結果

問題 No.235 めぐるはめぐる (5)
ユーザー pekempeypekempey
提出日時 2015-09-06 21:13:49
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 1,032 ms / 10,000 ms
コード長 4,998 bytes
コンパイル時間 1,659 ms
コンパイル使用メモリ 178,768 KB
実行使用メモリ 73,148 KB
最終ジャッジ日時 2024-07-19 04:42:36
合計ジャッジ時間 6,206 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
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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 1,032 ms
64,568 KB
testcase_01 AC 760 ms
73,148 KB
testcase_02 AC 904 ms
66,416 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:199:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  199 |         rep (i, N) scanf("%d", &S[i]);
      |                    ~~~~~^~~~~~~~~~~~~
main.cpp:200:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  200 |         rep (i, N) scanf("%d", &C[i]);
      |                    ~~~~~^~~~~~~~~~~~~
main.cpp:217:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  217 |                 scanf("%d", &q);
      |                 ~~~~~^~~~~~~~~~
main.cpp:220:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  220 |                         scanf("%d%d%d", &x, &y, &z);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
main.cpp:225:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  225 |                         scanf("%d%d", &x, &y);
      |                         ~~~~~^~~~~~~~~~~~~~~~

ソースコード

diff # 

#include <bits/stdc++.h>
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
using namespace std;
typedef long long ll;

const int inf = 1e9;
const ll mod = 1e9 + 7;

struct HL {
	vector<vector<int>> G, path;
	vector<int> parent, head, order, heads, heavy, depth;
	int root;
	HL(int n) : G(n), heavy(n, -1), parent(n), head(n), order(n), path(n), depth(n) {}
	void add(int u, int v) {
		G[u].push_back(v);
		G[v].push_back(u);
	}
	int dfs(int curr, int prev = -1) {
		int res = 1;
		head[curr] = curr;
		parent[curr] = prev;
		int maxv = -1;
		for (int next : G[curr]) if (next != prev) {
			int d = dfs(next, curr);
			res += d;
			if (maxv < d) maxv = d, heavy[curr] = next;
		}
		return res;
	}
	void dfs2(int curr, int prev = -1) {
		if (head[curr] == curr) heads.push_back(curr);
		path[head[curr]].push_back(curr);
		for (int next : G[curr]) if (next != prev) {
			if (next == heavy[curr]) {
				head[next] = head[curr];
				order[next] = order[curr] + 1;	
			}
			depth[next] = depth[curr] + (next != heavy[curr]);
			dfs2(next, curr);
		}
	}
	void build(int root = 0) {
		this->root = root;
		dfs(root);
		dfs2(root);
	}
	struct Iterator {
		int u, v;
		HL *hl;
		Iterator(HL *hl, int u, int v) : hl(hl), u(u), v(v) {}
		// head, [from, to)
		tuple<int, int, int> next() {
			if (hl->depth[u] == hl->depth[v]) {
				if (hl->head[u] == hl->head[v]) {
					auto m = minmax(hl->order[u], hl->order[v]);
					u = -1;
					return make_tuple(hl->head[v], m.first, m.second + 1);
				}
			}
			if (hl->depth[u] < hl->depth[v]) swap(u, v);
			int pu = u;
			u = hl->parent[hl->head[u]];
			return make_tuple(hl->head[pu], 0, hl->order[pu] + 1);
		}
		bool has_next() {
			return u != -1;
		}
	};
	Iterator iterator(int u, int v) {
		return Iterator(this, u, v);	
	}
};	

ll modulo(ll a) {
	a %= mod; a += mod; a %= mod;
	return a;
}

struct SegmentTree {
	vector<ll> seg, lazy, weight, wsum;
	int size;
	void init(int n) {
		size = 1;
		while (size < n) size *= 2;
		seg.resize(size * 2);
		lazy.resize(size * 2);
		weight.resize(size);
	}
	void set_value(int k, ll v) {
		seg[k + size - 1] = v;
	}
	void set_weight(int k, ll w) {
		weight[k] = w;
	}
	void build() {
		wsum.resize(size + 1);	
		rep (i, size) {
			wsum[i + 1] += wsum[i] + weight[i];
			wsum[i + 1] %= mod;
		}
		repr (i, size - 1) {
			seg[i] = seg[i * 2 + 1] + seg[i * 2 + 2];
			seg[i] %= mod;
		}
	}
	void evallazy(int k, int l, int r) {
		seg[k] += lazy[k] * (wsum[r] - wsum[l]);
		seg[k] = modulo(seg[k]);
		if (r - l > 1) {
			(lazy[k * 2 + 1] += lazy[k]) %= mod;
			(lazy[k * 2 + 2] += lazy[k]) %= mod;
		}
		lazy[k] = 0;
	}
	void update(int a, int b, ll v, int k, int l, int r) {
		evallazy(k, l, r);
		if (r <= a || b <= l) return;
		if (a <= l && r <= b) {
			lazy[k] = v;
			evallazy(k, l, r);
		} else {
			update(a, b, v, k * 2 + 1, l, (l + r) / 2);
			update(a, b, v, k * 2 + 2, (l + r) / 2, r);
			seg[k] = seg[k * 2 + 1] + seg[k * 2 + 2];
			seg[k] %= mod;
		}
	}
	void update(int a, int b, ll v) {
		update(a, b, v, 0, 0, size);
	}
	ll query(int a, int b, int k, int l, int r) {
		evallazy(k, l, r);
		if (r <= a || b <= l) return 0;
		if (a <= l && r <= b) return seg[k];
		ll res = 0;
		res += query(a, b, k * 2 + 1, l, (l + r) / 2);
		res += query(a, b, k * 2 + 2, (l + r) / 2, r);
		return res % mod;
	}
	ll query(int a, int b) {
		return query(a, b, 0, 0, size);
	}
};

struct HLSolver {
	HL hl;
	vector<SegmentTree> tr;
	HLSolver(int n) : hl(n), tr(n) {}
	void add(int u, int v) {
		hl.add(u, v);
	}
	void build() {
		hl.build();
		for (int h : hl.heads) {
			tr[h].init(hl.path[h].size());
		}
	}
	void set(int u, int x, int y) {
		tr[hl.head[u]].set_value(hl.order[u], x);
		tr[hl.head[u]].set_weight(hl.order[u], y);
	}
	void build_segment_tree() {
		for (int h : hl.heads) {
			tr[h].build();
		}
	}
	void update(int u, int v, ll x) {
		auto it = hl.iterator(u, v);
		while (it.has_next()) {
			auto t = it.next();
			int h = get<0>(t);
			int l = get<1>(t);
			int r = get<2>(t);
			tr[h].update(l, r, x);
		}
	}
	ll query(int u, int v) {
		ll res = 0;
		auto it = hl.iterator(u, v);
		while (it.has_next()) {
			auto t = it.next();
			int h = get<0>(t);
			int l = get<1>(t);
			int r = get<2>(t);
			res += tr[h].query(l, r);
			res %= mod;
		}	
		return res;
	}
};

int main() {
	int N;
	cin >> N;
	vector<int> S(N), C(N);
	rep (i, N) scanf("%d", &S[i]);
	rep (i, N) scanf("%d", &C[i]);
	HLSolver hl(N);
	rep (i, N - 1) {
		int a, b;
		cin >> a >> b;
		a--; b--;
		hl.add(a, b);
	}
	hl.build();
	rep (i, N) {
		hl.set(i, S[i], C[i]);
	}
	hl.build_segment_tree();
	int Q;
	cin >> Q;
	while (Q--) {
		int q;
		scanf("%d", &q);
		if (q == 0) {
			int x, y, z;
			scanf("%d%d%d", &x, &y, &z);
			x--; y--;
			hl.update(x, y, z);
		} else {
			int x, y;
			scanf("%d%d", &x, &y);
			x--; y--;
			printf("%d\n", (int)hl.query(x, y));
		}
	}
}
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