oj.uz

답안 #1049537

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1049537 2024-08-08T21:16:27 Z 0npata Sprinkler (JOI22_sprinkler) C++17
3 / 100
 4000 ms 840176 KB 
#include<bits/stdc++.h>
using namespace std;

#define int long long
#define vec vector
#define hmap unordered_map

const int MXN = 200'005;
int N, L;
int H[MXN];

bool is_centr[MXN*3];
set<int> tree[MXN*3];
int fi = MXN;
map<pair<int, int>, int> ew;

struct SegNode {
	int mul = 1;

	SegNode merge(SegNode other) {
		//cerr << mul << ' ' << other.mul << '\n';
		return {(mul * other.mul) % L};
	}
};


// retrieves multiple of range mod L
// point update multiply one value
struct SegTree {
	vec<SegNode> data;
	int n;
	SegTree(int in) {
		n = 1;
		while(n < in) n*=2;
		data = vec<SegNode>(n*2);
	}
	void upd(int i, SegNode val) {
		assert(i<n && i>=0);
		i += n;
		//cerr << "SZ: " << data.size() << ' ' << i <<  '\n';

		data[i] = data[i].merge(val);
		while(i > 1) {
			i /= 2;
			data[i] = data[i*2].merge(data[i*2+1]);
		}
	}

	SegNode query_suffix(int l) {
		assert(l<n && l >= 0);
		return _query_suffix(l, n, 1, 0, n);
	}
	SegNode _query_suffix(int l, int r, int ti, int tl, int tr) {
		if(l >= tr || r <= tl) {
			return {};
		}
		if(l <= tl && r >= tr) {
			return data[ti];
		}
		int tm = (tl + tr)/2;
		return _query_suffix(l, r, ti*2, tl, tm).merge(_query_suffix(l, r, ti*2+1, tm, tr));
	}
};

struct Centroid {
	vec<SegTree> subtree_contrs{};
	hmap<int, int> subtree_inds;
	hmap<int, int> dists;
	int root;
	int size;
	SegTree contr;

	Centroid() : contr(1) {}

	Centroid(int root, int size) : root(root), size(size), contr(size+1) {
		is_centr[root] = true;
		subtree_inds[root] = -1;
		if(root < N) contr.upd(0, {H[root]});
		dists[root] = 0;

		int si = 0;
		for(int u : tree[root]) {
			if(is_centr[u]) continue;

			subtree_contrs.push_back(SegTree(size+1));
			dfs_init(u, root, ew[{u, root}], si++);
		}
	}

	void dfs_init(int u, int p, int d, int s_i) {
		if(is_centr[u]) return;
		subtree_inds[u] = s_i;
		dists[u] = d;
		for(int v : tree[u]) {
			if(v == p) continue;
			dfs_init(v, u, d+ew[{u, v}], s_i);
		}
	}
};

Centroid centroids[MXN*3];
int centroid_pars[MXN*3];
int subtree_sz[MXN*3];

void comp_subtree_sz(int u, int p = -1) {
	if(is_centr[u]) {
		subtree_sz[u] = 0;
		return;
	}
	subtree_sz[u] = 1;
	for(int v : tree[u]) {
		if(v == p) continue;
		comp_subtree_sz(v, u);
		subtree_sz[u] += subtree_sz[v];
	}
}

int find_centroid(int u, int p, int mxsz) {
	for(int v : tree[u]) {
		if(v == p) continue;
		if(subtree_sz[v] > mxsz) return find_centroid(v, u, mxsz);
	}
	return u;
}

void decompose(int u, int p = -1) {
	if(is_centr[u]) return;
	comp_subtree_sz(u);
	int v = find_centroid(u, -1, subtree_sz[u]/2);
	///cerr << "initializing centroid: " << v << '\n';
	centroid_pars[v] = p;
	centroids[v] = Centroid(v, subtree_sz[u]);
	for(int w : tree[v]) {
		decompose(w, v);
	}
}

void make_tree_binary(int u, int p = -1) {
	vec<int> ch{};
	for(int v : tree[u]) {
		if(v==p) continue;
		ch.push_back(v);
	}
	if(ch.size() > 2) {
		int p2 = 1;
		while(p2 < ch.size()) {
			p2 *= 2;
		}
		int root = fi;
		tree[u].insert(root);
		tree[root].insert(u);
		for(int i = 2; i<p2; i++) {
			tree[i/2+fi-1].insert(i+fi-1);
			tree[i+fi-1].insert(i/2+fi-1);
		}
		for(int i = p2; i<p2+ch.size(); i++) {
			tree[i/2+fi-1].insert(ch[i-p2]);
			tree[ch[i-p2]].insert(i/2+fi-1);
			ew[{i/2+fi-1, ch[i-p2]}] = 1;
			ew[{ch[i-p2], i/2+fi-1}] = 1;
			tree[ch[i-p2]].erase(u);
			tree[u].erase(ch[i-p2]);
		}
		fi += p2-1;
	}
	for(int v : tree[u]) {
		if(v == p) continue;
		make_tree_binary(v, u);
	}
}



int32_t main() {
	cin >> N >> L;
	for(int i = 0; i<N-1; i++) {
		int u, v;
		cin >> u >> v;
		u--;v--;
		tree[u].insert(v);
		tree[v].insert(u);
		ew[{u, v}] = 1;
		ew[{v, u}] = 1;
	}
	for(int i = 0; i<N; i++) {
		cin >> H[i];
	}

	make_tree_binary(0);
	if(false) {
	for(int i = 0; i<MXN*3; i++) {
		if(tree[i].size() > 0) {
			cerr << i << ":" << ' ';
			for(int v : tree[i]) cerr << v << ' ';
			cerr << '\n';
		}
	}
	}

	decompose(0);


	int Q;
	cin >> Q;
	while(Q--) {
	//cerr << "HERE0" << '\n';
		int t;
		cin >> t;
		if(t == 2) {
		//cerr << "Here1" << '\n';
			int u;
			cin >> u;
			u--;
			int ans = 1;
			int ci = u;
			auto mult_ans = [&](int val) {
				ans *= val;
				ans %= L;
			};
			while(ci != -1) {
				int d = centroids[ci].dists[u];
				mult_ans(centroids[ci].contr.query_suffix(d).mul);

				for(int i = 0; i<centroids[ci].subtree_contrs.size(); i++) {
					if(centroids[ci].subtree_inds[u] != i) {
						mult_ans(centroids[ci].subtree_contrs[i].query_suffix(d).mul);
					}
				}

				ci = centroid_pars[ci];
				//cerr << ci << '\n';
			};
			cout << ans << '\n';
		}
		else {
			//cerr <<"HERE2" << '\n';
			int u, d, w;
			cin >> u >> d >> w;
			u--;
			centroids[u].contr.upd(min(centroids[u].contr.n-1, d), {w});
			int ci = centroid_pars[u];
			while(ci != -1) {
				//cerr << "Cur Centroid: " << ci << '\n';
				auto& c = centroids[ci];
				int contr_d = d - c.dists[u];
				if(contr_d < 0) {
					ci = centroid_pars[ci];
					continue;
				}
				auto& st = c.subtree_contrs[c.subtree_inds[u]];
				contr_d = min(contr_d, st.n-1);
				//cerr << st.n << '\n';
				st.upd(contr_d, {w});

				ci = centroid_pars[ci];
				//cerr << ci << '\n';
			}
		}
	}


}

Compilation message

sprinkler.cpp: In function 'void make_tree_binary(long long int, long long int)':
sprinkler.cpp:146:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  146 |   while(p2 < ch.size()) {
      |         ~~~^~~~~~~~~~~
sprinkler.cpp:156:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long long unsigned int' [-Wsign-compare]
  156 |   for(int i = p2; i<p2+ch.size(); i++) {
      |                   ~^~~~~~~~~~~~~
sprinkler.cpp: In function 'int32_t main()':
sprinkler.cpp:224:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<SegTree>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  224 |     for(int i = 0; i<centroids[ci].subtree_contrs.size(); i++) {
      |                    ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 158548 KB Output is correct
2 Correct 36 ms 158544 KB Output is correct
3 Correct 35 ms 158544 KB Output is correct
4 Correct 44 ms 160340 KB Output is correct
5 Correct 43 ms 162984 KB Output is correct
6 Correct 44 ms 163404 KB Output is correct
7 Correct 43 ms 163668 KB Output is correct
8 Correct 46 ms 164176 KB Output is correct
9 Correct 35 ms 158552 KB Output is correct
10 Correct 34 ms 158696 KB Output is correct
11 Correct 34 ms 158572 KB Output is correct
12 Correct 35 ms 158544 KB Output is correct
13 Correct 35 ms 158552 KB Output is correct
14 Correct 36 ms 158556 KB Output is correct
15 Correct 34 ms 158556 KB Output is correct
16 Correct 35 ms 158556 KB Output is correct
17 Correct 34 ms 158660 KB Output is correct
18 Correct 35 ms 158552 KB Output is correct
19 Correct 35 ms 158556 KB Output is correct
20 Correct 35 ms 158628 KB Output is correct
21 Correct 35 ms 158544 KB Output is correct
22 Correct 39 ms 158548 KB Output is correct
23 Correct 35 ms 158556 KB Output is correct
24 Correct 35 ms 158544 KB Output is correct
25 Correct 34 ms 158552 KB Output is correct
26 Correct 37 ms 158544 KB Output is correct
27 Correct 36 ms 158556 KB Output is correct
28 Correct 35 ms 158628 KB Output is correct

Subtask #2
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 158552 KB Output is correct
2 Execution timed out 4088 ms 840176 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 158552 KB Output is correct
2 Execution timed out 4088 ms 840176 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 158548 KB Output is correct
2 Execution timed out 4058 ms 777204 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 158552 KB Output is correct
2 Execution timed out 4051 ms 764960 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 158548 KB Output is correct
2 Correct 36 ms 158544 KB Output is correct
3 Correct 35 ms 158544 KB Output is correct
4 Correct 44 ms 160340 KB Output is correct
5 Correct 43 ms 162984 KB Output is correct
6 Correct 44 ms 163404 KB Output is correct
7 Correct 43 ms 163668 KB Output is correct
8 Correct 46 ms 164176 KB Output is correct
9 Correct 35 ms 158552 KB Output is correct
10 Correct 34 ms 158696 KB Output is correct
11 Correct 34 ms 158572 KB Output is correct
12 Correct 35 ms 158544 KB Output is correct
13 Correct 35 ms 158552 KB Output is correct
14 Correct 36 ms 158556 KB Output is correct
15 Correct 34 ms 158556 KB Output is correct
16 Correct 35 ms 158556 KB Output is correct
17 Correct 34 ms 158660 KB Output is correct
18 Correct 35 ms 158552 KB Output is correct
19 Correct 35 ms 158556 KB Output is correct
20 Correct 35 ms 158628 KB Output is correct
21 Correct 35 ms 158544 KB Output is correct
22 Correct 39 ms 158548 KB Output is correct
23 Correct 35 ms 158556 KB Output is correct
24 Correct 35 ms 158544 KB Output is correct
25 Correct 34 ms 158552 KB Output is correct
26 Correct 37 ms 158544 KB Output is correct
27 Correct 36 ms 158556 KB Output is correct
28 Correct 35 ms 158628 KB Output is correct
29 Correct 33 ms 158552 KB Output is correct
30 Execution timed out 4088 ms 840176 KB Time limit exceeded
31 Halted 0 ms 0 KB -