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Submission #236140

# Submission time Handle Problem Language Result Execution time Memory
236140 2020-05-31T09:29:38 Z oolimry Bitaro’s Party (JOI18_bitaro) C++14
100 / 100
 1852 ms 218904 KB 
#include <bits/stdc++.h>
#define node second
#define dist first
#define all(x) x.begin(), x.end()
using namespace std;
typedef pair<int,int> ii;

const int B = 150;

vector<ii> best[100005];
vector<int> adj[100005];
bool ban[100005];
int memo[100005];
int vis[100005];
int inTemp[100005];

void dfs(int u){
	best[u].push_back(ii(0,u));
	
	for(int v : adj[u]){
		if(best[v].empty()) dfs(v);
		for(ii x : best[v]){
			int pos = inTemp[x.node];
			if(pos == 0){
				inTemp[x.node] = (int) best[u].size();
				best[u].push_back(ii(x.dist+1,x.node));
			}
			else{
				best[u][pos].dist = max(best[u][pos].dist,x.dist+1);
			}
		}
	}
	
	for(ii x : best[u]) inTemp[x.node] = 0;
	
	nth_element(best[u].begin(), best[u].begin() + B, best[u].end(), [&](ii a, ii b){ return a.dist > b.dist; });
	while(best[u].size() > B) best[u].pop_back();
	vis[u] = true;
}

int dfs2(int u){
	if(memo[u] != -1) return memo[u];
	
	int ans = 0;
	if(ban[u]) ans = -10234567;
	
	for(int v : adj[u]){
		ans = max(ans, dfs2(v)+1);
	}
	
	memo[u] = ans;
	
	return memo[u];
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	
	int n, m, Q; cin >> n >> m >> Q;
	fill(inTemp, inTemp+n+1, -1);
	
	while(m--){
		int u, v; cin >> u >> v;
		adj[v].push_back(u);
	}
	
	for(int i = 1;i <= n;i++){
		if(!vis[i]) dfs(i);
	}
		
	while(Q--){
		
		int t; cin >> t;
		int S; cin >> S;
		
		vector<int> cannot;
		
		for(int i = 0;i < S;i++){
			int x; cin >> x;
			cannot.push_back(x);
		}
		for(int x : cannot) ban[x] = true;
		
		if(S >= B){
			fill(memo, memo+n+1, -1);
			cout << max(-1, dfs2(t)) << "\n";
		}
		else{
			int ans = -1;
			for(ii x : best[t]){
				if(!ban[x.node]){
					ans = max(ans,x.dist);
				}
			}
			cout << ans << "\n";
		}	
		
		for(int x : cannot) ban[x] = false;
	}
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 7 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 4992 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 10 ms 5504 KB Output is correct
8 Correct 14 ms 7040 KB Output is correct
9 Correct 14 ms 7040 KB Output is correct
10 Correct 13 ms 7040 KB Output is correct
11 Correct 12 ms 6784 KB Output is correct
12 Correct 12 ms 6272 KB Output is correct
13 Correct 13 ms 6784 KB Output is correct
14 Correct 11 ms 6144 KB Output is correct
15 Correct 10 ms 5760 KB Output is correct
16 Correct 11 ms 6144 KB Output is correct
17 Correct 12 ms 6400 KB Output is correct
18 Correct 11 ms 6016 KB Output is correct
19 Correct 12 ms 6400 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 7 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 4992 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 10 ms 5504 KB Output is correct
8 Correct 14 ms 7040 KB Output is correct
9 Correct 14 ms 7040 KB Output is correct
10 Correct 13 ms 7040 KB Output is correct
11 Correct 12 ms 6784 KB Output is correct
12 Correct 12 ms 6272 KB Output is correct
13 Correct 13 ms 6784 KB Output is correct
14 Correct 11 ms 6144 KB Output is correct
15 Correct 10 ms 5760 KB Output is correct
16 Correct 11 ms 6144 KB Output is correct
17 Correct 12 ms 6400 KB Output is correct
18 Correct 11 ms 6016 KB Output is correct
19 Correct 12 ms 6400 KB Output is correct
20 Correct 211 ms 9208 KB Output is correct
21 Correct 213 ms 9336 KB Output is correct
22 Correct 207 ms 9436 KB Output is correct
23 Correct 219 ms 9336 KB Output is correct
24 Correct 582 ms 156788 KB Output is correct
25 Correct 584 ms 158528 KB Output is correct
26 Correct 605 ms 159224 KB Output is correct
27 Correct 605 ms 215520 KB Output is correct
28 Correct 586 ms 215804 KB Output is correct
29 Correct 612 ms 216696 KB Output is correct
30 Correct 635 ms 212896 KB Output is correct
31 Correct 694 ms 209780 KB Output is correct
32 Correct 624 ms 212996 KB Output is correct
33 Correct 444 ms 134964 KB Output is correct
34 Correct 512 ms 155640 KB Output is correct
35 Correct 448 ms 134140 KB Output is correct
36 Correct 529 ms 173948 KB Output is correct
37 Correct 585 ms 166772 KB Output is correct
38 Correct 525 ms 174452 KB Output is correct

Subtask #3
86.0 / 86.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 7 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 7 ms 4992 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 10 ms 5504 KB Output is correct
8 Correct 14 ms 7040 KB Output is correct
9 Correct 14 ms 7040 KB Output is correct
10 Correct 13 ms 7040 KB Output is correct
11 Correct 12 ms 6784 KB Output is correct
12 Correct 12 ms 6272 KB Output is correct
13 Correct 13 ms 6784 KB Output is correct
14 Correct 11 ms 6144 KB Output is correct
15 Correct 10 ms 5760 KB Output is correct
16 Correct 11 ms 6144 KB Output is correct
17 Correct 12 ms 6400 KB Output is correct
18 Correct 11 ms 6016 KB Output is correct
19 Correct 12 ms 6400 KB Output is correct
20 Correct 211 ms 9208 KB Output is correct
21 Correct 213 ms 9336 KB Output is correct
22 Correct 207 ms 9436 KB Output is correct
23 Correct 219 ms 9336 KB Output is correct
24 Correct 582 ms 156788 KB Output is correct
25 Correct 584 ms 158528 KB Output is correct
26 Correct 605 ms 159224 KB Output is correct
27 Correct 605 ms 215520 KB Output is correct
28 Correct 586 ms 215804 KB Output is correct
29 Correct 612 ms 216696 KB Output is correct
30 Correct 635 ms 212896 KB Output is correct
31 Correct 694 ms 209780 KB Output is correct
32 Correct 624 ms 212996 KB Output is correct
33 Correct 444 ms 134964 KB Output is correct
34 Correct 512 ms 155640 KB Output is correct
35 Correct 448 ms 134140 KB Output is correct
36 Correct 529 ms 173948 KB Output is correct
37 Correct 585 ms 166772 KB Output is correct
38 Correct 525 ms 174452 KB Output is correct
39 Correct 717 ms 157472 KB Output is correct
40 Correct 655 ms 156536 KB Output is correct
41 Correct 658 ms 157688 KB Output is correct
42 Correct 654 ms 157832 KB Output is correct
43 Correct 647 ms 158212 KB Output is correct
44 Correct 264 ms 9720 KB Output is correct
45 Correct 224 ms 9464 KB Output is correct
46 Correct 210 ms 9336 KB Output is correct
47 Correct 230 ms 9336 KB Output is correct
48 Correct 206 ms 9336 KB Output is correct
49 Correct 755 ms 212820 KB Output is correct
50 Correct 658 ms 212216 KB Output is correct
51 Correct 249 ms 10732 KB Output is correct
52 Correct 214 ms 9848 KB Output is correct
53 Correct 661 ms 175352 KB Output is correct
54 Correct 743 ms 166520 KB Output is correct
55 Correct 580 ms 174072 KB Output is correct
56 Correct 654 ms 168312 KB Output is correct
57 Correct 260 ms 10744 KB Output is correct
58 Correct 262 ms 10744 KB Output is correct
59 Correct 210 ms 9848 KB Output is correct
60 Correct 212 ms 9848 KB Output is correct
61 Correct 879 ms 218624 KB Output is correct
62 Correct 766 ms 175352 KB Output is correct
63 Correct 706 ms 166008 KB Output is correct
64 Correct 1310 ms 218616 KB Output is correct
65 Correct 1080 ms 174608 KB Output is correct
66 Correct 864 ms 166780 KB Output is correct
67 Correct 1852 ms 218488 KB Output is correct
68 Correct 1329 ms 175224 KB Output is correct
69 Correct 1133 ms 165856 KB Output is correct
70 Correct 710 ms 218360 KB Output is correct
71 Correct 612 ms 175352 KB Output is correct
72 Correct 640 ms 166684 KB Output is correct
73 Correct 714 ms 218488 KB Output is correct
74 Correct 632 ms 175096 KB Output is correct
75 Correct 701 ms 167544 KB Output is correct
76 Correct 759 ms 215288 KB Output is correct
77 Correct 1144 ms 218904 KB Output is correct
78 Correct 624 ms 218516 KB Output is correct
79 Correct 259 ms 10872 KB Output is correct
80 Correct 259 ms 10228 KB Output is correct
81 Correct 208 ms 9680 KB Output is correct
82 Correct 756 ms 214996 KB Output is correct
83 Correct 833 ms 211960 KB Output is correct
84 Correct 1089 ms 214956 KB Output is correct
85 Correct 1006 ms 212024 KB Output is correct
86 Correct 611 ms 215212 KB Output is correct
87 Correct 687 ms 211652 KB Output is correct
88 Correct 278 ms 10872 KB Output is correct
89 Correct 265 ms 11000 KB Output is correct
90 Correct 259 ms 10052 KB Output is correct
91 Correct 249 ms 9976 KB Output is correct
92 Correct 221 ms 9596 KB Output is correct
93 Correct 206 ms 9592 KB Output is correct
94 Correct 563 ms 137336 KB Output is correct
95 Correct 649 ms 165380 KB Output is correct
96 Correct 844 ms 135828 KB Output is correct
97 Correct 860 ms 166676 KB Output is correct
98 Correct 487 ms 136460 KB Output is correct
99 Correct 540 ms 162288 KB Output is correct
100 Correct 290 ms 10928 KB Output is correct
101 Correct 284 ms 10872 KB Output is correct
102 Correct 262 ms 9960 KB Output is correct
103 Correct 269 ms 9976 KB Output is correct
104 Correct 227 ms 9592 KB Output is correct
105 Correct 229 ms 9592 KB Output is correct
106 Correct 679 ms 175608 KB Output is correct
107 Correct 730 ms 168056 KB Output is correct
108 Correct 968 ms 175864 KB Output is correct
109 Correct 854 ms 166416 KB Output is correct
110 Correct 570 ms 176248 KB Output is correct
111 Correct 621 ms 166708 KB Output is correct
112 Correct 246 ms 11004 KB Output is correct
113 Correct 265 ms 10872 KB Output is correct
114 Correct 260 ms 9976 KB Output is correct
115 Correct 276 ms 10104 KB Output is correct
116 Correct 210 ms 9592 KB Output is correct
117 Correct 195 ms 9592 KB Output is correct
118 Correct 679 ms 213496 KB Output is correct
119 Correct 609 ms 174968 KB Output is correct
120 Correct 666 ms 166892 KB Output is correct
121 Correct 699 ms 213500 KB Output is correct
122 Correct 599 ms 174332 KB Output is correct
123 Correct 683 ms 166776 KB Output is correct
124 Correct 703 ms 213656 KB Output is correct
125 Correct 639 ms 175352 KB Output is correct
126 Correct 649 ms 166904 KB Output is correct