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Submission #741853

# Submission time Handle Problem Language Result Execution time Memory
741853 2023-05-15T02:11:17 Z Abrar_Al_Samit Werewolf (IOI18_werewolf) C++17
100 / 100
 633 ms 119700 KB 
#include<bits/stdc++.h>

#include "werewolf.h"
using namespace std;

const int nax = 2e5 + 10;
int rep1[nax], rep2[nax];
pair<int,int> x_co[nax * 2], y_co[nax * 2];
int tt;
int cnt[nax];

struct DSU {
	int par[nax], sz[nax];
	DSU() {
		for(int i=0; i<nax; ++i) {
			sz[i] = 1, par[i] = i;
		}
	}

	int find(int v) {
		return par[v] = (par[v]==v) ? v : find(par[v]);
	}
	void unite(int u, int v) {
		if(sz[u] < sz[v]) swap(u, v);
		par[v] = u;
		sz[u] += sz[v];
	}
	bool same(int u, int v) {
		return find(u) == find(v);
	}
};
struct KRT {
	DSU T;
	vector<int>tree[nax * 2];
	int N;
	int r[nax];

	KRT() {
		for(int i=0; i<nax; ++i) {
			r[i] = i;
		}
	}

	void add_edge(int u, int v) {
		if(T.same(u, v)) return;
		u = T.find(u), v = T.find(v);
		tree[N].push_back(r[u]);
		tree[N].push_back(r[v]);
		T.unite(u, v);

		r[T.find(u)] = N++;
	}
	int get_rep(int v) {
		return r[T.find(v)];
	}

} krt1, krt2;
struct BIT {
	int bit[nax];

	void add(int p) {
		while(p<nax) {
			bit[p]++;
			p += p & -p;
		}
	}
	int get(int p) {
		int ret = 0;
		while(p) {
			ret += bit[p];
			p -= p & -p;
		}
		return ret;
	}
	int get(int l, int r) {
		int ret = get(r);
		if(l) ret -= get(l-1);
		return ret;
	}
};

void DFS(int v, KRT *krt, pair<int,int> *co, int N) {
	co[v].first = tt;

	tt += v < N;
	for(int u : krt->tree[v]) {
		DFS(u, krt, co, N);
	}
	co[v].second = tt-1;
}
vector<int> check_validity(int N, vector<int> X, vector<int> Y,
                                vector<int> S, vector<int> E,
                                vector<int> L, vector<int> R) {

	int Q = S.size();
	int M = X.size();
	
	vector<pair<int,int>>edges;
	for(int i=0; i<M; ++i) {
		edges.emplace_back(X[i], Y[i]);
	}



	//build KRT1
	krt1.N = N;
	sort(edges.begin(), edges.end(), [&] (auto x, auto y) {
		return min(x.first, x.second) > min(y.first, y.second);
	});

	vector<int>whosL[nax];
	for(int i=0; i<Q; ++i) {
		whosL[L[i]].push_back(i);
	}

	for(int i=0; i<Q; ++i) {
		rep1[i] = S[i];
	}
	int at = 0;
	for(int i=N-1; i>=0; --i) {
		if(at < M && min(edges[at].first, edges[at].second)==i) {
			krt1.add_edge(edges[at].first, edges[at].second);
			++at;
			++i;
			continue;
		}
		for(int j : whosL[i]) {
			rep1[j] = krt1.get_rep(S[j]);
		}
	}


	//build KRT2
	krt2.N = N;
	sort(edges.begin(), edges.end(), [&] (auto x, auto y) {
		return max(x.first, x.second) < max(y.first, y.second);
	});	

	vector<int>whosR[nax];
	for(int i=0; i<Q; ++i) {
		whosR[R[i]].push_back(i);
	}

	for(int i=0; i<Q; ++i) {
		rep2[i] = E[i];
	}

	at = 0;
	for(int i=0; i<N; ++i) {
		if(at < M && max(edges[at].first, edges[at].second)==i) {
			krt2.add_edge(edges[at].first, edges[at].second);
			++at;
			--i;
			continue;
		}
		for(int j : whosR[i]) {
			rep2[j] = krt2.get_rep(E[j]);
		}

	}


	//rename nodes in KRT1
	tt = 0;
	DFS(krt1.N-1, &krt1, x_co, N);

	//rename nodes in KRT2
	tt = 0;
	DFS(krt2.N-1, &krt2, y_co, N);

	//get all points
	vector<int>x_to_y[nax];
	for(int i=0; i<N; ++i) {
		x_to_y[x_co[i].first].push_back(y_co[i].first);
	}
	vector<int>left_queries[nax], right_queries[nax];
	for(int i=0; i<Q; ++i) {
		left_queries[x_co[rep1[i]].first].push_back(i);
		right_queries[x_co[rep1[i]].second].push_back(i);
	}

	//sweep line
	BIT b;
	for(int i=0; i<N; ++i) {
		//handle left side of queries
		for(int j : left_queries[i]) {
			cnt[j] -= b.get(y_co[rep2[j]].first+1, y_co[rep2[j]].second+1);
		}

		//add points
		for(int y : x_to_y[i]) {
			b.add(y+1);
		}

		//handle right side of queries
		for(int j : right_queries[i]) {
			cnt[j] += b.get(y_co[rep2[j]].first+1, y_co[rep2[j]].second+1);
		}
	}

	//conclusion
	vector<int>ans(Q);
	for(int i=0; i<Q; ++i) {
		ans[i] = cnt[i] > 0;
	}
	return ans;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 48084 KB Output is correct
2 Correct 29 ms 48112 KB Output is correct
3 Correct 27 ms 48056 KB Output is correct
4 Correct 27 ms 48084 KB Output is correct
5 Correct 28 ms 47980 KB Output is correct
6 Correct 26 ms 48104 KB Output is correct
7 Correct 26 ms 48212 KB Output is correct
8 Correct 28 ms 48104 KB Output is correct
9 Correct 26 ms 48084 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 48084 KB Output is correct
2 Correct 29 ms 48112 KB Output is correct
3 Correct 27 ms 48056 KB Output is correct
4 Correct 27 ms 48084 KB Output is correct
5 Correct 28 ms 47980 KB Output is correct
6 Correct 26 ms 48104 KB Output is correct
7 Correct 26 ms 48212 KB Output is correct
8 Correct 28 ms 48104 KB Output is correct
9 Correct 26 ms 48084 KB Output is correct
10 Correct 33 ms 49024 KB Output is correct
11 Correct 33 ms 49016 KB Output is correct
12 Correct 38 ms 48824 KB Output is correct
13 Correct 34 ms 49056 KB Output is correct
14 Correct 31 ms 49108 KB Output is correct
15 Correct 32 ms 48972 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 605 ms 98000 KB Output is correct
2 Correct 424 ms 102472 KB Output is correct
3 Correct 411 ms 106568 KB Output is correct
4 Correct 431 ms 105036 KB Output is correct
5 Correct 445 ms 105176 KB Output is correct
6 Correct 495 ms 105916 KB Output is correct
7 Correct 479 ms 102756 KB Output is correct
8 Correct 390 ms 110780 KB Output is correct
9 Correct 368 ms 105128 KB Output is correct
10 Correct 407 ms 103116 KB Output is correct
11 Correct 388 ms 103224 KB Output is correct
12 Correct 443 ms 103716 KB Output is correct
13 Correct 440 ms 112452 KB Output is correct
14 Correct 408 ms 112436 KB Output is correct
15 Correct 412 ms 112472 KB Output is correct
16 Correct 420 ms 112440 KB Output is correct
17 Correct 441 ms 102696 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 48084 KB Output is correct
2 Correct 29 ms 48112 KB Output is correct
3 Correct 27 ms 48056 KB Output is correct
4 Correct 27 ms 48084 KB Output is correct
5 Correct 28 ms 47980 KB Output is correct
6 Correct 26 ms 48104 KB Output is correct
7 Correct 26 ms 48212 KB Output is correct
8 Correct 28 ms 48104 KB Output is correct
9 Correct 26 ms 48084 KB Output is correct
10 Correct 33 ms 49024 KB Output is correct
11 Correct 33 ms 49016 KB Output is correct
12 Correct 38 ms 48824 KB Output is correct
13 Correct 34 ms 49056 KB Output is correct
14 Correct 31 ms 49108 KB Output is correct
15 Correct 32 ms 48972 KB Output is correct
16 Correct 605 ms 98000 KB Output is correct
17 Correct 424 ms 102472 KB Output is correct
18 Correct 411 ms 106568 KB Output is correct
19 Correct 431 ms 105036 KB Output is correct
20 Correct 445 ms 105176 KB Output is correct
21 Correct 495 ms 105916 KB Output is correct
22 Correct 479 ms 102756 KB Output is correct
23 Correct 390 ms 110780 KB Output is correct
24 Correct 368 ms 105128 KB Output is correct
25 Correct 407 ms 103116 KB Output is correct
26 Correct 388 ms 103224 KB Output is correct
27 Correct 443 ms 103716 KB Output is correct
28 Correct 440 ms 112452 KB Output is correct
29 Correct 408 ms 112436 KB Output is correct
30 Correct 412 ms 112472 KB Output is correct
31 Correct 420 ms 112440 KB Output is correct
32 Correct 441 ms 102696 KB Output is correct
33 Correct 558 ms 108380 KB Output is correct
34 Correct 305 ms 83424 KB Output is correct
35 Correct 578 ms 112592 KB Output is correct
36 Correct 633 ms 107640 KB Output is correct
37 Correct 535 ms 111504 KB Output is correct
38 Correct 553 ms 108496 KB Output is correct
39 Correct 566 ms 119700 KB Output is correct
40 Correct 498 ms 113884 KB Output is correct
41 Correct 508 ms 108700 KB Output is correct
42 Correct 447 ms 103848 KB Output is correct
43 Correct 536 ms 116276 KB Output is correct
44 Correct 513 ms 109756 KB Output is correct
45 Correct 438 ms 115772 KB Output is correct
46 Correct 456 ms 115652 KB Output is correct
47 Correct 458 ms 112644 KB Output is correct
48 Correct 478 ms 112440 KB Output is correct
49 Correct 473 ms 112548 KB Output is correct
50 Correct 454 ms 112428 KB Output is correct
51 Correct 443 ms 111372 KB Output is correct
52 Correct 456 ms 111244 KB Output is correct