid,res=-1;
vector<ll> v;
while(lo<=hi){
mid=(lo+hi)>>1;
v.pb(mid);
lo=mid+1;
}
ll cur=1;int m=1;
for(int i=v.size()-1;i>=0;--i){
cur+=m*v[i];
m=-m;
}
ask(cur);
lo=1,hi=n;
while(lo<=hi){
if(lo==hi&&res==-1){
res=lo;
break;
}
mid=(lo+hi)>>1;
cur+=m*mid;
m=-m;
if(ask(cur)==1)res=mid,hi=mid-1;
else lo=mid+1;
}
ans(res);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (4 queries) |
| 2 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
1 ms |
208 KB |
OK (4 queries) |
| 4 |
Correct |
1 ms |
208 KB |
OK (5 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 6 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 8 |
Runtime error |
1 ms |
208 KB |
Execution killed with signal 13 |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (4 queries) |
| 2 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
1 ms |
208 KB |
OK (4 queries) |
| 4 |
Correct |
1 ms |
208 KB |
OK (5 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 6 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 8 |
Runtime error |
1 ms |
208 KB |
Execution killed with signal 13 |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (4 queries) |
| 2 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
1 ms |
208 KB |
OK (4 queries) |
| 4 |
Correct |
1 ms |
208 KB |
OK (5 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 6 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 8 |
Runtime error |
1 ms |
208 KB |
Execution killed with signal 13 |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (4 queries) |
| 2 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
1 ms |
208 KB |
OK (4 queries) |
| 4 |
Correct |
1 ms |
208 KB |
OK (5 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 6 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 8 |
Runtime error |
1 ms |
208 KB |
Execution killed with signal 13 |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (4 queries) |
| 2 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
1 ms |
208 KB |
OK (4 queries) |
| 4 |
Correct |
1 ms |
208 KB |
OK (5 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 6 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
0 ms |
208 KB |
OK (7 queries) |
| 8 |
Runtime error |
1 ms |
208 KB |
Execution killed with signal 13 |
| 9 |
Halted |
0 ms |
0 KB |
- |
