# | TimeUTC-0 | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1161526 | turska | Easter Eggs (info1cup17_eastereggs) | C++20 | 8 ms | 544 KiB |
#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
vector<vector<int>> at_depth, adj;
vector<int> from, dist;
void dfs(int v, int p, bool save) {
if (save) at_depth[dist[v]].push_back(v);
for (auto u: adj[v]) if (u!=p) {
dist[u] = dist[v]+1;
from[u] = v;
dfs(u, v, save);
}
}
int findEgg(int N, vector <pair<int, int>> bridges) {
from.assign(N, 0);
dist = from;
adj.assign(N, {});
at_depth = adj;
for (int i=0; i<N-1; i++) {
auto [u, v] = bridges[i];
u--; v--;
adj[u].push_back(v);
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