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Submission #465388

# Submission time Handle Problem Language Result Execution time Memory
465388 2021-08-15T19:40:26 Z dutch Werewolf (IOI18_werewolf) C++17
100 / 100
 664 ms 42692 KB 
#include <bits/stdc++.h>
using namespace std;
#include "werewolf.h"
typedef vector<int> vi;
#define vii(Z) iota(begin(Z), end(Z), 0)
 
const int NL = 2e5, ML = 6e5;
 
int N, M, Q, k, dfsTimer;
int e[NL], r[NL], lca[2][NL], st[2*NL], tL[2][ML], tR[2][ML];
array<int, 2> g[ML];
 
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); vii(h);
	vi byE(Q); vii(byE);
	vi byS(Q); vii(byS);
 
	sort(begin(byS), end(byS), [&](int u, int v){ return L[u] < L[v]; });
	sort(begin(byE), end(byE), [&](int u, int v){ return R[u] > R[v]; });
 
	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]);
 
			if(k) while(!empty(byS) && L[byS.back()] > X[i]){
					lca[k][byS.back()] = r[find(S[byS.back()])];
					byS.pop_back();
			}else while(!empty(byE) && R[byE.back()] < Y[i]){
					lca[k][byE.back()] = r[find(E[byE.back()])];
					byE.pop_back();
			}
 
			if(e[u] > e[v]) swap(u, v);
			g[i] = {r[u], r[v]};
			if(u != v){
				e[u] += e[v];
				e[v] = u;
			}
			r[u] = i+N;
		}
 
		if(k) for(int &i : byS) lca[k][i] = h.back() + N;
		else  for(int &i : byE) lca[k][i] = h.back() + N;
 
		dfsTimer = -1;
		dfs(h.back()+N);
	}
 
	vector<array<int, 3>> q(Q);
 
	for(int i=0; i<Q; ++i)
 		q[i] = {tL[0][lca[0][i]], tR[0][lca[0][i]], i};
 
	vi byL(N), res(Q); int pt = N-1;
	vii(byL);
	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 qL = tL[1][lca[1][id]], qR = tR[1][lca[1][id]], 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 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 5 ms 844 KB Output is correct
11 Correct 5 ms 716 KB Output is correct
12 Correct 5 ms 716 KB Output is correct
13 Correct 5 ms 844 KB Output is correct
14 Correct 5 ms 844 KB Output is correct
15 Correct 7 ms 972 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 456 ms 28440 KB Output is correct
2 Correct 432 ms 31628 KB Output is correct
3 Correct 433 ms 29580 KB Output is correct
4 Correct 429 ms 28696 KB Output is correct
5 Correct 454 ms 28688 KB Output is correct
6 Correct 454 ms 28556 KB Output is correct
7 Correct 414 ms 28560 KB Output is correct
8 Correct 412 ms 31640 KB Output is correct
9 Correct 425 ms 29616 KB Output is correct
10 Correct 419 ms 28692 KB Output is correct
11 Correct 412 ms 28740 KB Output is correct
12 Correct 417 ms 28560 KB Output is correct
13 Correct 429 ms 31668 KB Output is correct
14 Correct 433 ms 31640 KB Output is correct
15 Correct 422 ms 31556 KB Output is correct
16 Correct 436 ms 31672 KB Output is correct
17 Correct 415 ms 28460 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 5 ms 844 KB Output is correct
11 Correct 5 ms 716 KB Output is correct
12 Correct 5 ms 716 KB Output is correct
13 Correct 5 ms 844 KB Output is correct
14 Correct 5 ms 844 KB Output is correct
15 Correct 7 ms 972 KB Output is correct
16 Correct 456 ms 28440 KB Output is correct
17 Correct 432 ms 31628 KB Output is correct
18 Correct 433 ms 29580 KB Output is correct
19 Correct 429 ms 28696 KB Output is correct
20 Correct 454 ms 28688 KB Output is correct
21 Correct 454 ms 28556 KB Output is correct
22 Correct 414 ms 28560 KB Output is correct
23 Correct 412 ms 31640 KB Output is correct
24 Correct 425 ms 29616 KB Output is correct
25 Correct 419 ms 28692 KB Output is correct
26 Correct 412 ms 28740 KB Output is correct
27 Correct 417 ms 28560 KB Output is correct
28 Correct 429 ms 31668 KB Output is correct
29 Correct 433 ms 31640 KB Output is correct
30 Correct 422 ms 31556 KB Output is correct
31 Correct 436 ms 31672 KB Output is correct
32 Correct 415 ms 28460 KB Output is correct
33 Correct 482 ms 29292 KB Output is correct
34 Correct 552 ms 42692 KB Output is correct
35 Correct 497 ms 32580 KB Output is correct
36 Correct 470 ms 29344 KB Output is correct
37 Correct 519 ms 31468 KB Output is correct
38 Correct 456 ms 30172 KB Output is correct
39 Correct 434 ms 34840 KB Output is correct
40 Correct 617 ms 40828 KB Output is correct
41 Correct 456 ms 30736 KB Output is correct
42 Correct 438 ms 29252 KB Output is correct
43 Correct 584 ms 39284 KB Output is correct
44 Correct 464 ms 31352 KB Output is correct
45 Correct 410 ms 35416 KB Output is correct
46 Correct 413 ms 34848 KB Output is correct
47 Correct 455 ms 31892 KB Output is correct
48 Correct 453 ms 31688 KB Output is correct
49 Correct 431 ms 31936 KB Output is correct
50 Correct 450 ms 31628 KB Output is correct
51 Correct 626 ms 40476 KB Output is correct
52 Correct 664 ms 40580 KB Output is correct