結果
問題 | No.1488 Max Score of the Tree |
ユーザー | rokahikou1 |
提出日時 | 2021-05-10 22:10:36 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 85 ms / 2,000 ms |
コード長 | 5,522 bytes |
コンパイル時間 | 1,870 ms |
コンパイル使用メモリ | 180,324 KB |
実行使用メモリ | 82,432 KB |
最終ジャッジ日時 | 2024-09-20 02:01:34 |
合計ジャッジ時間 | 4,091 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 75 ms
78,720 KB |
testcase_01 | AC | 79 ms
75,648 KB |
testcase_02 | AC | 81 ms
79,616 KB |
testcase_03 | AC | 82 ms
82,304 KB |
testcase_04 | AC | 83 ms
82,304 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 19 ms
22,784 KB |
testcase_07 | AC | 47 ms
48,512 KB |
testcase_08 | AC | 28 ms
34,688 KB |
testcase_09 | AC | 27 ms
25,472 KB |
testcase_10 | AC | 44 ms
49,792 KB |
testcase_11 | AC | 85 ms
82,432 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 14 ms
14,592 KB |
testcase_14 | AC | 37 ms
40,960 KB |
testcase_15 | AC | 22 ms
26,624 KB |
testcase_16 | AC | 6 ms
7,552 KB |
testcase_17 | AC | 15 ms
17,792 KB |
testcase_18 | AC | 52 ms
56,064 KB |
testcase_19 | AC | 28 ms
32,384 KB |
testcase_20 | AC | 13 ms
14,848 KB |
testcase_21 | AC | 6 ms
9,216 KB |
testcase_22 | AC | 23 ms
26,112 KB |
testcase_23 | AC | 2 ms
6,944 KB |
testcase_24 | AC | 2 ms
6,940 KB |
testcase_25 | AC | 2 ms
6,944 KB |
testcase_26 | AC | 17 ms
21,248 KB |
testcase_27 | AC | 4 ms
6,944 KB |
testcase_28 | AC | 9 ms
11,648 KB |
testcase_29 | AC | 13 ms
14,336 KB |
testcase_30 | AC | 60 ms
66,688 KB |
testcase_31 | AC | 85 ms
82,432 KB |
ソースコード
#pragma region Macros #include <bits/stdc++.h> #define rep(i, n) for(int(i) = 0; (i) < (n); (i)++) #define FOR(i, m, n) for(int(i) = (m); (i) < (n); (i)++) #define ALL(v) (v).begin(), (v).end() #define LLA(v) (v).rbegin(), (v).rend() #define SZ(v) (int)(v).size() #define INT(...) \ int __VA_ARGS__; \ read(__VA_ARGS__) #define LL(...) \ ll __VA_ARGS__; \ read(__VA_ARGS__) #define DOUBLE(...) \ double __VA_ARGS__; \ read(__VA_ARGS__) #define CHAR(...) \ char __VA_ARGS__; \ read(__VA_ARGS__) #define STRING(...) \ string __VA_ARGS__; \ read(__VA_ARGS__) #define VEC(type, name, size) \ vector<type> name(size); \ read(name) #define VEC2(type, name, height, width) \ vector<vector<type>> name(height, vector<type>(width)); \ read(name) using namespace std; using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using Graph = vector<vector<int>>; template <typename T> struct edge { int from, to; T cost; edge(int f, int t, T c) : from(f), to(t), cost(c) {} edge() = default; }; template <typename T> using WGraph = vector<vector<edge<T>>>; const int INF = 1 << 30; const ll LINF = 1LL << 60; const int MOD = 1e9 + 7; const char newl = '\n'; template <class T> inline vector<T> make_vec(size_t a, T val) { return vector<T>(a, val); } template <class... Ts> inline auto make_vec(size_t a, Ts... ts) { return vector<decltype(make_vec(ts...))>(a, make_vec(ts...)); } void read() {} template <class T> inline void read(T &a) { cin >> a; } template <class T, class S> inline void read(pair<T, S> &p) { read(p.first), read(p.second); } template <class T> inline void read(vector<T> &v) { for(auto &&a : v) read(a); } template <class Head, class... Tail> inline void read(Head &head, Tail &...tail) { read(head), read(tail...); } template <class T> void write(const T &a) { cout << a << '\n'; } template <class T> void write(const vector<T> &a) { for(int i = 0; i < a.size(); i++) cout << a[i] << (i + 1 == a.size() ? '\n' : ' '); } template <class Head, class... Tail> void write(const Head &head, const Tail &...tail) { cout << head << ' '; write(tail...); } template <class T> void writel(const T &a) { cout << a << '\n'; } template <class T> void writel(const vector<T> &a) { for(int i = 0; i < a.size(); i++) cout << a[i] << '\n'; } template <class Head, class... Tail> void writel(const Head &head, const Tail &...tail) { cout << head << '\n'; write(tail...); } template <class T> auto sum(const vector<T> &a) { return accumulate(ALL(a), T(0)); } template <class T> auto min(const vector<T> &a) { return *min_element(ALL(a)); } template <class T> auto max(const vector<T> &a) { return *max_element(ALL(a)); } template <class T> inline void chmax(T &a, T b) { (a < b ? a = b : a); } template <class T> inline void chmin(T &a, T b) { (a > b ? a = b : a); } struct IO { IO() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(10); } } io; #pragma endregion int main() { INT(n, k); WGraph<ll> g(n); vector<edge<ll>> edges(n - 1); rep(i, n - 1) { INT(a, b, c); a--, b--; g[a].emplace_back(a, b, c); g[b].emplace_back(b, a, c); edges[i] = edge<ll>(a, b, c); } auto sz = make_vec(n, -1); auto depth = make_vec(n, -1); ll base = 0; auto f = [&](auto &&f, int v, int p) -> int { int ret = 0; if(sz[v] != -1) return sz[v]; if(g[v].size() == 1 && p != -1) { return sz[v] = 1; } for(auto e : g[v]) { if(e.to == p) continue; ret += f(f, e.to, v); } return sz[v] = ret; }; auto rec = [&](auto &&rec, int v, int p, ll r) -> void { if(g[v].size() == 1 && p != -1) { base += r; return; } for(auto e : g[v]) { if(e.to == p) continue; rec(rec, e.to, v, r + e.cost); } }; f(f, 0, -1); rec(rec, 0, -1, 0LL); auto dp = make_vec(n, k + 1, -1LL); auto cost = make_vec(n - 1, 0LL); auto value = make_vec(n - 1, 0LL); dp[0][0] = 0; rep(i, n - 1) { auto e = edges[i]; cost[i] = e.cost; value[i] = e.cost * (min(sz[e.to], sz[e.from])); } for(int i = 0; i < n - 1; i++) { for(int j = 0; j <= k; j++) { if(dp[i][j] == -1) continue; chmax(dp[i + 1][j], dp[i][j]); if(j + cost[i] <= k) chmax(dp[i + 1][j + cost[i]], dp[i][j] + value[i]); } } ll res = -1; rep(i, k + 1) { chmax(res, dp[n - 1][i]); } write(base + res); }