#include <cassert>
#include <iostream>
#include <vector>
using namespace std;
const int N = 2e5 + 2;
vector<int> cache[N];
vector<int> lv(1, 1);
int sumUpper = 0;
vector<int> ask(int i);
int countQuery = 0;
vector<int> Ask(int i)
{
assert(++countQuery <= 10000);
return ask(i);
}
inline bool Type(int i) { return cache[i][0] + cache[i][1] == sumUpper; }
int Solve(int l, int r, int cntL, int cntR)
{
int cur = sumUpper - cntL - cntR;
if (l > r || cur == 0) return -1;
int i = (l + r) / 2;
while (true)
{
if (cache[i].empty()) cache[i] = Ask(i);
if (cache[i][0] + cache[i][1] == 0) return i;
if (Type(i))
return max(Solve(l, i - 1, cntL, cache[i][1]), Solve(i + 1, r, cache[i][0], cntR));
if (i == r) return Solve(l, (l + r) / 2 - 1, cntL, cntR + r - (l + r) / 2 + 1);
++i;
}
return -1;
}
int find_best(int n)
{
for (int i = 1, sum = 1; ; ++i)
{
int nex = lv.back() * lv.back() + 1;
if (sum + nex + (long long) nex * nex + 1 <= n)
{
lv.push_back(nex);
sum += nex * nex;
}
else
{
int &cur = lv.back();
while (sum + 1 + (cur + 1) * (cur + 1) + 1 <= n) ++cur;
break;
}
}
int upp = 1;
for (int i = 0; i < (int) lv.size(); ++i)
upp += lv[i];
for (int i = 0; i < n; ++i)
if ((i + 1) % (n / upp) == 0)
{
cache[i] = Ask(i);
sumUpper = max(sumUpper, cache[i][0] + cache[i][1]);
}
int last = -1, sumL = 0;
for (int i = 0, need = 0; i < n; ++i)
{
if (!cache[i].empty() && cache[i][0] + cache[i][1] == 0) return i;
need += (i + 1) % (n / upp) == 0;
need -= !cache[i].empty() && Type(i);
if (need && cache[i].empty())
{
cache[i] = Ask(i);
--need;
}
if (!cache[i].empty() && Type(i))
{
int solved = Solve(last + 1, i - 1, sumL, cache[i][1]);
if (solved != -1) return solved;
last = i;
sumL = cache[i][0];
}
}
return Solve(last + 1, n - 1, sumL, 0);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
4984 KB |
Output is correct |
| 2 |
Correct |
9 ms |
5048 KB |
Output is correct |
| 3 |
Correct |
14 ms |
5084 KB |
Output is correct |
| 4 |
Correct |
17 ms |
5256 KB |
Output is correct |
| 5 |
Correct |
13 ms |
5256 KB |
Output is correct |
| 6 |
Correct |
10 ms |
5256 KB |
Output is correct |
| 7 |
Correct |
11 ms |
5260 KB |
Output is correct |
| 8 |
Correct |
11 ms |
5260 KB |
Output is correct |
| 9 |
Correct |
12 ms |
5260 KB |
Output is correct |
| 10 |
Correct |
12 ms |
5260 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
5260 KB |
Output is correct |
| 2 |
Correct |
14 ms |
5260 KB |
Output is correct |
| 3 |
Correct |
15 ms |
5260 KB |
Output is correct |
| 4 |
Correct |
11 ms |
5284 KB |
Output is correct |
| 5 |
Correct |
15 ms |
5284 KB |
Output is correct |
| 6 |
Correct |
10 ms |
5372 KB |
Output is correct |
| 7 |
Correct |
15 ms |
5372 KB |
Output is correct |
| 8 |
Correct |
17 ms |
5372 KB |
Output is correct |
| 9 |
Correct |
12 ms |
5372 KB |
Output is correct |
| 10 |
Correct |
11 ms |
5372 KB |
Output is correct |
| 11 |
Correct |
11 ms |
5372 KB |
Output is correct |
| 12 |
Correct |
10 ms |
5372 KB |
Output is correct |
| 13 |
Correct |
15 ms |
5372 KB |
Output is correct |
| 14 |
Correct |
7 ms |
5372 KB |
Output is correct |
| 15 |
Correct |
15 ms |
5372 KB |
Output is correct |
| 16 |
Correct |
40 ms |
5384 KB |
Output is correct |
| 17 |
Correct |
10 ms |
5384 KB |
Output is correct |
| 18 |
Correct |
49 ms |
5384 KB |
Output is correct |
| 19 |
Correct |
9 ms |
5384 KB |
Output is correct |
| 20 |
Correct |
20 ms |
5384 KB |
Output is correct |
| 21 |
Correct |
24 ms |
5384 KB |
Output is correct |
| 22 |
Correct |
13 ms |
5384 KB |
Output is correct |
| 23 |
Correct |
12 ms |
5384 KB |
Output is correct |
| 24 |
Correct |
12 ms |
5384 KB |
Output is correct |
| 25 |
Correct |
28 ms |
5384 KB |
Output is correct |
| 26 |
Correct |
34 ms |
5384 KB |
Output is correct |
| 27 |
Correct |
14 ms |
5384 KB |
Output is correct |
| 28 |
Correct |
40 ms |
5384 KB |
Output is correct |
| 29 |
Correct |
52 ms |
5384 KB |
Output is correct |
| 30 |
Correct |
46 ms |
5400 KB |
Output is correct |
| 31 |
Correct |
11 ms |
5400 KB |
Output is correct |
| 32 |
Correct |
19 ms |
5400 KB |
Output is correct |
| 33 |
Correct |
5 ms |
5400 KB |
Output is correct |
| 34 |
Correct |
19 ms |
5400 KB |
Output is correct |
| 35 |
Correct |
11 ms |
5400 KB |
Output is correct |
| 36 |
Correct |
18 ms |
5400 KB |
Output is correct |
| 37 |
Correct |
13 ms |
5400 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5400 KB |
Output is correct |
| 39 |
Correct |
35 ms |
5400 KB |
Output is correct |
| 40 |
Correct |
56 ms |
5400 KB |
Output is correct |
| 41 |
Correct |
37 ms |
5400 KB |
Output is correct |
| 42 |
Correct |
40 ms |
5400 KB |
Output is correct |
| 43 |
Correct |
44 ms |
5400 KB |
Output is correct |
| 44 |
Correct |
28 ms |
5400 KB |
Output is correct |
| 45 |
Correct |
28 ms |
5400 KB |
Output is correct |
| 46 |
Correct |
11 ms |
5400 KB |
Output is correct |
| 47 |
Correct |
29 ms |
5400 KB |
Output is correct |
| 48 |
Correct |
36 ms |
5472 KB |
Output is correct |
| 49 |
Correct |
16 ms |
5472 KB |
Output is correct |
| 50 |
Correct |
25 ms |
5472 KB |
Output is correct |
| 51 |
Correct |
26 ms |
5472 KB |
Output is correct |
| 52 |
Correct |
11 ms |
5472 KB |
Output is correct |
| 53 |
Correct |
20 ms |
5472 KB |
Output is correct |
| 54 |
Correct |
25 ms |
5472 KB |
Output is correct |
| 55 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 56 |
Correct |
46 ms |
5472 KB |
Output is correct |
| 57 |
Correct |
54 ms |
5472 KB |
Output is correct |
| 58 |
Correct |
35 ms |
5472 KB |
Output is correct |
| 59 |
Correct |
46 ms |
5472 KB |
Output is correct |
| 60 |
Correct |
40 ms |
5472 KB |
Output is correct |
| 61 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 62 |
Correct |
11 ms |
5472 KB |
Output is correct |
| 63 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 64 |
Correct |
10 ms |
5472 KB |
Output is correct |
| 65 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 66 |
Correct |
11 ms |
5472 KB |
Output is correct |
| 67 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 68 |
Correct |
10 ms |
5472 KB |
Output is correct |
| 69 |
Correct |
18 ms |
5472 KB |
Output is correct |
| 70 |
Correct |
14 ms |
5472 KB |
Output is correct |
| 71 |
Correct |
43 ms |
5472 KB |
Output is correct |
| 72 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 73 |
Correct |
46 ms |
5472 KB |
Output is correct |
| 74 |
Correct |
37 ms |
5472 KB |
Output is correct |
| 75 |
Correct |
11 ms |
5472 KB |
Output is correct |
| 76 |
Correct |
34 ms |
5472 KB |
Output is correct |
| 77 |
Correct |
45 ms |
5472 KB |
Output is correct |
| 78 |
Correct |
14 ms |
5472 KB |
Output is correct |
| 79 |
Correct |
24 ms |
5472 KB |
Output is correct |
| 80 |
Correct |
51 ms |
5472 KB |
Output is correct |
| 81 |
Correct |
51 ms |
5472 KB |
Output is correct |
| 82 |
Correct |
40 ms |
5472 KB |
Output is correct |
| 83 |
Correct |
13 ms |
5472 KB |
Output is correct |
| 84 |
Correct |
52 ms |
5472 KB |
Output is correct |
| 85 |
Correct |
39 ms |
5472 KB |
Output is correct |
| 86 |
Correct |
34 ms |
5472 KB |
Output is correct |
| 87 |
Correct |
12 ms |
5472 KB |
Output is correct |
| 88 |
Correct |
33 ms |
5472 KB |
Output is correct |
| 89 |
Correct |
31 ms |
5472 KB |
Output is correct |
| 90 |
Correct |
12 ms |
5472 KB |
Output is correct |
| 91 |
Correct |
28 ms |
5472 KB |
Output is correct |
| 92 |
Correct |
37 ms |
5472 KB |
Output is correct |
| 93 |
Correct |
37 ms |
5472 KB |
Output is correct |
| 94 |
Correct |
46 ms |
5472 KB |
Output is correct |
| 95 |
Correct |
45 ms |
5472 KB |
Output is correct |
| 96 |
Correct |
58 ms |
5472 KB |
Output is correct |
| 97 |
Correct |
51 ms |
5472 KB |
Output is correct |
