結果
| 問題 |
No.1488 Max Score of the Tree
|
| コンテスト | |
| ユーザー |
stoq
|
| 提出日時 | 2021-05-14 04:07:36 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 102 ms / 2,000 ms |
| コード長 | 3,307 bytes |
| コンパイル時間 | 2,535 ms |
| コンパイル使用メモリ | 206,624 KB |
| 最終ジャッジ日時 | 2025-01-21 10:51:01 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 |
ソースコード
#define MOD_TYPE 2
#pragma region Macros
#include <bits/stdc++.h>
using namespace std;
#if 0
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif
#if 1
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif
using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;
constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr ld PI = acos(-1.0);
constexpr ld EPS = 1e-7;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};
#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";
struct io_init
{
io_init()
{
cin.tie(0);
ios::sync_with_stdio(false);
cout << setprecision(30) << setiosflags(ios::fixed);
};
} io_init;
template <typename T>
inline bool chmin(T &a, T b)
{
if (a > b)
{
a = b;
return true;
}
return false;
}
template <typename T>
inline bool chmax(T &a, T b)
{
if (a < b)
{
a = b;
return true;
}
return false;
}
inline ll CEIL(ll a, ll b)
{
return (a + b - 1) / b;
}
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val)
{
fill((T *)array, (T *)(array + N), val);
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept
{
is >> p.first >> p.second;
return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> &p) noexcept
{
os << p.first << " " << p.second;
return os;
}
#pragma endregion
// --------------------------------------
int n, k;
vector<pii> E[110];
int leaves[110] = {};
vector<pll> vec;
ll sum = 0;
int dfs0(int v, int p)
{
if (E[v].size() == 1 and v != 0)
return leaves[v] = 1;
for (auto [c, l] : E[v])
{
if (c == p)
continue;
leaves[v] += dfs0(c, v);
vec.push_back({leaves[c], l});
sum += leaves[c] * l;
}
return leaves[v];
}
ll dp[110][100010] = {};
void solve()
{
cin >> n >> k;
rep(i, n - 1)
{
int a, b, c;
cin >> a >> b >> c;
a--, b--;
E[a].push_back({b, c});
E[b].push_back({a, c});
}
dfs0(0, -1);
rep(i, n - 1) rep(j, k + 1)
{
auto [a, b] = vec[i];
chmax(dp[i + 1][j], dp[i][j]);
if (j + b <= k)
chmax(dp[i + 1][j + b], dp[i][j] + a * b);
}
ll ans = 0;
rep(j, k + 1) chmax(ans, dp[n - 1][j]);
ans += sum;
cout << ans << "\n";
}
int main()
{
solve();
}
stoq