#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
struct Solver {
int n, d;
vector<vector<int>> adj;
vector<vector<vector<int>>> unknown;
Solver(int n, int d) :
n(n), d(d),
adj(n, vector(n, -1)), unknown(n, vector(n, vector(n, 3)))
{}
int query(int u, int v) { return are_connected({u}, {v}); }
void set(int u, int v, int x) {
adj[u][v] = x;
for (int i = 0; i < u; i++) relax(i, u, v);
for (int i = u+1; i < v; i++) relax(u, i, v);
for (int i = v+1; i < n; i++) relax(u, v, i);
}
void relax(int u, int v, int w) {
unknown[u][v][w]--;
if (unknown[u][v][w] == 1) {
int total = 0;
if (adj[u][v] == -1) total += adj[u][v];
if (adj[u][w] == -1) total += adj[u][w];
if (adj[v][w] == -1) total += adj[v][w];
int rem = 2 - total;
if (adj[u][v] == -1) set(u, v, rem);
if (adj[u][w] == -1) set(u, w, rem);
if (adj[v][w] == -1) set(v, w, rem);
}
}
void dfs(int cur, vector<bool> &vis, vector<int> &cur_stk, vector<int> &ans) {
cur_stk.push_back(cur);
vis[cur] = true;
if (cur_stk.size() > ans.size()){
ans = vector<int>(cur_stk);
}
for (int i = 0; i < n; i++) if (adj[cur][i] && !vis[i]) {
dfs(i, vis, cur_stk, ans);
}
cur_stk.pop_back();
}
vector<int> solve() {
for (int i = 0; i < n; i++) {
for (int j = i + 1; j < n; j++) {
if (adj[i][j] == -1) set(i, j, query(i, j));
}
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (i == j) adj[i][j] = 0;
else if (adj[i][j] == -1) adj[i][j] = adj[j][i];
}
}
vector<int> ret = {};
for (int root = 0; root < n; root++) {
vector<int> cur = {};
vector<bool> vis(n, false);
dfs(root, vis, cur, ret);
}
return ret;
}
};
vector<int> longest_trip(int N, int D) {
Solver solver(N, D);
return solver.solve();
}
#ifdef Zanite
#include "longesttrip.h"
#include <cassert>
#include <cstdio>
#include <string>
#include <vector>
static inline constexpr int maxNumberOfCalls = 32640;
static inline constexpr int maxTotalNumberOfCalls = 150000;
static inline constexpr int maxTotalNumberOfLandmarksInCalls = 1500000;
static int call_counter = 0;
static int total_call_counter = 0;
static int landmark_counter = 0;
static int C, N, D;
static std::vector<std::vector<int>> U;
static std::vector<bool> present;
static inline void protocol_violation(std::string message)
{
printf("Protocol Violation: %s\n", message.c_str());
exit(0);
}
bool are_connected(std::vector<int> A, std::vector<int> B)
{
++call_counter;
++total_call_counter;
if (call_counter > maxNumberOfCalls || total_call_counter > maxTotalNumberOfCalls)
{
protocol_violation("too many calls");
}
int nA = A.size(), nB = B.size();
landmark_counter += nA + nB;
if (landmark_counter > maxTotalNumberOfLandmarksInCalls)
{
protocol_violation("too many elements");
}
if (nA == 0 || nB == 0)
{
protocol_violation("invalid array");
}
for (int i = 0; i < nA; ++i)
{
if (A[i] < 0 || N <= A[i])
{
protocol_violation("invalid array");
}
if (present[A[i]])
{
protocol_violation("invalid array");
}
present[A[i]] = true;
}
for (int i = 0; i < nA; ++i)
{
present[A[i]] = false;
}
for (int i = 0; i < nB; ++i)
{
if (B[i] < 0 || N <= B[i])
{
protocol_violation("invalid array");
}
if (present[B[i]])
{
protocol_violation("invalid array");
}
present[B[i]] = true;
}
for (int i = 0; i < nB; ++i)
{
present[B[i]] = false;
}
for (int i = 0; i < nA; ++i)
{
for (int j = 0; j < nB; ++j)
{
if (A[i] == B[j])
{
protocol_violation("non-disjoint arrays");
}
}
}
for (int i = 0; i < nA; ++i)
{
for (int j = 0; j < nB; ++j)
{
if (U[std::max(A[i], B[j])][std::min(A[i], B[j])] == 1)
{
return true;
}
}
}
return false;
}
int main()
{
assert(1 == scanf("%d", &C));
int maximumCalls = 0;
for (int c = 0; c < C; ++c)
{
call_counter = 0;
assert(2 == scanf("%d %d", &N, &D));
present.assign(N, false);
U.resize(N);
for (int i = 1; i < N; ++i)
{
U[i].resize(i);
for (int j = 0; j < i; ++j)
{
assert(1 == scanf("%d", &U[i][j]));
}
}
for (int i = 2; i < N; ++i)
{
for (int j = 1; j < i; ++j)
{
for (int k = 0; k < j; ++k)
{
if (U[i][j] + U[i][k] + U[j][k] < D)
{
printf("Insufficient Density\n");
exit(0);
}
}
}
}
std::vector<int> t = longest_trip(N, D);
int l = t.size();
printf("%d\n", l);
for (int i = 0; i < l; ++i)
{
printf(i == 0 ? "%d" : " %d", t[i]);
}
printf("\n");
printf("%d\n", call_counter);
maximumCalls = std::max(maximumCalls, call_counter);
call_counter = 0;
}
printf("%d\n", maximumCalls);
return 0;
}
#endif
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
344 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
344 KB |
Output is correct |
| 2 |
Correct |
7 ms |
344 KB |
Output is correct |
| 3 |
Correct |
18 ms |
1032 KB |
Output is correct |
| 4 |
Correct |
79 ms |
9688 KB |
Output is correct |
| 5 |
Correct |
364 ms |
69504 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
344 KB |
Output is correct |
| 2 |
Correct |
9 ms |
344 KB |
Output is correct |
| 3 |
Correct |
21 ms |
1036 KB |
Output is correct |
| 4 |
Correct |
75 ms |
9312 KB |
Output is correct |
| 5 |
Correct |
369 ms |
69332 KB |
Output is correct |
| 6 |
Incorrect |
0 ms |
344 KB |
Incorrect |
| 7 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
344 KB |
Output is correct |
| 2 |
Correct |
6 ms |
344 KB |
Output is correct |
| 3 |
Correct |
18 ms |
1112 KB |
Output is correct |
| 4 |
Correct |
78 ms |
9308 KB |
Output is correct |
| 5 |
Correct |
356 ms |
69332 KB |
Output is correct |
| 6 |
Incorrect |
1 ms |
344 KB |
Incorrect |
| 7 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
340 KB |
Output is correct |
| 2 |
Correct |
6 ms |
344 KB |
Output is correct |
| 3 |
Correct |
22 ms |
1036 KB |
Output is correct |
| 4 |
Correct |
78 ms |
9492 KB |
Output is correct |
| 5 |
Correct |
383 ms |
69280 KB |
Output is correct |
| 6 |
Incorrect |
0 ms |
344 KB |
Incorrect |
| 7 |
Halted |
0 ms |
0 KB |
- |
