130 lines
2.5 KiB
C++
130 lines
2.5 KiB
C++
/* Problem URL: https://codeforces.com/gym/102346/problem/D */
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#include <bits/stdc++.h>
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using namespace std;
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#define V vector
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#define rmin(a, b) a = min(a, b)
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#define rmax(a, b) a = max(a, b)
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#define rep(i, lim) for (int i = 0; i < (lim); i++)
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#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
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#define repv(i, v) for (auto &i : (v))
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#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
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#define sortv(v) sort(v.begin(), v.end())
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#define all(v) (v).begin(), (v).end()
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using vi = vector<int>;
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using vvi = vector<vi>;
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using vvvi = vector<vvi>;
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using vvvvi = vector<vvvi>;
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using ll = long long;
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using vl = vector<ll>;
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using vvl = vector<vl>;
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using vvvl = vector<vvl>;
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using vvvvl = vector<vvvl>;
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template<class v>
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auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
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os << vec[0];
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for (size_t i = 1; i < vec.size(); i++) {
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os << ' ' << vec[i];
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}
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os << '\n';
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<v> &vec)->istream& {
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for (auto &i : vec) {
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is >> i;
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}
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return is;
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}
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template<class v>
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auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
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for (auto &i : vec) {
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os << i[0];
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for (size_t j = 1; j < i.size(); j++) {
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os << ' ' << i[j];
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}
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os << '\n';
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}
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<vector<v>> &vec)->istream& {
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for (auto &i : vec) {
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for (auto &j : i) {
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is >> j;
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}
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}
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return is;
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}
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int main()
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{
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ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int n, k;
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cin >> n >> k;
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vvi graph(n);
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nrep(i, 1, n) {
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int p;
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cin >> p;
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graph[p - 1].push_back(i);
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}
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V<multiset<int, greater<>>> sets(n);
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function<void(int)> dfs = [&](int i) {
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for (auto j : graph[i]) {
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dfs(j);
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if (sets[j].size() > sets[i].size()) {
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swap(sets[j], sets[i]);
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}
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for (auto k : sets[j]) {
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sets[i].insert(k);
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}
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}
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if (sets[i].empty()) {
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sets[i].insert(1);
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return;
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}
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auto itr = sets[i].begin();
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int v = *itr + 1;
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sets[i].erase(itr);
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sets[i].insert(v);
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};
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dfs(0);
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int ans = 0;
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auto itr = sets[0].begin();
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rep(i, k) {
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if (itr == sets[0].end()) {
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break;
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}
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ans += *itr;
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itr++;
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}
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cout << ans << '\n';
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}
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