結果
問題 | No.1221 木 *= 3 |
ユーザー | packer_jp |
提出日時 | 2020-09-04 22:03:31 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 187 ms / 2,000 ms |
コード長 | 3,361 bytes |
コンパイル時間 | 1,884 ms |
コンパイル使用メモリ | 177,048 KB |
実行使用メモリ | 14,976 KB |
最終ジャッジ日時 | 2024-11-26 12:52:56 |
合計ジャッジ時間 | 5,698 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 182 ms
14,848 KB |
testcase_08 | AC | 176 ms
14,720 KB |
testcase_09 | AC | 183 ms
14,848 KB |
testcase_10 | AC | 180 ms
14,720 KB |
testcase_11 | AC | 177 ms
14,976 KB |
testcase_12 | AC | 168 ms
11,028 KB |
testcase_13 | AC | 161 ms
11,032 KB |
testcase_14 | AC | 165 ms
11,156 KB |
testcase_15 | AC | 166 ms
11,032 KB |
testcase_16 | AC | 163 ms
11,156 KB |
testcase_17 | AC | 185 ms
10,880 KB |
testcase_18 | AC | 175 ms
10,880 KB |
testcase_19 | AC | 184 ms
10,872 KB |
testcase_20 | AC | 187 ms
11,008 KB |
testcase_21 | AC | 185 ms
10,880 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define int long long #define rep(i, n) for (int i = 0; i < (int) (n); i++) #define reps(i, n) for (int i = 1; i <= (int) (n); i++) #define all(x) (x).begin(), (x).end() #define uniq(x) (x).erase(unique(all(x)), (x).end()) #define bit(n) (1LL << (n)) #define dump(x) cerr << #x " = " << (x) << endl using vint = vector<int>; using vvint = vector<vint>; using pint = pair<int, int>; using vpint = vector<pint>; template<typename T> using priority_queue_rev = priority_queue<T, vector<T>, greater<T>>; constexpr double PI = 3.1415926535897932384626433832795028; constexpr int DY[9] = {0, 1, 0, -1, 1, 1, -1, -1, 0}; constexpr int DX[9] = {1, 0, -1, 0, 1, -1, -1, 1, 0}; int sign(int x) { return (x > 0) - (x < 0); } int gcd(int a, int b) { while (b) { swap(a %= b, b); } return a; } int lcm(int a, int b) { return a / gcd(a, b) * b; } int cdiv(int a, int b) { return (a - 1 + b) / b; } template<typename T> void fin(T mes) { cout << mes << endl; exit(0); } template<typename T, typename U> bool chmax(T &a, const U &b) { if (a < b) { a = b; return true; } return false; } template<typename T, typename U> bool chmin(T &a, const U &b) { if (b < a) { a = b; return true; } return false; } template<typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &rhs) { os << "(" << rhs.first << ", " << rhs.second << ")"; return os; } template<typename T> ostream &operator<<(ostream &os, const vector<T> &rhs) { os << "{"; for (auto itr = rhs.begin(); itr != rhs.end(); itr++) { os << *itr << (next(itr) != rhs.end() ? ", " : ""); } os << "}"; return os; } template<typename T> ostream &operator<<(ostream &os, const deque<T> &rhs) { os << "{"; for (auto itr = rhs.begin(); itr != rhs.end(); itr++) { os << *itr << (next(itr) != rhs.end() ? ", " : ""); } os << "}"; return os; } template<typename T> ostream &operator<<(ostream &os, const set<T> &rhs) { os << "{"; for (auto itr = rhs.begin(); itr != rhs.end(); itr++) { os << *itr << (next(itr) != rhs.end() ? ", " : ""); } os << "}"; return os; } template<typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &rhs) { os << "{"; for (auto itr = rhs.begin(); itr != rhs.end(); itr++) { os << *itr << (next(itr) != rhs.end() ? ", " : ""); } os << "}"; return os; } struct setup { static constexpr int PREC = 20; setup() { cout << fixed << setprecision(PREC); cerr << fixed << setprecision(PREC); }; } setup; signed main() { int N; cin >> N; vint a(N), b(N); vvint adj(N); rep(i, N) { cin >> a[i]; } rep(i, N) { cin >> b[i]; } rep(i, N - 1) { int u, v; cin >> u >> v, u--, v--; adj[u].emplace_back(v), adj[v].emplace_back(u); } auto dfs = [&](auto &&dfs, int cur, int par) -> pint { int x = a[cur], y = 0; for (int to:adj[cur]) { if (to == par) { continue; } auto nxt = dfs(dfs, to, cur); x += max(nxt.first, nxt.second); y += max(nxt.first, nxt.second + b[cur] + b[to]); } return {x, y}; }; auto ans = dfs(dfs, 0, -1); cout << max(ans.first, ans.second) << endl; }