#include <bits/stdc++.h>
#include "prize.h"
//#include "Lgrader.cpp"
using namespace std;
template<class T, class T2> inline int chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline int chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const int MAXN = (1 << 20);
vector<int> memo[MAXN];
int Q = 0;
bool stop;
bool dummy[MAXN];
vector<int> query(int i)
{
if(!memo[i].empty()) return memo[i];
if(stop || dummy[i]) return vector<int>(2, 1e9);
memo[i] = ask(i), Q++;
if(Q == 10000) assert(false);
return memo[i];
}
int n;
mt19937 mt(42);
bool useless(int l, int r)
{
if(query(l)[1] - query(r)[1] == 0) return true;
//if(query(r)[0] - query(l)[0] == 0) return true;
return false;
}
int cnt(int l, int r) { return query(l)[1] - query(r)[1]; }
void rec(int l, int r)
{
if(r < l) return;
int mid = (l + r) >> 1;
if(query(l - 1)[0] + query(l - 1)[1] == 0) stop = 1;
if(query(mid)[0] + query(mid)[1] == 0) stop = 1;
if(query(r + 1)[0] + query(r + 1)[1] == 0) stop = 1;
if(useless(l - 1, r + 1))
{
for(int i = l; i <= r; i++)
memo[i] = query(l - 1);
return;
}
if(cnt(l - 1, mid) > cnt(mid, r + 1))
{
if(useless(l - 1, mid))
for(int i = l; i < mid; i++)
dummy[i] = 1;
else
rec(l, mid - 1);
if(useless(mid, r + 1))
for(int i = mid + 1; i <= r; i++)
dummy[i] = 1;
else
rec(mid + 1, r);
}
else
{
if(useless(mid, r + 1))
for(int i = mid + 1; i <= r; i++)
dummy[i] = 1;
else
rec(mid + 1, r);
if(useless(l - 1, mid))
for(int i = l; i < mid; i++)
dummy[i] = 1;
else
rec(l, mid - 1);
}
}
const int B = 500;
int find_best(int n)
{
::n = n;
if(n < 1000)
rec(1, n - 2);
else
{
int l = 0;
while(l < n)
{
int r = min(n - 1, l + B - 1);
if(!useless(l, r))
rec(l + 1, r - 1);
else
for(int i = l; i <= r; i++)
dummy[i] = 1;
l += B;
}
}
for(int i = 0; i < n; i++)
if(query(i)[0] + query(i)[1] == 0)
return i;
return -1;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
27 ms |
25080 KB |
Output is correct |
| 2 |
Correct |
39 ms |
25144 KB |
Output is correct |
| 3 |
Correct |
34 ms |
25192 KB |
Output is correct |
| 4 |
Correct |
45 ms |
25220 KB |
Output is correct |
| 5 |
Correct |
52 ms |
25220 KB |
Output is correct |
| 6 |
Correct |
30 ms |
25296 KB |
Output is correct |
| 7 |
Correct |
38 ms |
25372 KB |
Output is correct |
| 8 |
Correct |
40 ms |
25372 KB |
Output is correct |
| 9 |
Correct |
36 ms |
25372 KB |
Output is correct |
| 10 |
Correct |
51 ms |
25372 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
28 ms |
25372 KB |
Output is correct |
| 2 |
Correct |
38 ms |
25372 KB |
Output is correct |
| 3 |
Correct |
34 ms |
25372 KB |
Output is correct |
| 4 |
Correct |
45 ms |
25396 KB |
Output is correct |
| 5 |
Correct |
46 ms |
25404 KB |
Output is correct |
| 6 |
Correct |
36 ms |
25404 KB |
Output is correct |
| 7 |
Correct |
51 ms |
25404 KB |
Output is correct |
| 8 |
Correct |
42 ms |
25404 KB |
Output is correct |
| 9 |
Correct |
41 ms |
25404 KB |
Output is correct |
| 10 |
Correct |
56 ms |
25404 KB |
Output is correct |
| 11 |
Correct |
42 ms |
25404 KB |
Output is correct |
| 12 |
Correct |
28 ms |
25404 KB |
Output is correct |
| 13 |
Correct |
57 ms |
25416 KB |
Output is correct |
| 14 |
Correct |
27 ms |
25416 KB |
Output is correct |
| 15 |
Correct |
34 ms |
25416 KB |
Output is correct |
| 16 |
Correct |
84 ms |
25448 KB |
Output is correct |
| 17 |
Correct |
24 ms |
25448 KB |
Output is correct |
| 18 |
Partially correct |
85 ms |
25532 KB |
Partially correct - number of queries: 5403 |
| 19 |
Correct |
24 ms |
25532 KB |
Output is correct |
| 20 |
Correct |
51 ms |
25532 KB |
Output is correct |
| 21 |
Correct |
47 ms |
25532 KB |
Output is correct |
| 22 |
Correct |
27 ms |
25532 KB |
Output is correct |
| 23 |
Correct |
26 ms |
25532 KB |
Output is correct |
| 24 |
Correct |
24 ms |
25532 KB |
Output is correct |
| 25 |
Correct |
50 ms |
25532 KB |
Output is correct |
| 26 |
Correct |
52 ms |
25532 KB |
Output is correct |
| 27 |
Correct |
28 ms |
25532 KB |
Output is correct |
| 28 |
Correct |
79 ms |
25532 KB |
Output is correct |
| 29 |
Correct |
82 ms |
25532 KB |
Output is correct |
| 30 |
Partially correct |
82 ms |
25552 KB |
Partially correct - number of queries: 5415 |
| 31 |
Correct |
23 ms |
25552 KB |
Output is correct |
| 32 |
Correct |
38 ms |
25552 KB |
Output is correct |
| 33 |
Correct |
21 ms |
25552 KB |
Output is correct |
| 34 |
Correct |
45 ms |
25552 KB |
Output is correct |
| 35 |
Correct |
38 ms |
25552 KB |
Output is correct |
| 36 |
Correct |
35 ms |
25552 KB |
Output is correct |
| 37 |
Correct |
28 ms |
25552 KB |
Output is correct |
| 38 |
Correct |
25 ms |
25552 KB |
Output is correct |
| 39 |
Correct |
40 ms |
25552 KB |
Output is correct |
| 40 |
Correct |
83 ms |
25552 KB |
Output is correct |
| 41 |
Correct |
61 ms |
25552 KB |
Output is correct |
| 42 |
Correct |
66 ms |
25552 KB |
Output is correct |
| 43 |
Correct |
72 ms |
25552 KB |
Output is correct |
| 44 |
Correct |
54 ms |
25552 KB |
Output is correct |
| 45 |
Correct |
49 ms |
25552 KB |
Output is correct |
| 46 |
Correct |
23 ms |
25552 KB |
Output is correct |
| 47 |
Correct |
47 ms |
25552 KB |
Output is correct |
| 48 |
Correct |
74 ms |
25552 KB |
Output is correct |
| 49 |
Correct |
27 ms |
25552 KB |
Output is correct |
| 50 |
Partially correct |
94 ms |
25612 KB |
Partially correct - number of queries: 5375 |
| 51 |
Correct |
46 ms |
25612 KB |
Output is correct |
| 52 |
Correct |
23 ms |
25612 KB |
Output is correct |
| 53 |
Correct |
53 ms |
25612 KB |
Output is correct |
| 54 |
Correct |
45 ms |
25612 KB |
Output is correct |
| 55 |
Correct |
28 ms |
25612 KB |
Output is correct |
| 56 |
Partially correct |
85 ms |
25612 KB |
Partially correct - number of queries: 5435 |
| 57 |
Correct |
61 ms |
25612 KB |
Output is correct |
| 58 |
Correct |
67 ms |
25612 KB |
Output is correct |
| 59 |
Correct |
60 ms |
25612 KB |
Output is correct |
| 60 |
Correct |
44 ms |
25612 KB |
Output is correct |
| 61 |
Correct |
47 ms |
25612 KB |
Output is correct |
| 62 |
Correct |
25 ms |
25612 KB |
Output is correct |
| 63 |
Correct |
43 ms |
25612 KB |
Output is correct |
| 64 |
Correct |
34 ms |
25612 KB |
Output is correct |
| 65 |
Correct |
43 ms |
25612 KB |
Output is correct |
| 66 |
Correct |
44 ms |
25612 KB |
Output is correct |
| 67 |
Correct |
44 ms |
25612 KB |
Output is correct |
| 68 |
Correct |
23 ms |
25612 KB |
Output is correct |
| 69 |
Correct |
44 ms |
25612 KB |
Output is correct |
| 70 |
Correct |
47 ms |
25612 KB |
Output is correct |
| 71 |
Correct |
88 ms |
25612 KB |
Output is correct |
| 72 |
Correct |
51 ms |
25612 KB |
Output is correct |
| 73 |
Correct |
95 ms |
25612 KB |
Output is correct |
| 74 |
Correct |
112 ms |
25612 KB |
Output is correct |
| 75 |
Correct |
50 ms |
25612 KB |
Output is correct |
| 76 |
Correct |
78 ms |
25612 KB |
Output is correct |
| 77 |
Partially correct |
85 ms |
25612 KB |
Partially correct - number of queries: 5433 |
| 78 |
Correct |
47 ms |
25612 KB |
Output is correct |
| 79 |
Correct |
63 ms |
25612 KB |
Output is correct |
| 80 |
Partially correct |
86 ms |
25612 KB |
Partially correct - number of queries: 5455 |
| 81 |
Partially correct |
123 ms |
25612 KB |
Partially correct - number of queries: 5407 |
| 82 |
Partially correct |
113 ms |
25612 KB |
Partially correct - number of queries: 5415 |
| 83 |
Correct |
47 ms |
25612 KB |
Output is correct |
| 84 |
Correct |
80 ms |
25612 KB |
Output is correct |
| 85 |
Partially correct |
80 ms |
25612 KB |
Partially correct - number of queries: 5371 |
| 86 |
Correct |
52 ms |
25612 KB |
Output is correct |
| 87 |
Correct |
43 ms |
25612 KB |
Output is correct |
| 88 |
Correct |
53 ms |
25612 KB |
Output is correct |
| 89 |
Correct |
46 ms |
25612 KB |
Output is correct |
| 90 |
Correct |
42 ms |
25612 KB |
Output is correct |
| 91 |
Correct |
44 ms |
25612 KB |
Output is correct |
| 92 |
Correct |
56 ms |
25612 KB |
Output is correct |
| 93 |
Correct |
51 ms |
25612 KB |
Output is correct |
| 94 |
Correct |
56 ms |
25612 KB |
Output is correct |
| 95 |
Correct |
45 ms |
25612 KB |
Output is correct |
| 96 |
Correct |
45 ms |
25612 KB |
Output is correct |
| 97 |
Correct |
52 ms |
25612 KB |
Output is correct |
