結果

問題 No.235 めぐるはめぐる (5)
コンテスト
ユーザー polylogK
提出日時 2019-09-11 14:36:57
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 6,657 bytes
コンパイル時間 2,063 ms
コンパイル使用メモリ 195,036 KB
実行使用メモリ 43,480 KB
最終ジャッジ日時 2024-07-02 16:46:16
合計ジャッジ時間 6,654 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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ファイルパターン 結果
other WA * 3
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ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

template<typename Monoid, typename OperatorMonoid = Monoid>
class lazy_segment_tree {
	using value_type = Monoid;
	using operator_type = OperatorMonoid;
	using size_type = size_t;

	using F = std::function<value_type (value_type, value_type)>;
	using G = std::function<value_type (value_type, operator_type, int, int)>;
	using H = std::function<operator_type (operator_type, operator_type)>;
	
	size_type size_;
	size_type height_;

	F f;
	G g;
	H h;
	value_type id;
	operator_type id_op;
	std::vector<value_type> data;
	std::vector<operator_type> lazy;
	std::vector<size_type> depth;
	
	const size_type get_height(const size_type& size) const {
		size_type height = 1;
		while(1 << height < size) height++;
		return height;
	}
	const size_type base_size() const {
		return 1 << height_;
	}
	void thrust(const size_type & k) {
		for(int i = height_; i; i--) eval(k >> i);
	}
	void eval(const size_type & k) {
		if(lazy[k] == id_op) return;
		lazy[k << 1 ^ 0] = h(lazy[k << 1 ^ 0], lazy[k]);
		lazy[k << 1 ^ 1] = h(lazy[k << 1 ^ 1], lazy[k]);
		data[k] = reflect(k);
		lazy[k] = id_op;
	}
	value_type reflect(const size_type & k) {
		if(lazy[k] == id_op) return data[k];
		int l = k % (1 << depth[k]) * (base_size() >> depth[k]);
		int r = l + (base_size() >> depth[k]);
		return data[k] = g(data[k], lazy[k], l, r);
	}
	void recalc(size_type k) {
		while(k >>= 1) data[k] = f(reflect(k << 1 ^ 0), reflect(k << 1 ^ 1));
	}
	
	public:
	lazy_segment_tree() {}
	lazy_segment_tree(int n, const F & f, const G & g, const H & h, const value_type & id, const operator_type & id_op) :
		size_(n), f(f), g(g), h(h), id(id), id_op(id_op) {
		height_ = get_height(size_);
		data.assign(base_size() << 1, id);
		lazy.assign(base_size() << 1, id_op);

		depth.assign(base_size() << 1, 0);
		for(int i = 0; i < height_ + 1; i++)
			for(int j = (1 << i); j < (1 << (i + 1)); j++)
				depth[j] = i;
	}
	void update(size_type a, size_type b, operator_type x) {
		thrust(a += base_size());
		thrust(b += base_size() - 1);
		for(size_type l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
			if(l & 1) lazy[l] = h(lazy[l++], x);
			if(r & 1) lazy[--r] = h(lazy[r], x);
		}
		recalc(a);
		recalc(b);
	}
	void change(size_type k, const value_type x) {
		thrust(k += base_size());
		data[k] = x;
		lazy[k] = id_op;
		recalc(k);
	}
	const value_type fold(size_type a, size_type b) {
		thrust(a += base_size());
		thrust(b += base_size() - 1);

		value_type left_value = id;
		value_type right_value = id;
		for(size_type l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
			if(l & 1) left_value = f(left_value, reflect(l++));
			if(r & 1) right_value = f(right_value, reflect(--r));
		}
		return f(left_value, right_value);
	}
};

// build: you have to run it before you use
// for_each: process [l, r]
// for_each_edge: process [l, r]
// distance: returns the dist (l, r)
class heavy_light_decomposition {
	using size_type = size_t;

	using F = std::function<void (int, int)>;

	public:
	std::vector<std::vector<int>> g;
	std::vector<int> vid, inv;

	private:
	std::vector<int> head, sz, heavy, par, dep, type;

	void dfs(int root) {
		using P = std::pair<int, int>;
		
		par[root] = -1;
		dep[root] = 0;
		std::stack<P> st;
		st.push({root, 0});
		while(!st.empty()) {
			int v = st.top().first;
			int & i = st.top().second;
		
			if(i < g[v].size()) {
				int u = g[v][i++];
				if(u == par[v]) continue;
				par[u] = v;
				dep[u] = dep[v] + 1;
				st.push({u, 0});
			} else {
				st.pop();
				int tmp = 0;
				for(auto e: g[v]) {
					if(e == par[v]) continue;
					sz[v] += sz[e];
					if(tmp < sz[e]) {
						tmp = sz[e];
						heavy[v] = e;
					}
				}
			}
		}
	}
	void bfs(int root, int c, int & k) {
		std::queue<int> qu({root});
		while(!qu.empty()) {
			int h = qu.front(); qu.pop();

			for(int v = h; v != -1; v = heavy[v]) {
				type[v] = c;
				vid[v] = k++;
				inv[vid[v]] = v;
				head[v] = h;
				for(int e: g[v])
					if(e != par[v] and e != heavy[v]) qu.push(e);
			}
		}
	}

	public:
	heavy_light_decomposition() {}
	heavy_light_decomposition(int n) :
		g(n), vid(n, -1), head(n), sz(n, 1), heavy(n, -1),
		par(n), dep(n), inv(n), type(n) {}
	void add_edge(int a, int b) {
		g[a].push_back(b);
		g[b].push_back(a);
	}
	void build(std::vector<int> rs = std::vector<int>(1, 0)) {
		int c = 0, k = 0;
		for(int r: rs) {
			dfs(r);
			bfs(r, c++, k);
		}
	}
	int lca(int u, int v) {
		while(true) {
			if(vid[u] > vid[v]) std::swap(u, v);
			if(head[u] == head[v]) return u;
			v = par[head[v]];
		}
	}
	void for_each(int u, int v, const F & f) {
		while(true) {
			if(vid[u] > vid[v]) std::swap(u, v);
			f(std::max(vid[head[v]], vid[u]), vid[v]);
			if(head[u] != head[v]) v = par[head[v]];
			else break;
		}
	}
	void for_each_edge(int u, int v, const F & f) {
		while(true) {
			if(vid[u] > vid[v]) std::swap(u, v);
			if(head[u] != head[v]) {
				f(vid[head[v]], vid[v]);
				v = par[head[v]];
			} else {
				if(u != v) f(vid[u] + 1, vid[v]);
				break;
			}
		}
	}

	int distance(int u, int v) {
		return dep[u] + dep[v] - 2 * dep[lca(u, v)];
	}
};

int main() {
	int n; scanf("%d", &n); std::vector<i64> s(n), c(n);
	for(int i = 0; i < n; i++) scanf("%d", &s[i]);
	for(int i = 0; i < n; i++) scanf("%d", &c[i]);

	heavy_light_decomposition hld(n);
	for(int i = 0; i < n - 1; i++) {
		int a, b; scanf("%d%d", &a, &b);

		hld.add_edge(a - 1, b - 1);
	}
	hld.build();

	std::vector<i64> S(n + 1);
	for(int i = 0; i < n; i++) S[i + 1] = S[i] + c[hld.inv[i]];

	const int MOD = 1e9 + 7;
	auto f = [MOD](i64 a, i64 b) { return (a + b) % MOD; };
	auto g = [MOD, S](i64 a, i64 b, int l, int r) {
		return ((S[r] - S[l]) % MOD * b % MOD + a) % MOD;
	};
	auto h = [MOD](i64 a, i64 b) { return (a + b) % MOD; };
	lazy_segment_tree<i64> seg(n, f, g, h, 0, 0);
	for(int i = 0; i < n; i++) seg.change(i, s[hld.inv[i]]);
	
	int q; scanf("%d", &q);
	while(q--) {
		int type; scanf("%d", &type);
		
		if(type == 0) {
			int x, y, z; scanf("%d%d%d", &x, &y, &z);

			auto f = [&seg, z](int l, int r) {
				seg.update(l, r + 1, z);
			};
			hld.for_each(x - 1, y - 1, f);
		} else {
			int x, y; scanf("%d%d", &x, &y);

			i64 ans = 0;
			auto f = [&seg, &ans, &MOD](int l, int r) {
				(ans += seg.fold(l, r + 1)) %= MOD;
			};
			hld.for_each(x - 1, y - 1, f);
			printf("%lld\n", ans);
		}
	}
	return 0;
}
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