# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
696916 | Do_you_copy | Parkovi (COCI22_parkovi) | C++17 | 708 ms | 46984 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//Then
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 3e5 + 1;
//const int Mod = 1e9 + 7;
//const int inf =
int n, k;
vector <pii> adj[maxN];
ll mid, cnt;
ll dp[maxN];
set <int> S;
void dfs(int u, int p){
dp[u] = 0;
for (auto i: adj[u]){
if (i.fi == p) continue;
dfs(i.fi, u);
if (dp[i.fi] + i.se > mid){
++cnt;
S.insert(i.fi);
}
else dp[u] = max(dp[u], dp[i.fi] + i.se);
}
}
bool check(){
S.clear();
cnt = 0;
dfs(1, 0);
return cnt <= k;
}
void Init(){
cin >> n >> k;
for (int i = 1; i < n; ++i){
int u, v, w;
cin >> u >> v >> w;
adj[u].pb({v, w});
adj[v].pb({u, w});
}
ll l = 0, r = 1e4;
while (l < r){
mid = (l + r) >> 1;
if (check()) r = mid;
else l = mid + 1;
}
mid = l;
check();
cout << l << "\n";
for (int i = 1; i <= n; ++i){
if (S.size() == k) break;
S.insert(i);
}
for (auto i: S) cout << i << " ";
}
#define debug
#define taskname "test"
signed main(){
faster
if (fopen(taskname".inp", "r")){
freopen(taskname".inp", "r", stdin);
freopen(taskname".out", "w", stdout);
}
int tt = 1;
//cin >> tt;
while (tt--){
Init();
}
if (fopen("timeout.txt", "r")){
ofstream timeout("timeout.txt");
timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
timeout.close();
#ifndef debug
cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
#endif // debug
}
}
Compilation message (stderr)
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