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Submission #465366

# Submission time Handle Problem Language Result Execution time Memory
465366 2021-08-15T17:47:22 Z dutch Werewolf (IOI18_werewolf) C++17
100 / 100
 1415 ms 147856 KB 
#include <bits/stdc++.h>
using namespace std;
#include "werewolf.h"
typedef vector<int> vi;

const int NL = 2e5, ML = 6e5, LOG = 21;

int N, M, Q, k, dfsTimer;
int e[NL], r[NL], p[2][LOG][ML], st[2*NL], tL[2][ML], tR[2][ML];
array<int, 2> g[2*NL];

int find(int u){
	return e[u] < 0 ? u : e[u] = find(e[u]);
}

void dfs(int u){
	if(u < N){
		tL[k][u] = ++dfsTimer;
	}else{
		tL[k][u] = 1+dfsTimer;
		auto &[vL, vR] = g[u-N];
		dfs(vL);
		if(vL != vR) dfs(vR);	
	}
	tR[k][u] = dfsTimer;
}

vi check_validity(int __N, vi X, vi Y, vi S, vi E, vi L, vi R){
	N = __N, Q = size(S), M = size(X);
	for(int i=0; i<M; ++i)
		if(X[i] > Y[i]) swap(X[i], Y[i]);
	
	vi h(M);
	iota(begin(h), end(h), 0);

	for(; k<2; ++k){
		sort(begin(h), end(h), [&](int &u, int &v){
			return k ? X[u] > X[v] : Y[u] < Y[v];
		});
		iota(r, r+N, 0);
		fill(e, e+N,-1);

		for(int &i : h){
			int u = find(X[i]), v = find(Y[i]);

			p[k][0][r[u]] = i+N;
			p[k][0][r[v]] = i+N;
			g[i] = {r[u], r[v]};

			if(e[u] > e[v]) swap(u, v);
			if(u != v){
				e[u] += e[v];
				e[v] = u;
			}
			r[u] = i+N;
		}

		dfsTimer = -1;
		dfs(p[k][0][h.back()+N] = h.back()+N);

		for(int i=0; i+1<LOG; ++i)
			for(int u=0; u<N+M; ++u)
				p[k][i+1][u] = p[k][i][p[k][i][u]];
	}

	vector<array<int, 3>> q(Q);

	for(int i=0; i<Q; ++i){
		int u = E[i];
		for(int j=LOG; --j>=0; )
			if(Y[p[0][j][u] - N] <= R[i]) u = p[0][j][u];
 		q[i] = {tL[0][u], tR[0][u], i};
	}

	vi byL(N), res(Q); int pt = N-1;
	iota(begin(byL), end(byL), 0);
	sort(begin(byL), end(byL), [&](int u, int v){
		return tL[0][u] < tL[0][v];
	});
	sort(rbegin(q), rend(q));

	fill(st, st+N+N, ML);
	for(auto &[lx, rx, id] : q){
		while(pt>=0 && tL[0][byL[pt]] >= lx){
			int i = tL[1][byL[pt]];
			for(st[i+=N]=tL[0][byL[pt]]; i/=2; )
				st[i] = min(st[2*i], st[2*i+1]);
			--pt;
		}
		int u = S[id];
		for(int j=LOG; --j>=0; )
			if(X[p[1][j][u] - N] >= L[id]) u = p[1][j][u];
		
		int qL = tL[1][u], qR = tR[1][u], x = N+N;

		for(qL+=N, qR+=N+1; qL<qR; qL/=2, qR/=2){
			if(qL & 1) x = min(x, st[qL++]);
			if(qR & 1) x = min(x, st[--qR]);
		}
		res[id] = x <= rx;
	}
	return res;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 588 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 588 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 7 ms 2216 KB Output is correct
11 Correct 7 ms 2124 KB Output is correct
12 Correct 6 ms 2124 KB Output is correct
13 Correct 7 ms 2252 KB Output is correct
14 Correct 6 ms 2252 KB Output is correct
15 Correct 10 ms 2892 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 738 ms 99864 KB Output is correct
2 Correct 1075 ms 102928 KB Output is correct
3 Correct 905 ms 100932 KB Output is correct
4 Correct 785 ms 100016 KB Output is correct
5 Correct 798 ms 99964 KB Output is correct
6 Correct 803 ms 99800 KB Output is correct
7 Correct 680 ms 99812 KB Output is correct
8 Correct 958 ms 102996 KB Output is correct
9 Correct 561 ms 101044 KB Output is correct
10 Correct 466 ms 99888 KB Output is correct
11 Correct 524 ms 99964 KB Output is correct
12 Correct 497 ms 100036 KB Output is correct
13 Correct 1162 ms 102984 KB Output is correct
14 Correct 1102 ms 102856 KB Output is correct
15 Correct 1099 ms 102940 KB Output is correct
16 Correct 1116 ms 102948 KB Output is correct
17 Correct 706 ms 99796 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 588 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 7 ms 2216 KB Output is correct
11 Correct 7 ms 2124 KB Output is correct
12 Correct 6 ms 2124 KB Output is correct
13 Correct 7 ms 2252 KB Output is correct
14 Correct 6 ms 2252 KB Output is correct
15 Correct 10 ms 2892 KB Output is correct
16 Correct 738 ms 99864 KB Output is correct
17 Correct 1075 ms 102928 KB Output is correct
18 Correct 905 ms 100932 KB Output is correct
19 Correct 785 ms 100016 KB Output is correct
20 Correct 798 ms 99964 KB Output is correct
21 Correct 803 ms 99800 KB Output is correct
22 Correct 680 ms 99812 KB Output is correct
23 Correct 958 ms 102996 KB Output is correct
24 Correct 561 ms 101044 KB Output is correct
25 Correct 466 ms 99888 KB Output is correct
26 Correct 524 ms 99964 KB Output is correct
27 Correct 497 ms 100036 KB Output is correct
28 Correct 1162 ms 102984 KB Output is correct
29 Correct 1102 ms 102856 KB Output is correct
30 Correct 1099 ms 102940 KB Output is correct
31 Correct 1116 ms 102948 KB Output is correct
32 Correct 706 ms 99796 KB Output is correct
33 Correct 901 ms 100588 KB Output is correct
34 Correct 1415 ms 117232 KB Output is correct
35 Correct 1142 ms 107432 KB Output is correct
36 Correct 861 ms 101572 KB Output is correct
37 Correct 1025 ms 104528 KB Output is correct
38 Correct 935 ms 102996 KB Output is correct
39 Correct 924 ms 106328 KB Output is correct
40 Correct 1263 ms 147856 KB Output is correct
41 Correct 780 ms 102932 KB Output is correct
42 Correct 551 ms 101440 KB Output is correct
43 Correct 1275 ms 128452 KB Output is correct
44 Correct 988 ms 104388 KB Output is correct
45 Correct 678 ms 108504 KB Output is correct
46 Correct 742 ms 106276 KB Output is correct
47 Correct 1136 ms 104200 KB Output is correct
48 Correct 1144 ms 103056 KB Output is correct
49 Correct 1135 ms 104184 KB Output is correct
50 Correct 1122 ms 103136 KB Output is correct
51 Correct 1268 ms 147548 KB Output is correct
52 Correct 1225 ms 147620 KB Output is correct