#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
template<typename T>
using Prior = priority_queue<T>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;
#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back
int count_mushrooms(int n) {
srand(time(NULL));
const int B = (int)floor(sqrt(4 * n + 0.5));
vector<int> m{0};
// cout << "Block size = " << B << "\n";
if (n <= 227) {
for (int i = 1; i < n; ++i) {
m.eb(m.back() ^ use_machine({i-1, i}));
}
return n - accumulate(ALL(m), 0);
}
int ret;
vector<int> tA{0}, tB;
m.eb(m.back() ^ use_machine({0, 1}));
m.back() ? tB.eb(1) : tA.eb(1);
m.eb(m.back() ^ use_machine({1, 2}));
m.back() ? tB.eb(2) : tA.eb(2);
if (tA.size() >= 2) {
ret = use_machine({tA[0], 3, tA[1], 4});
ret & 2 ? tB.eb(3) : tA.eb(3);
ret & 1 ? tB.eb(4) : tA.eb(4);
}
else {
ret = use_machine({tB[0], 3, tB[1], 4});
ret & 2 ? tA.eb(3) : tB.eb(3);
ret & 1 ? tA.eb(4) : tB.eb(4);
}
for (int i = 5; i < B;) {
int fl = tA.size() >= 3 ? 1 : 0;
if (tA.size() >= 3 and tB.size() >= 3) fl = rand() & 1;
if (fl) {
ret = use_machine({tA[0], i, tA[1], i+1, tA[2], i+2});
ret & 1 ? tB.eb(i+2) : tA.eb(i+2);
if (ret & 2) {
ret = use_machine({tA[0], i+3, tA[1], i, tA[2], i+1});
ret & 1 ? tB.eb(i+1), tA.eb(i) : tA.eb(i+1), tB.eb(i);
ret >= 3 ? tB.eb(i+3) : tA.eb(i+3);
i += 4;
}
else {
if (ret & 4) tB.eb(i), tB.eb(i+1);
else tA.eb(i), tA.eb(i+1);
i += 3;
}
}
else {
ret = use_machine({tB[0], i, tB[1], i+1, tB[2], i+2});
ret & 1 ? tA.eb(i+2) : tB.eb(i+2);
if (ret & 2) {
ret = use_machine({tB[0], i+3, tB[1], i, tB[2], i+1});
ret & 1 ? tA.eb(i+1), tB.eb(i) : tB.eb(i+1), tA.eb(i);
ret >= 3 ? tA.eb(i+3) : tB.eb(i+3);
i += 4;
}
else {
if (ret & 4) tA.eb(i), tA.eb(i+1);
else tB.eb(i), tB.eb(i+1);
i += 3;
}
}
}
sort(ALL(tA)), sort(ALL(tB));
// cout << "tA : "; for (auto x : tA) cout << x << " "; cout << "\n";
// cout << "tB : "; for (auto x : tB) cout << x << " "; cout << "\n";
int ans = tA.size(), tok = max(tA.size() ? tA.back() : 0LL,
tB.size() ? tB.back() : 0LL) + 1;
while (tok < n) {
if (tA.size() >= tB.size()) {
/// 0 x 0 x 0 x 0 ... 0 x 0 x ///
int sz = tA.size();
vector<int> tmp;
for (int i = 0; i < sz and tok < n; ++i) {
tmp.eb(tA[i]), tmp.eb(tok++);
}
ret = use_machine(tmp);
ans += tmp.size() / 2 - (ret + 1) / 2;
if (~ret & 1) tA.eb(tok - 1);
else tB.eb(tok - 1);
}
else if (tB.size() > tA.size()) {
/// 1 x 1 x 1 x 1 ... 1 x 1 x ///
int sz = tB.size();
vector<int> tmp;
for (int i = 0; i < sz and tok < n; ++i) {
tmp.eb(tB[i]), tmp.eb(tok++);
}
ret = use_machine(tmp);
ans += (ret + 1) / 2;
if (ret & 1) tA.eb(tok - 1);
else tB.eb(tok - 1);
}
}
return ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
256 KB |
Output is correct |
| 2 |
Correct |
0 ms |
256 KB |
Output is correct |
| 3 |
Correct |
1 ms |
256 KB |
Output is correct |
| 4 |
Correct |
1 ms |
256 KB |
Output is correct |
| 5 |
Correct |
2 ms |
256 KB |
Output is correct |
| 6 |
Incorrect |
2 ms |
256 KB |
Answer is not correct. |
| 7 |
Halted |
0 ms |
0 KB |
- |
