이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
std::variant<bool, vector<int>> find_journey(int n, int m, vector<int> U, vector<int> V) {
if (n == 2) {
vector<int> e[n];
for (int i = 0; i < m; i++) {
e[U[i]].push_back(i);
}
if (e[0].size() >= 2 && e[1].size() >= 1) {
return vector<int>{e[0][0], e[1][0], e[0][1], e[0][0], e[1][0], e[0][1]};
} else {
return false;
}
}
vector<vector<int>> adj(n);
for (int i = 0; i < m; i += 2) {
adj[U[i]].push_back(i);
}
vector<int> path;
vector<int> dep(n);
vector<int> vis(n);
bool found = false;
vector<int> ans;
function<void(int)> dfs = [&](int u) {
vis[u] = 1;
for (int i : adj[u]) {
if (vis[V[i]] == 2) {
continue;
}
if (vis[V[i]] == 1) {
vector<int> cycle;
for (int j = 0; j < dep[u] - dep[V[i]]; j++) {
cycle.push_back(path.back());
path.pop_back();
}
reverse(cycle.begin(), cycle.end());
cycle.push_back(i);
for (int x : cycle) {
ans.push_back(x);
}
for (int x : cycle) {
ans.push_back(x ^ 1);
}
reverse(cycle.begin(), cycle.end());
for (int x : cycle) {
ans.push_back(x);
}
for (int x : cycle) {
ans.push_back(x ^ 1);
}
found = true;
return;
}
dep[V[i]] = dep[u] + 1;
path.push_back(i);
dfs(V[i]);
if (found) return;
path.pop_back();
}
vis[u] = 2;
};
dfs(0);
if (ans.empty()) {
return false;
} else {
return ans;
}
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |