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Submission #956697

# Submission time Handle Problem Language Result Execution time Memory
956697 2024-04-02T10:59:47 Z Trisanu_Das Thousands Islands (IOI22_islands) C++17
100 / 100
 90 ms 19152 KB 
#include "islands.h"
#include <bits/stdc++.h>
#define eb emplace_back
#define sz(V) ((int)(V).size())
#define allv(V) ((V).begin()),((V).end())
#define delv(V,x) (V).erase(find(allv(V),(x)))
using namespace std;
 
const int MAXN = 100'055;
const int MAXM = 200'055;
 
vector<int> G[MAXN], T[MAXN];
 
int oc[MAXN];
bitset<MAXM> dead;
 
variant<bool, vector<int>> find_journey(int N, int M, vector<int> A, vector<int> B) {
	for(int i = M; i--;) {
		G[A[i]].eb(i);
		T[B[i]].eb(i);
		oc[A[i]]++;
	}
 
	vector<int> PV;
	int S = 0;
 
	vector<int> ZV;
	for(int i = N; i--;) if(!oc[i]) ZV.eb(i);
	while(1 == oc[S] || !ZV.empty()) {
		if(1 == oc[S]) {
			int e = *find_if(allv(G[S]), [&](int e){ return !dead[e]; });
			PV.eb(e);
			dead[e] = true;
			oc[S] = 0;
			ZV.eb(S);
			S = B[e];
		}
 
		int i = ZV.back(); ZV.pop_back();
 
		for(int e : T[i]) {
			dead[e] = true;
			int v = A[e];
			if(!--oc[v]) ZV.eb(v);
		}
	}
 
	for(int i = N; i--;) G[i].clear();
	for(int i = M; i--;) if(!dead[i]) G[A[i]].eb(i);
 
	if(G[S].empty()) return false;
 
	for(int i = N; i--;)
		G[i].resize(i == S ? 2 : 1);
	for(int i = M; i--;) A[i] ^= B[i];
 
	dead.reset();
 
	vector<int> CV;
	int pve = -1, v = S;
	do {
		for(int e : G[v]) if(e != pve) {
			CV.eb(e);
			pve = e;
			dead[e] = !dead[e];
			delv(G[v], e);
			v ^= A[e];
			G[v].eb(e);
			break;
		}
	} while(v != S || dead.any());
 
	vector<int> r = PV;
	r.insert(r.end(), allv(CV));
	reverse(allv(PV));
	r.insert(r.end(), allv(PV));
	return r;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Correct 2 ms 5208 KB Output is correct
4 Correct 2 ms 5208 KB Output is correct
5 Correct 2 ms 5208 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 30 ms 11012 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Correct 1 ms 5212 KB Output is correct
4 Correct 2 ms 5464 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 30 ms 10704 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5464 KB Output is correct
2 Correct 1 ms 5212 KB Output is correct
3 Correct 1 ms 5212 KB Output is correct
4 Correct 1 ms 5212 KB Output is correct
5 Correct 2 ms 5468 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 2 ms 5208 KB Output is correct
8 Correct 2 ms 5212 KB Output is correct
9 Correct 2 ms 5208 KB Output is correct
10 Correct 3 ms 5464 KB Output is correct
11 Correct 2 ms 5212 KB Output is correct
12 Correct 2 ms 5468 KB Output is correct
13 Correct 2 ms 5212 KB Output is correct
14 Correct 1 ms 5212 KB Output is correct
15 Correct 2 ms 5464 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 16 ms 8796 KB Output is correct
18 Correct 14 ms 8312 KB Output is correct
19 Correct 1 ms 5208 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 2 ms 5468 KB Output is correct
22 Correct 2 ms 5212 KB Output is correct
23 Correct 26 ms 10624 KB Output is correct

Subtask #4
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5384 KB Output is correct
2 Correct 2 ms 5468 KB Output is correct
3 Correct 26 ms 11088 KB Output is correct
4 Correct 32 ms 11608 KB Output is correct
5 Correct 3 ms 5464 KB Output is correct
6 Correct 2 ms 5464 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 1 ms 5212 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 2 ms 5468 KB Output is correct
11 Correct 2 ms 5468 KB Output is correct
12 Correct 2 ms 5468 KB Output is correct
13 Correct 2 ms 5444 KB Output is correct
14 Correct 2 ms 5468 KB Output is correct
15 Correct 3 ms 5464 KB Output is correct
16 Correct 2 ms 5468 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 4 ms 5436 KB Output is correct
19 Correct 2 ms 5464 KB Output is correct
20 Correct 29 ms 11868 KB Output is correct
21 Correct 28 ms 11640 KB Output is correct
22 Correct 2 ms 5464 KB Output is correct
23 Correct 2 ms 5212 KB Output is correct
24 Correct 2 ms 5208 KB Output is correct
25 Correct 2 ms 5464 KB Output is correct
26 Correct 2 ms 5464 KB Output is correct
27 Correct 30 ms 11856 KB Output is correct
28 Correct 29 ms 11856 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 36 ms 12632 KB Output is correct
31 Correct 2 ms 5212 KB Output is correct
32 Correct 29 ms 11868 KB Output is correct
33 Correct 27 ms 11612 KB Output is correct
34 Correct 18 ms 8720 KB Output is correct
35 Correct 2 ms 5380 KB Output is correct
36 Correct 29 ms 10912 KB Output is correct
37 Correct 28 ms 12372 KB Output is correct
38 Correct 6 ms 5472 KB Output is correct
39 Correct 25 ms 11088 KB Output is correct
40 Correct 3 ms 5468 KB Output is correct
41 Correct 30 ms 12856 KB Output is correct
42 Correct 30 ms 12112 KB Output is correct
43 Correct 1 ms 5212 KB Output is correct
44 Correct 2 ms 5468 KB Output is correct
45 Correct 2 ms 5468 KB Output is correct
46 Correct 16 ms 8392 KB Output is correct

Subtask #5
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5208 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Correct 2 ms 5208 KB Output is correct
4 Correct 2 ms 5208 KB Output is correct
5 Correct 2 ms 5208 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 30 ms 11012 KB Output is correct
8 Correct 2 ms 5208 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 2 ms 5464 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 30 ms 10704 KB Output is correct
14 Correct 2 ms 5464 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 2 ms 5468 KB Output is correct
19 Correct 1 ms 5212 KB Output is correct
20 Correct 2 ms 5208 KB Output is correct
21 Correct 2 ms 5212 KB Output is correct
22 Correct 2 ms 5208 KB Output is correct
23 Correct 3 ms 5464 KB Output is correct
24 Correct 2 ms 5212 KB Output is correct
25 Correct 2 ms 5468 KB Output is correct
26 Correct 2 ms 5212 KB Output is correct
27 Correct 1 ms 5212 KB Output is correct
28 Correct 2 ms 5464 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 16 ms 8796 KB Output is correct
31 Correct 14 ms 8312 KB Output is correct
32 Correct 1 ms 5208 KB Output is correct
33 Correct 1 ms 5212 KB Output is correct
34 Correct 2 ms 5468 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 26 ms 10624 KB Output is correct
37 Correct 1 ms 5208 KB Output is correct
38 Correct 1 ms 5212 KB Output is correct
39 Correct 2 ms 5208 KB Output is correct
40 Correct 2 ms 5208 KB Output is correct
41 Correct 14 ms 8284 KB Output is correct
42 Correct 2 ms 5468 KB Output is correct
43 Correct 27 ms 11468 KB Output is correct
44 Correct 26 ms 11468 KB Output is correct
45 Correct 27 ms 11472 KB Output is correct
46 Correct 1 ms 5212 KB Output is correct
47 Correct 1 ms 5208 KB Output is correct
48 Correct 2 ms 5208 KB Output is correct
49 Correct 2 ms 5468 KB Output is correct
50 Correct 80 ms 17736 KB Output is correct
51 Correct 57 ms 17492 KB Output is correct
52 Correct 62 ms 17100 KB Output is correct
53 Correct 57 ms 17096 KB Output is correct
54 Correct 70 ms 17612 KB Output is correct
55 Correct 60 ms 17452 KB Output is correct
56 Correct 55 ms 17484 KB Output is correct
57 Correct 41 ms 15560 KB Output is correct
58 Correct 90 ms 17600 KB Output is correct
59 Correct 59 ms 16724 KB Output is correct
60 Correct 55 ms 16212 KB Output is correct
61 Correct 71 ms 16272 KB Output is correct
62 Correct 13 ms 8028 KB Output is correct
63 Correct 51 ms 16084 KB Output is correct
64 Correct 19 ms 9304 KB Output is correct
65 Correct 2 ms 5208 KB Output is correct
66 Correct 2 ms 5212 KB Output is correct
67 Correct 58 ms 16920 KB Output is correct
68 Correct 33 ms 12880 KB Output is correct
69 Correct 38 ms 12732 KB Output is correct
70 Correct 2 ms 5464 KB Output is correct
71 Correct 38 ms 13068 KB Output is correct
72 Correct 2 ms 5208 KB Output is correct
73 Correct 53 ms 15516 KB Output is correct
74 Correct 72 ms 17396 KB Output is correct
75 Correct 4 ms 5724 KB Output is correct
76 Correct 30 ms 10960 KB Output is correct
77 Correct 40 ms 15052 KB Output is correct
78 Correct 58 ms 16208 KB Output is correct
79 Correct 2 ms 5208 KB Output is correct
80 Correct 87 ms 19152 KB Output is correct
81 Correct 2 ms 5468 KB Output is correct
82 Correct 27 ms 11316 KB Output is correct
83 Correct 2 ms 5468 KB Output is correct
84 Correct 1 ms 5212 KB Output is correct
85 Correct 30 ms 11228 KB Output is correct
86 Correct 2 ms 5468 KB Output is correct
87 Correct 3 ms 6360 KB Output is correct
88 Correct 3 ms 5464 KB Output is correct
89 Correct 66 ms 16212 KB Output is correct
90 Correct 64 ms 16468 KB Output is correct
91 Correct 83 ms 18640 KB Output is correct
92 Correct 1 ms 5208 KB Output is correct