結果

問題 No.235 めぐるはめぐる (5)
ユーザー pekempeypekempey
提出日時 2015-11-27 18:17:58
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 1,583 ms / 10,000 ms
コード長 4,025 bytes
コンパイル時間 1,765 ms
コンパイル使用メモリ 176,404 KB
実行使用メモリ 30,848 KB
最終ジャッジ日時 2024-09-13 23:05:41
合計ジャッジ時間 8,133 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
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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 1,583 ms
30,080 KB
testcase_01 AC 866 ms
30,848 KB
testcase_02 AC 1,449 ms
30,336 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:123:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  123 |         rep (i, N) scanf("%d", &S[i]);
      |                    ~~~~~^~~~~~~~~~~~~
main.cpp:124:25: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  124 |         rep (i, N) scanf("%d", &C[i]);
      |                    ~~~~~^~~~~~~~~~~~~
main.cpp:141:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  141 |                 scanf("%d", &q);
      |                 ~~~~~^~~~~~~~~~
main.cpp:144:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  144 |                         scanf("%d%d%d", &x, &y, &z);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
main.cpp:154:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  154 |                         scanf("%d%d", &x, &y);
      |                         ~~~~~^~~~~~~~~~~~~~~~

ソースコード

diff # 

#include <bits/stdc++.h>
#define GET_MACRO(a, b, c, NAME, ...) NAME
#define rep(...) GET_MACRO(__VA_ARGS__, rep3, rep2)(__VA_ARGS__)
#define rep2(i, a) rep3 (i, 0, a)
#define rep3(i, a, b) for (int i = (a); i < (b); i++)
#define repr(...) GET_MACRO(__VA_ARGS__, repr3, repr2)(__VA_ARGS__)
#define repr2(i, a) repr3 (i, 0, a)
#define repr3(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define chmin(a, b) ((b) < a && (a = (b), true))
#define chmax(a, b) (a < (b) && (a = (b), true))
using namespace std;
typedef long long ll;

const ll mod = 1e9 + 7;

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

struct HL {
	vector<vector<int>> g;
	vector<int> vid, depth, head, parent, size;
	int u, v, k;
	HL(int n) : g(n), vid(n), depth(n), head(n), parent(n), size(n, 1), k(0) {}
	void add(int u, int v) { g[u].push_back(v); g[v].push_back(u); }
	void build() { dfs(0); dfs2(0); }
	void dfs(int curr, int prev = -1) {
		head[curr] = curr; parent[curr] = prev;
		rep (i, g[curr].size()) if (g[curr][i] != prev) {
			int next = g[curr][i];
			depth[next] = depth[curr] + 1;
			dfs(next, curr);
			size[curr] += size[next];
			if (size[g[curr][0]] <= size[next]) swap(g[curr][0], g[curr][i]);
		}
	}
	void dfs2(int curr, int prev = -1) {
		vid[curr] = k++;
		rep (i, g[curr].size()) if (g[curr][i] != prev) {
			if (!i) head[g[curr][i]] = head[curr];
			dfs2(g[curr][i], curr);
		}
	}
	void set(int u, int v) { this->u = u, this->v = v; }
	pair<int, int> next() {
		if (head[u] == head[v]) {
            auto m = minmax(vid[u], vid[v]);
            u = -1;
            return {m.first, m.second + 1};
        }
        if (depth[head[u]] < depth[head[v]]) swap(u, v);
        int pu = u;
        u = parent[head[u]];
        return {vid[head[pu]], vid[pu] + 1};
	}
	bool has_next() { return u != -1; }
};

struct SegmentTree {
	vector<ll> seg, lazy, wsum;
	int size;
	SegmentTree(int n) {
		size = 1;
		while (size < n) size *= 2;
		seg.resize(size * 2);
		lazy.resize(size * 2);
		wsum.resize(size + 1);
	}
	void set(int k, ll v, ll w) {
		seg[k + size - 1] = v;
		wsum[k + 1] = w;
	}
	void build() {
		rep (i, 1, wsum.size()) (wsum[i] += wsum[i - 1]) %= mod;
		repr (i, size - 1) {
			(seg[i] = seg[i * 2 + 1] + seg[i * 2 + 2]) %= mod;
		}
	}
	void push(int k, int l, int r) {
		if (lazy[k] != 0) {
			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) {
		push(k, l, r);
		if (r <= a || b <= l) return;
		if (a <= l && r <= b) {
			lazy[k] = v;
			push(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]) % 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) {
		push(k, l, r);
		if (r <= a || b <= l) return 0;
		if (a <= l && r <= b) return seg[k];
		ll x = query(a, b, k * 2 + 1, l, (l + r) / 2);
		ll y = query(a, b, k * 2 + 2, (l + r) / 2, r);
		return (x + y) % mod;
	}
	ll query(int a, int b) {
		return query(a, b, 0, 0, size);
	}
};

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]);
	HL hl(N);
	rep (i, N - 1) {
		int a, b;
		cin >> a >> b;
		hl.add(a - 1, b - 1);
	}
	hl.build();
	SegmentTree tr(N);
	rep (i, N) {
		tr.set(hl.vid[i], S[i], C[i]);
	}
	tr.build();
	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.set(x, y);
			while (hl.has_next()) {
				auto p = hl.next();
				tr.update(p.first, p.second, z);
			}
		} else {
			int x, y;
			scanf("%d%d", &x, &y);
			x--; y--;
			hl.set(x, y);
			ll ans = 0;
			while (hl.has_next()) {
				auto p = hl.next();
				(ans += tr.query(p.first, p.second)) %= mod;
			}
			printf("%d\n", (int)ans);
		}
	}
}
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