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Submission #236142

# Submission time Handle Problem Language Result Execution time Memory
236142 2020-05-31T09:32:49 Z oolimry Bitaro’s Party (JOI18_bitaro) C++14
100 / 100
 1532 ms 141052 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 = 100;

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 5120 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 9 ms 5504 KB Output is correct
8 Correct 11 ms 6144 KB Output is correct
9 Correct 11 ms 6144 KB Output is correct
10 Correct 11 ms 6144 KB Output is correct
11 Correct 11 ms 6016 KB Output is correct
12 Correct 10 ms 5888 KB Output is correct
13 Correct 11 ms 6016 KB Output is correct
14 Correct 10 ms 5632 KB Output is correct
15 Correct 10 ms 5632 KB Output is correct
16 Correct 10 ms 5760 KB Output is correct
17 Correct 10 ms 5760 KB Output is correct
18 Correct 10 ms 5760 KB Output is correct
19 Correct 11 ms 5760 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 5120 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 9 ms 5504 KB Output is correct
8 Correct 11 ms 6144 KB Output is correct
9 Correct 11 ms 6144 KB Output is correct
10 Correct 11 ms 6144 KB Output is correct
11 Correct 11 ms 6016 KB Output is correct
12 Correct 10 ms 5888 KB Output is correct
13 Correct 11 ms 6016 KB Output is correct
14 Correct 10 ms 5632 KB Output is correct
15 Correct 10 ms 5632 KB Output is correct
16 Correct 10 ms 5760 KB Output is correct
17 Correct 10 ms 5760 KB Output is correct
18 Correct 10 ms 5760 KB Output is correct
19 Correct 11 ms 5760 KB Output is correct
20 Correct 159 ms 7160 KB Output is correct
21 Correct 158 ms 7240 KB Output is correct
22 Correct 159 ms 7144 KB Output is correct
23 Correct 149 ms 7160 KB Output is correct
24 Correct 480 ms 112376 KB Output is correct
25 Correct 460 ms 108280 KB Output is correct
26 Correct 483 ms 108028 KB Output is correct
27 Correct 423 ms 114220 KB Output is correct
28 Correct 415 ms 114420 KB Output is correct
29 Correct 435 ms 115488 KB Output is correct
30 Correct 444 ms 111608 KB Output is correct
31 Correct 502 ms 129400 KB Output is correct
32 Correct 425 ms 111728 KB Output is correct
33 Correct 339 ms 75636 KB Output is correct
34 Correct 398 ms 103040 KB Output is correct
35 Correct 328 ms 75380 KB Output is correct
36 Correct 391 ms 92276 KB Output is correct
37 Correct 463 ms 112804 KB Output is correct
38 Correct 372 ms 92412 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 5120 KB Output is correct
5 Correct 9 ms 5504 KB Output is correct
6 Correct 9 ms 5504 KB Output is correct
7 Correct 9 ms 5504 KB Output is correct
8 Correct 11 ms 6144 KB Output is correct
9 Correct 11 ms 6144 KB Output is correct
10 Correct 11 ms 6144 KB Output is correct
11 Correct 11 ms 6016 KB Output is correct
12 Correct 10 ms 5888 KB Output is correct
13 Correct 11 ms 6016 KB Output is correct
14 Correct 10 ms 5632 KB Output is correct
15 Correct 10 ms 5632 KB Output is correct
16 Correct 10 ms 5760 KB Output is correct
17 Correct 10 ms 5760 KB Output is correct
18 Correct 10 ms 5760 KB Output is correct
19 Correct 11 ms 5760 KB Output is correct
20 Correct 159 ms 7160 KB Output is correct
21 Correct 158 ms 7240 KB Output is correct
22 Correct 159 ms 7144 KB Output is correct
23 Correct 149 ms 7160 KB Output is correct
24 Correct 480 ms 112376 KB Output is correct
25 Correct 460 ms 108280 KB Output is correct
26 Correct 483 ms 108028 KB Output is correct
27 Correct 423 ms 114220 KB Output is correct
28 Correct 415 ms 114420 KB Output is correct
29 Correct 435 ms 115488 KB Output is correct
30 Correct 444 ms 111608 KB Output is correct
31 Correct 502 ms 129400 KB Output is correct
32 Correct 425 ms 111728 KB Output is correct
33 Correct 339 ms 75636 KB Output is correct
34 Correct 398 ms 103040 KB Output is correct
35 Correct 328 ms 75380 KB Output is correct
36 Correct 391 ms 92276 KB Output is correct
37 Correct 463 ms 112804 KB Output is correct
38 Correct 372 ms 92412 KB Output is correct
39 Correct 586 ms 112888 KB Output is correct
40 Correct 522 ms 108792 KB Output is correct
41 Correct 534 ms 110840 KB Output is correct
42 Correct 518 ms 109560 KB Output is correct
43 Correct 505 ms 111096 KB Output is correct
44 Correct 198 ms 7676 KB Output is correct
45 Correct 170 ms 7160 KB Output is correct
46 Correct 273 ms 7208 KB Output is correct
47 Correct 181 ms 7288 KB Output is correct
48 Correct 147 ms 7228 KB Output is correct
49 Correct 531 ms 111480 KB Output is correct
50 Correct 1532 ms 115960 KB Output is correct
51 Correct 203 ms 7556 KB Output is correct
52 Correct 278 ms 7160 KB Output is correct
53 Correct 523 ms 91644 KB Output is correct
54 Correct 555 ms 110584 KB Output is correct
55 Correct 1037 ms 91768 KB Output is correct
56 Correct 1002 ms 115064 KB Output is correct
57 Correct 208 ms 7544 KB Output is correct
58 Correct 206 ms 7544 KB Output is correct
59 Correct 279 ms 7288 KB Output is correct
60 Correct 268 ms 7160 KB Output is correct
61 Correct 661 ms 115936 KB Output is correct
62 Correct 562 ms 92124 KB Output is correct
63 Correct 550 ms 109664 KB Output is correct
64 Correct 1140 ms 115804 KB Output is correct
65 Correct 867 ms 91768 KB Output is correct
66 Correct 706 ms 112120 KB Output is correct
67 Correct 1429 ms 116016 KB Output is correct
68 Correct 1054 ms 92280 KB Output is correct
69 Correct 929 ms 111736 KB Output is correct
70 Correct 490 ms 115556 KB Output is correct
71 Correct 422 ms 92024 KB Output is correct
72 Correct 506 ms 111480 KB Output is correct
73 Correct 528 ms 115704 KB Output is correct
74 Correct 458 ms 91896 KB Output is correct
75 Correct 530 ms 114680 KB Output is correct
76 Correct 531 ms 111608 KB Output is correct
77 Correct 1500 ms 116112 KB Output is correct
78 Correct 440 ms 115608 KB Output is correct
79 Correct 207 ms 7544 KB Output is correct
80 Correct 265 ms 7288 KB Output is correct
81 Correct 143 ms 7160 KB Output is correct
82 Correct 555 ms 111352 KB Output is correct
83 Correct 624 ms 131192 KB Output is correct
84 Correct 1315 ms 112248 KB Output is correct
85 Correct 1073 ms 141052 KB Output is correct
86 Correct 451 ms 112248 KB Output is correct
87 Correct 525 ms 130116 KB Output is correct
88 Correct 193 ms 7544 KB Output is correct
89 Correct 198 ms 7544 KB Output is correct
90 Correct 275 ms 7160 KB Output is correct
91 Correct 277 ms 7160 KB Output is correct
92 Correct 158 ms 7160 KB Output is correct
93 Correct 158 ms 7160 KB Output is correct
94 Correct 440 ms 75624 KB Output is correct
95 Correct 512 ms 109304 KB Output is correct
96 Correct 932 ms 75416 KB Output is correct
97 Correct 932 ms 110456 KB Output is correct
98 Correct 363 ms 76028 KB Output is correct
99 Correct 431 ms 106488 KB Output is correct
100 Correct 215 ms 7544 KB Output is correct
101 Correct 214 ms 7544 KB Output is correct
102 Correct 249 ms 7160 KB Output is correct
103 Correct 249 ms 7160 KB Output is correct
104 Correct 152 ms 7160 KB Output is correct
105 Correct 166 ms 7288 KB Output is correct
106 Correct 493 ms 91896 KB Output is correct
107 Correct 580 ms 115960 KB Output is correct
108 Correct 983 ms 92280 KB Output is correct
109 Correct 865 ms 108284 KB Output is correct
110 Correct 406 ms 92588 KB Output is correct
111 Correct 472 ms 111864 KB Output is correct
112 Correct 211 ms 7544 KB Output is correct
113 Correct 210 ms 7672 KB Output is correct
114 Correct 266 ms 7160 KB Output is correct
115 Correct 271 ms 7160 KB Output is correct
116 Correct 159 ms 7160 KB Output is correct
117 Correct 150 ms 7160 KB Output is correct
118 Correct 451 ms 110840 KB Output is correct
119 Correct 419 ms 91860 KB Output is correct
120 Correct 503 ms 116344 KB Output is correct
121 Correct 461 ms 110900 KB Output is correct
122 Correct 423 ms 91512 KB Output is correct
123 Correct 502 ms 116472 KB Output is correct
124 Correct 453 ms 110840 KB Output is correct
125 Correct 412 ms 91952 KB Output is correct
126 Correct 494 ms 114508 KB Output is correct