Distances

input/code.cpp: In function 'void solve()':
input/code.cpp:83:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (auto x: ord) cout << x << ' '; cout << endl;
  ^~~
input/code.cpp:83:38: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  for (auto x: ord) cout << x << ' '; cout << endl;
                                      ^~~~
input/code.cpp: In function 'void usaco()':
input/code.cpp:15:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("problem.in", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:16:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("problem.out", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <bits/stdc++.h>
using namespace std;
void fast() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
}
void ran() {
	srand(chrono::steady_clock::now().time_since_epoch().count());
}
long long get_rand() {
	long long a = rand();
	long long b = rand();
	return a * (RAND_MAX + 1ll) + b;
}
void usaco() {
	freopen("problem.in", "r", stdin); 
	freopen("problem.out", "w", stdout);
}
template<typename T>
using min_pq = priority_queue<T, vector<T>, greater<T>>;
// #define endl '\n'
// #define double long double
// #define int long long
// const int MOD = 1000 * 1000 * 1000 + 7;
// const int MOD = 998244353;
 
int n;
const int MXN = 105;
vector<int> adj[MXN];
int dist[MXN][MXN];
int fr;
 
void dfs(int node, int par, int dep) {
	dist[fr][node] = dep;
	for (auto x: adj[node]) {
		if (x == par) continue;
		dfs(x, node, dep+1);
	}
}
 
void solve() {
	
	for (int i=0; i<MXN; i++) adj[i].clear();
	
	cin >> n;
	for (int i=1; i<n; i++) {
		int a, b;
		cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	
	for (int i=1; i<=n; i++) {
		fr = i;
		dfs(i, -1, 0);
	}
	
	vector<int> ord;
	ord.push_back(1);
	bool taken[n+1];
	memset(taken, 0, sizeof taken);
	taken[1] = true;
	
	for (int tri=0; tri<n-1; tri++) {
		
		int x = ord.back();
		
		int deepest = -1;
		for (int i=1; i<=n; i++) {
			if (taken[i]) continue;
			if (dist[x][i] > 3) continue;
			if (dist[1][i] > dist[1][deepest]) {
				deepest = i;
			}
		}
		
		assert(deepest != -1);
		
		taken[deepest] = true;
		ord.push_back(deepest);
				
	}
	
	for (auto x: ord) cout << x << ' '; cout << endl;
	
}
 
signed main() {
 
	ran(); fast();
 
	int t;
	cin >> t;
	while (t--) solve();
 
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED