結果

問題 No.1221 木 *= 3
ユーザー theory_and_me
提出日時 2020-09-04 23:24:16
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 152 ms / 2,000 ms
コード長 3,152 bytes
コンパイル時間 2,934 ms
コンパイル使用メモリ 199,720 KB
最終ジャッジ日時 2025-01-14 06:27:24
ジャッジサーバーID
(参考情報)
judge3 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 18
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for(ll i=0;i<(ll)n;i++)
#define dump(x) cerr << "Line " << __LINE__ << ": \n" << #x << " = " << (x) << "\n";
#define spa << " " <<
#define fi first
#define se second
#define ALL(a) (a).begin(),(a).end()
#define ALLR(a) (a).rbegin(),(a).rend()
using ld = long double;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
using pll = pair<long, long>;
using pdd = pair<ld, ld>;
template<typename T> using V = vector<T>;
template<typename T> using P = pair<T, T>;
template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); }
template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); }
template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;}
template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; }
template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;}
struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
template <class T> void UNIQUE(vector<T> &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());}
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }
void fail() { cout << -1 << '\n'; exit(0); }
inline int popcount(const int x) { return __builtin_popcount(x); }
inline int popcount(const ll x) { return __builtin_popcountll(x); }
template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++)
{cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<"\n";}};
template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0];
for(ll i=1;i<n;i++)cerr spa v[i];
cerr<<"\n";};
const ll INF = (1ll<<62);
// const ld EPS = 1e-10;
// const ld PI = acos(-1.0);
const ll mod = (int)1e9 + 7;
//const ll mod = 998244353;
int main(){
ll N;
cin >> N;
V<ll> a(N), b(N);
REP(i, N) cin >> a[i];
REP(i, N) cin >> b[i];
V<V<ll>> G(N);
REP(i, N-1){
ll u, v;
cin >> u >> v;
u--, v--;
G[u].push_back(v);
G[v].push_back(u);
}
auto dfs = [&](auto self, ll now, ll par)->pll{
V<ll> x, y, z;
for(auto next: G[now]){
if(next == par) continue;
pll val = self(self, next, now);
x.push_back(val.first);
y.push_back(val.second);
z.push_back(b[now]+b[next]);
}
ll toru = -a[now];
ll sz = x.size();
REP(i, sz){
toru += max(x[i]+z[i], y[i]);
}
ll toranai = 0;
REP(i, sz){
toranai += max(x[i], y[i]);
}
return {toru, toranai};
};
ll res = 0;
REP(i, N) res += a[i];
pll val = dfs(dfs, 0, -1);
res += max(val.first, val.second);
cout << res << endl;
return 0;
}
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