#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10;
int n, k;
long long dist[N];
array<int, 2> par[N];
vector<array<int, 2>> adj[N];
vector<int> ord;
bool mark[N], choose[N];
void Dfs1(int u, int p) {
for (auto [v, c] : adj[u]) {
if (v == p) {
continue;
}
dist[v] = dist[u] + c;
par[v] = {u, c};
Dfs1(v, u);
}
}
void Dfs2(int u, int p, long long rem) {
if (rem < 0) {
return;
}
mark[u] = true;
for (auto [v, c] : adj[u]) {
if (v == p) {
continue;
}
Dfs2(v, u, rem - c);
}
}
int calc(long long r) {
fill(mark + 1, mark + 1 + n, false);
fill(choose + 1, choose + 1 + n, false);
int res = 0;
for (auto u : ord) {
if (mark[u]) {
continue;
}
long long rem = r;
while (par[u][0] && rem >= par[u][1]) {
rem -= par[u][1];
u = par[u][0];
}
++res;
choose[u] = true;
Dfs2(u, -1, r);
}
return res;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> k;
for (int i = 1; i < n; ++i) {
int u, v, c;
cin >> u >> v >> c;
adj[u].push_back({v, c});
adj[v].push_back({u, c});
}
Dfs1(1, -1);
ord.resize(n);
iota(ord.begin(), ord.end(), 1);
sort(ord.begin(), ord.end(), [&](int u, int v){
return dist[u] > dist[v];
});
long long l = 0, r = 1e15, ans = -1;
while (l <= r) {
long long mid = (l + r) >> 1;
int cnt = calc(mid);
if (cnt <= k) {
ans = mid;
r = mid - 1;
} else {
l = mid + 1;
}
}
cout << ans << '\n';
int cnt = calc(ans);
for (int i = 1; i <= n; ++i) {
if (!choose[i] && cnt < k) {
++cnt;
choose[i] = true;
}
}
for (int i = 1; i <= n; ++i) {
if (choose[i]) {
cout << i << ' ';
}
}
cout << '\n';
return 0;
}
