| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1314134 | mikolaj00 | Minerals (JOI19_minerals) | C++20 | 0 ms | 0 KiB |
#include <cstdio>
#include <cstdlib>
#include <vector>
#include "minerals.h"
using namespace std;
#define DEBUG true
vector<bool> in;
int cnt = 0;
bool call_query(int k)
{
in[k] = !in[k];
int old_cnt = cnt;
cnt = Query(k);
if (old_cnt != cnt)
return true;
else
return false;
}
vector<pair<int, int>> ans;
void rec(vector<int> a, vector<int> b)
{
if (a.size() == 1)
{
ans.push_back({a[0], b[0]});
return;
}
int mid = a.size()/2;
for (int i = 0; i < mid; i++)
if (!in[a[i]])
call_query(a[i]);
for (int i = mid; i < a.size(); i++)
if (in[a[i]])
call_query(a[i]);
vector<int> a1, b1, a2, b2;
for (int i = 0; i < mid; i++)
a1.push_back(a[i]);
for (int i = mid; i < a.size(); i++)
a2.push_back(a[i]);
for (int i = 0; i < b.size(); i++)
{
if (!call_query(b[i]))
b1.push_back(b[i]);
else
b2.push_back(b[i]);
}
rec(a1, b1);
rec(a2, b2);
}
void Solve(int N)
{
in = vector<bool>(2*N+1);
vector<pair<vector<int>, vector<int>>> nodes(1);
for (int i = 1; i <= 2*N; i++)
{
if (call_query(i))
nodes[0].second.push_back(i);
else
{
nodes[0].first.push_back(i);
}
}
rec(nodes[0].first, nodes[0].second);
for (auto[a, b] : ans)
Answer(a, b);
}
constexpr int MAX_N = 43000;
constexpr int MAX_CALLS = 1000000;
#if DEBUG
namespace {
void WrongAnswer(int code) {
printf("Wrong Answer [%d]\n", code);
exit(0);
}
int N;
int counterpart[2 * MAX_N + 1];
int num_queries;
int num_kinds;
int on[2 * MAX_N + 1];
int count[2 * MAX_N + 1];
int num_answers;
int answer[2 * MAX_N + 1];
} // namespace
int Query(int x) {
if (!(1 <= x && x <= 2 * N)) {
WrongAnswer(1);
}
if (++num_queries > MAX_CALLS) {
WrongAnswer(2);
}
const int type = std::min(x, counterpart[x]);
if (on[x]) {
--on[x];
--count[type];
if (count[type] == 0) {
--num_kinds;
}
} else {
++on[x];
++count[type];
if (count[type] == 1) {
++num_kinds;
}
}
return num_kinds;
}
void Answer(int a, int b) {
if (++num_answers > N) {
WrongAnswer(6);
}
if (!(1 <= a && a <= 2 * N && 1 <= b && b <= 2 * N)) {
WrongAnswer(3);
}
if (answer[a] != 0) {
WrongAnswer(4);
}
answer[a] = b;
if (answer[b] != 0) {
WrongAnswer(4);
}
answer[b] = a;
if (!(counterpart[a] == b && counterpart[b] == a)) {
WrongAnswer(5);
}
}
int main() {
if (scanf("%d", &N) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
for (int i = 1; i <= N; ++i) {
int x, y;
if (scanf("%d%d", &x, &y) != 2) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
counterpart[x] = y;
counterpart[y] = x;
}
Solve(N);
if (num_answers != N) {
WrongAnswer(6);
}
printf("Accepted: %d\n", num_queries);
return 0;
}
#endif