#include<bits/stdc++.h>
#define int long long
using namespace std;
int R[2][200000];
int32_t main()
{
//cin.tie(0);
//cout.tie(0);
//ios_base::sync_with_stdio(0);
int n;
cin>>n;
int maxx=0;
int ile=0;
for(int j=0;j<=1;j++)
{
R[j][0]=0;
int rp=0;
int i=1;
while(i<=n)
{
while(i-rp-1>=1 && i+j+rp<=n)
{
if(ile>=200000)
while(true)
ile++;
cout<<"? "<<i-rp-1<<" "<<i+j+rp<<"\n";
ile++;
int co;
cin>>co;
if(co==1)
rp++;
else break;
}
R[j][i]=rp;
int k=1;
while((R[j][i-k]!=rp-k)&&(k<rp))
{
R[j][i+k]=min(R[j][i-k],rp-k);
k++;
}
rp=max(rp-k,0LL);
i+=k;
}
}
for(int i=0;i<=1;i++)
for(int j=0;j<=n;j++)
maxx=max(maxx,R[i][j]*2+i);
cout<<"! "<<maxx;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
133 ms |
468 KB |
Output is correct |
2 |
Correct |
122 ms |
316 KB |
Output is correct |
3 |
Correct |
98 ms |
312 KB |
Output is correct |
4 |
Correct |
181 ms |
572 KB |
Output is correct |
5 |
Correct |
182 ms |
320 KB |
Output is correct |
6 |
Correct |
144 ms |
556 KB |
Output is correct |
7 |
Correct |
117 ms |
304 KB |
Output is correct |
8 |
Correct |
169 ms |
496 KB |
Output is correct |
9 |
Correct |
147 ms |
416 KB |
Output is correct |
10 |
Correct |
114 ms |
476 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
133 ms |
468 KB |
Output is correct |
2 |
Correct |
122 ms |
316 KB |
Output is correct |
3 |
Correct |
98 ms |
312 KB |
Output is correct |
4 |
Correct |
181 ms |
572 KB |
Output is correct |
5 |
Correct |
182 ms |
320 KB |
Output is correct |
6 |
Correct |
144 ms |
556 KB |
Output is correct |
7 |
Correct |
117 ms |
304 KB |
Output is correct |
8 |
Correct |
169 ms |
496 KB |
Output is correct |
9 |
Correct |
147 ms |
416 KB |
Output is correct |
10 |
Correct |
114 ms |
476 KB |
Output is correct |
11 |
Correct |
1162 ms |
1272 KB |
Output is correct |
12 |
Correct |
714 ms |
1292 KB |
Output is correct |
13 |
Correct |
932 ms |
1292 KB |
Output is correct |
14 |
Correct |
1012 ms |
1256 KB |
Output is correct |
15 |
Correct |
1022 ms |
1328 KB |
Output is correct |
16 |
Correct |
1192 ms |
1304 KB |
Output is correct |
17 |
Correct |
1317 ms |
1300 KB |
Output is correct |
18 |
Correct |
930 ms |
1276 KB |
Output is correct |
19 |
Correct |
1187 ms |
1432 KB |
Output is correct |
20 |
Correct |
1025 ms |
1268 KB |
Output is correct |
21 |
Correct |
1000 ms |
1456 KB |
Output is correct |
22 |
Correct |
688 ms |
1308 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
5008 ms |
1432 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
133 ms |
468 KB |
Output is correct |
2 |
Correct |
122 ms |
316 KB |
Output is correct |
3 |
Correct |
98 ms |
312 KB |
Output is correct |
4 |
Correct |
181 ms |
572 KB |
Output is correct |
5 |
Correct |
182 ms |
320 KB |
Output is correct |
6 |
Correct |
144 ms |
556 KB |
Output is correct |
7 |
Correct |
117 ms |
304 KB |
Output is correct |
8 |
Correct |
169 ms |
496 KB |
Output is correct |
9 |
Correct |
147 ms |
416 KB |
Output is correct |
10 |
Correct |
114 ms |
476 KB |
Output is correct |
11 |
Correct |
1162 ms |
1272 KB |
Output is correct |
12 |
Correct |
714 ms |
1292 KB |
Output is correct |
13 |
Correct |
932 ms |
1292 KB |
Output is correct |
14 |
Correct |
1012 ms |
1256 KB |
Output is correct |
15 |
Correct |
1022 ms |
1328 KB |
Output is correct |
16 |
Correct |
1192 ms |
1304 KB |
Output is correct |
17 |
Correct |
1317 ms |
1300 KB |
Output is correct |
18 |
Correct |
930 ms |
1276 KB |
Output is correct |
19 |
Correct |
1187 ms |
1432 KB |
Output is correct |
20 |
Correct |
1025 ms |
1268 KB |
Output is correct |
21 |
Correct |
1000 ms |
1456 KB |
Output is correct |
22 |
Correct |
688 ms |
1308 KB |
Output is correct |
23 |
Execution timed out |
5008 ms |
1432 KB |
Time limit exceeded |
24 |
Halted |
0 ms |
0 KB |
- |