#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
vector<pii> C;
pii m_ask(int i) {
if (C[i].first != -1) return C[i];
auto a = ask(i);
return C[i] = {a[0], a[1]};
}
// 1, 2, 5, 26, 677
int find_best(int n) {
C.assign(n, {-1, -1});
if (n <= 7000) {
for (int i = 0; i < n; ++i) {
auto [a, b] = m_ask(i);
if (a + b == 0) {
return i;
}
}
throw;
}
int B = n / 500;
vector<int> pt;
for (int i = 0; i < n; i += B) {
pt.push_back(i);
}
int t = 0;
for (int i : pt) {
auto [a, b] = m_ask(i);
t = max(t, a + b);
}
auto check = [&](int i) {
auto [a, b] = m_ask(i);
return a + b != t;
};
int jt = 0;
for (int i = 0; i < n; ++i) {
if (check(i)) {
auto [a, b] = m_ask(i);
if (a + b == 0) return i;
} else {
auto same = [&](int j) {
return !check(j) && m_ask(j).second == m_ask(i).second;
};
int st = i, ed = n - 1;
while (pt[jt] <= i) ++jt;
for (int it = jt; it < (int) pt.size(); ++it) {
int j = pt[it];
if (same(j)) {
st = j;
} else {
ed = j;
break;
}
}
while (st < ed) {
int m = (st + ed) / 2;
if (!same(m)) ed = m;
else st = m + 1;
}
i = st - 1;
assert(check(st));
}
}
}
Compilation message
prize.cpp: In function 'int find_best(int)':
prize.cpp:32:14: warning: control reaches end of non-void function [-Wreturn-type]
32 | vector<int> pt;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 2 |
Correct |
6 ms |
1872 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1824 KB |
Output is correct |
| 4 |
Correct |
5 ms |
1824 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1824 KB |
Output is correct |
| 6 |
Correct |
4 ms |
1824 KB |
Output is correct |
| 7 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 8 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 9 |
Correct |
4 ms |
1824 KB |
Output is correct |
| 10 |
Correct |
7 ms |
1872 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
1828 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 3 |
Correct |
4 ms |
1736 KB |
Output is correct |
| 4 |
Correct |
4 ms |
1828 KB |
Output is correct |
| 5 |
Correct |
6 ms |
1820 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1864 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1820 KB |
Output is correct |
| 8 |
Correct |
5 ms |
1828 KB |
Output is correct |
| 9 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 10 |
Correct |
5 ms |
1872 KB |
Output is correct |
| 11 |
Correct |
6 ms |
1832 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1828 KB |
Output is correct |
| 13 |
Correct |
7 ms |
1740 KB |
Output is correct |
| 14 |
Correct |
5 ms |
464 KB |
Output is correct |
| 15 |
Correct |
5 ms |
1824 KB |
Output is correct |
| 16 |
Correct |
27 ms |
1816 KB |
Output is correct |
| 17 |
Correct |
5 ms |
1872 KB |
Output is correct |
| 18 |
Correct |
31 ms |
1872 KB |
Output is correct |
| 19 |
Correct |
7 ms |
1804 KB |
Output is correct |
| 20 |
Correct |
12 ms |
976 KB |
Output is correct |
| 21 |
Correct |
15 ms |
1824 KB |
Output is correct |
| 22 |
Correct |
6 ms |
1816 KB |
Output is correct |
| 23 |
Correct |
5 ms |
1824 KB |
Output is correct |
| 24 |
Correct |
5 ms |
1736 KB |
Output is correct |
| 25 |
Correct |
20 ms |
1824 KB |
Output is correct |
| 26 |
Correct |
17 ms |
1752 KB |
Output is correct |
| 27 |
Correct |
5 ms |
1844 KB |
Output is correct |
| 28 |
Correct |
31 ms |
1872 KB |
Output is correct |
| 29 |
Correct |
29 ms |
1824 KB |
Output is correct |
| 30 |
Correct |
36 ms |
1824 KB |
Output is correct |
| 31 |
Correct |
6 ms |
1872 KB |
Output is correct |
| 32 |
Correct |
4 ms |
1820 KB |
Output is correct |
| 33 |
Correct |
0 ms |
208 KB |
Output is correct |
| 34 |
Correct |
15 ms |
1816 KB |
Output is correct |
| 35 |
Correct |
5 ms |
1832 KB |
Output is correct |
| 36 |
Correct |
7 ms |
1820 KB |
Output is correct |
| 37 |
Correct |
6 ms |
1828 KB |
Output is correct |
| 38 |
Correct |
6 ms |
1832 KB |
Output is correct |
| 39 |
Correct |
10 ms |
1828 KB |
Output is correct |
| 40 |
Correct |
33 ms |
1872 KB |
Output is correct |
| 41 |
Correct |
13 ms |
1868 KB |
Output is correct |
| 42 |
Correct |
30 ms |
1872 KB |
Output is correct |
| 43 |
Correct |
22 ms |
1808 KB |
Output is correct |
| 44 |
Correct |
18 ms |
1828 KB |
Output is correct |
| 45 |
Correct |
19 ms |
1872 KB |
Output is correct |
| 46 |
Correct |
5 ms |
1828 KB |
Output is correct |
| 47 |
Correct |
23 ms |
1872 KB |
Output is correct |
| 48 |
Correct |
30 ms |
1872 KB |
Output is correct |
| 49 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 50 |
Correct |
26 ms |
1744 KB |
Output is correct |
| 51 |
Correct |
16 ms |
1820 KB |
Output is correct |
| 52 |
Correct |
5 ms |
1828 KB |
Output is correct |
| 53 |
Correct |
3 ms |
1864 KB |
Output is correct |
| 54 |
Correct |
19 ms |
1872 KB |
Output is correct |
| 55 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 56 |
Correct |
41 ms |
1812 KB |
Output is correct |
| 57 |
Correct |
32 ms |
1804 KB |
Output is correct |
| 58 |
Correct |
24 ms |
1828 KB |
Output is correct |
| 59 |
Correct |
28 ms |
1872 KB |
Output is correct |
| 60 |
Correct |
24 ms |
1820 KB |
Output is correct |
| 61 |
Correct |
5 ms |
1872 KB |
Output is correct |
| 62 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 63 |
Correct |
5 ms |
1872 KB |
Output is correct |
| 64 |
Correct |
5 ms |
1736 KB |
Output is correct |
| 65 |
Correct |
6 ms |
1872 KB |
Output is correct |
| 66 |
Correct |
10 ms |
1828 KB |
Output is correct |
| 67 |
Correct |
3 ms |
1820 KB |
Output is correct |
| 68 |
Correct |
5 ms |
1832 KB |
Output is correct |
| 69 |
Correct |
11 ms |
1828 KB |
Output is correct |
| 70 |
Correct |
5 ms |
1824 KB |
Output is correct |
| 71 |
Correct |
21 ms |
1872 KB |
Output is correct |
| 72 |
Correct |
10 ms |
1872 KB |
Output is correct |
| 73 |
Correct |
44 ms |
1872 KB |
Output is correct |
| 74 |
Correct |
32 ms |
1872 KB |
Output is correct |
| 75 |
Correct |
8 ms |
1872 KB |
Output is correct |
| 76 |
Correct |
26 ms |
1872 KB |
Output is correct |
| 77 |
Correct |
20 ms |
1828 KB |
Output is correct |
| 78 |
Correct |
7 ms |
1872 KB |
Output is correct |
| 79 |
Correct |
10 ms |
1828 KB |
Output is correct |
| 80 |
Correct |
28 ms |
1872 KB |
Output is correct |
| 81 |
Correct |
42 ms |
1872 KB |
Output is correct |
| 82 |
Correct |
35 ms |
1872 KB |
Output is correct |
| 83 |
Correct |
6 ms |
1828 KB |
Output is correct |
| 84 |
Correct |
31 ms |
1872 KB |
Output is correct |
| 85 |
Correct |
48 ms |
1872 KB |
Output is correct |
| 86 |
Correct |
36 ms |
1872 KB |
Output is correct |
| 87 |
Correct |
7 ms |
1872 KB |
Output is correct |
| 88 |
Correct |
26 ms |
1872 KB |
Output is correct |
| 89 |
Correct |
35 ms |
1872 KB |
Output is correct |
| 90 |
Correct |
7 ms |
1872 KB |
Output is correct |
| 91 |
Correct |
28 ms |
1872 KB |
Output is correct |
| 92 |
Correct |
30 ms |
1872 KB |
Output is correct |
| 93 |
Correct |
39 ms |
1872 KB |
Output is correct |
| 94 |
Correct |
35 ms |
1872 KB |
Output is correct |
| 95 |
Correct |
36 ms |
1872 KB |
Output is correct |
| 96 |
Correct |
33 ms |
1872 KB |
Output is correct |
| 97 |
Correct |
32 ms |
1872 KB |
Output is correct |
