#include <bits/stdc++.h>
using namespace std;
struct loc{int x; int doge; int d; bool r;};
int N, M;
int b[30000], p[30000];
vector<int> graph[30000];
int dist[30000];
unordered_set<int> vis;
signed main(){
cin >> N >> M;
for(int i = 0; i < M; i++){
cin >> b[i] >> p[i];
graph[b[i]].push_back(i);
}
fill(dist, dist+N, -1);
deque<loc> q;
q.push_back({b[0], 0, 0, true});
q.push_back({b[0], 0, 0, false});
vis.reserve(7000000);
while(!q.empty()){
if(~dist[b[1]]) break;
int x = q.front().x, doge = q.front().doge, d = q.front().d;
bool r = q.front().r;
q.pop_front();
if(!(~dist[x])){
dist[x] = d;
for(int i : graph[x]){
q.push_front({x, i, d, true});
q.push_front({x, i, d, false});
}
}
int dv = p[doge];
if(!r) dv = -dv;
x += dv;
d++;
int id = x + 30000*p[doge] + 30000*30000*r;
if(x < 0 || x >= N || vis.find(id) != vis.end()) continue;
vis.insert(id);
if((int)vis.size() > 6000000) vis.erase(vis.begin());
q.push_back({x, doge, d, r});
}
cout << dist[b[1]] << endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
37 ms |
60140 KB |
Output is correct |
2 |
Correct |
38 ms |
60088 KB |
Output is correct |
3 |
Correct |
36 ms |
60156 KB |
Output is correct |
4 |
Correct |
38 ms |
60140 KB |
Output is correct |
5 |
Correct |
38 ms |
60140 KB |
Output is correct |
6 |
Correct |
36 ms |
60140 KB |
Output is correct |
7 |
Correct |
37 ms |
60140 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
37 ms |
60140 KB |
Output is correct |
2 |
Correct |
37 ms |
60140 KB |
Output is correct |
3 |
Correct |
37 ms |
60140 KB |
Output is correct |
4 |
Correct |
39 ms |
60140 KB |
Output is correct |
5 |
Correct |
37 ms |
60140 KB |
Output is correct |
6 |
Correct |
37 ms |
60140 KB |
Output is correct |
7 |
Correct |
36 ms |
60140 KB |
Output is correct |
8 |
Correct |
37 ms |
60140 KB |
Output is correct |
9 |
Correct |
38 ms |
60140 KB |
Output is correct |
10 |
Correct |
37 ms |
60140 KB |
Output is correct |
11 |
Correct |
37 ms |
60268 KB |
Output is correct |
12 |
Correct |
38 ms |
60268 KB |
Output is correct |
13 |
Correct |
38 ms |
60268 KB |
Output is correct |
14 |
Correct |
38 ms |
60396 KB |
Output is correct |
15 |
Correct |
37 ms |
60268 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
36 ms |
60140 KB |
Output is correct |
2 |
Correct |
38 ms |
60140 KB |
Output is correct |
3 |
Correct |
37 ms |
60160 KB |
Output is correct |
4 |
Correct |
38 ms |
60140 KB |
Output is correct |
5 |
Correct |
38 ms |
60140 KB |
Output is correct |
6 |
Correct |
37 ms |
60160 KB |
Output is correct |
7 |
Correct |
37 ms |
60140 KB |
Output is correct |
8 |
Correct |
37 ms |
60140 KB |
Output is correct |
9 |
Correct |
36 ms |
60140 KB |
Output is correct |
10 |
Correct |
37 ms |
60140 KB |
Output is correct |
11 |
Correct |
37 ms |
60268 KB |
Output is correct |
12 |
Correct |
39 ms |
60388 KB |
Output is correct |
13 |
Correct |
38 ms |
60268 KB |
Output is correct |
14 |
Correct |
38 ms |
60396 KB |
Output is correct |
15 |
Correct |
38 ms |
60268 KB |
Output is correct |
16 |
Correct |
38 ms |
60268 KB |
Output is correct |
17 |
Correct |
38 ms |
60416 KB |
Output is correct |
18 |
Correct |
38 ms |
60268 KB |
Output is correct |
19 |
Correct |
38 ms |
60268 KB |
Output is correct |
20 |
Correct |
41 ms |
60416 KB |
Output is correct |
21 |
Correct |
37 ms |
60268 KB |
Output is correct |
22 |
Correct |
37 ms |
60268 KB |
Output is correct |
23 |
Correct |
38 ms |
60396 KB |
Output is correct |
24 |
Correct |
40 ms |
60396 KB |
Output is correct |
25 |
Correct |
38 ms |
60268 KB |
Output is correct |
26 |
Correct |
37 ms |
60396 KB |
Output is correct |
27 |
Correct |
39 ms |
60396 KB |
Output is correct |
28 |
Correct |
40 ms |
60908 KB |
Output is correct |
29 |
Correct |
42 ms |
62060 KB |
Output is correct |
30 |
Correct |
39 ms |
60780 KB |
Output is correct |
31 |
Correct |
40 ms |
61164 KB |
Output is correct |
32 |
Correct |
39 ms |
60908 KB |
Output is correct |
33 |
Correct |
51 ms |
63980 KB |
Output is correct |
34 |
Correct |
43 ms |
62316 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
37 ms |
60140 KB |
Output is correct |
2 |
Correct |
38 ms |
60140 KB |
Output is correct |
3 |
Correct |
38 ms |
60140 KB |
Output is correct |
4 |
Correct |
37 ms |
60140 KB |
Output is correct |
5 |
Correct |
37 ms |
60140 KB |
Output is correct |
6 |
Correct |
36 ms |
60140 KB |
Output is correct |
7 |
Correct |
37 ms |
60268 KB |
Output is correct |
8 |
Correct |
37 ms |
60140 KB |
Output is correct |
9 |
Correct |
37 ms |
60140 KB |
Output is correct |
10 |
Correct |
37 ms |
60140 KB |
Output is correct |
11 |
Correct |
38 ms |
60268 KB |
Output is correct |
12 |
Correct |
38 ms |
60268 KB |
Output is correct |
13 |
Correct |
38 ms |
60396 KB |
Output is correct |
14 |
Correct |
39 ms |
60396 KB |
Output is correct |
15 |
Correct |
38 ms |
60268 KB |
Output is correct |
16 |
Correct |
37 ms |
60268 KB |
Output is correct |
17 |
Correct |
41 ms |
60396 KB |
Output is correct |
18 |
Correct |
40 ms |
60268 KB |
Output is correct |
19 |
Correct |
39 ms |
60268 KB |
Output is correct |
20 |
Correct |
43 ms |
60396 KB |
Output is correct |
21 |
Correct |
40 ms |
60268 KB |
Output is correct |
22 |
Correct |
46 ms |
60268 KB |
Output is correct |
23 |
Correct |
39 ms |
60396 KB |
Output is correct |
24 |
Correct |
38 ms |
60396 KB |
Output is correct |
25 |
Correct |
41 ms |
60268 KB |
Output is correct |
26 |
Correct |
38 ms |
60396 KB |
Output is correct |
27 |
Correct |
37 ms |
60396 KB |
Output is correct |
28 |
Correct |
38 ms |
60908 KB |
Output is correct |
29 |
Correct |
41 ms |
62060 KB |
Output is correct |
30 |
Correct |
39 ms |
60780 KB |
Output is correct |
31 |
Correct |
49 ms |
61164 KB |
Output is correct |
32 |
Correct |
43 ms |
60908 KB |
Output is correct |
33 |
Correct |
50 ms |
63980 KB |
Output is correct |
34 |
Correct |
46 ms |
62316 KB |
Output is correct |
35 |
Correct |
62 ms |
61676 KB |
Output is correct |
36 |
Correct |
42 ms |
60300 KB |
Output is correct |
37 |
Correct |
55 ms |
61676 KB |
Output is correct |
38 |
Correct |
59 ms |
61292 KB |
Output is correct |
39 |
Correct |
57 ms |
60908 KB |
Output is correct |
40 |
Correct |
59 ms |
61036 KB |
Output is correct |
41 |
Correct |
64 ms |
62060 KB |
Output is correct |
42 |
Correct |
56 ms |
60908 KB |
Output is correct |
43 |
Correct |
56 ms |
61900 KB |
Output is correct |
44 |
Correct |
57 ms |
61804 KB |
Output is correct |
45 |
Correct |
109 ms |
74980 KB |
Output is correct |
46 |
Correct |
82 ms |
68716 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
41 ms |
60140 KB |
Output is correct |
2 |
Correct |
42 ms |
60140 KB |
Output is correct |
3 |
Correct |
43 ms |
60268 KB |
Output is correct |
4 |
Correct |
38 ms |
60140 KB |
Output is correct |
5 |
Correct |
39 ms |
60140 KB |
Output is correct |
6 |
Correct |
40 ms |
60140 KB |
Output is correct |
7 |
Correct |
39 ms |
60140 KB |
Output is correct |
8 |
Correct |
39 ms |
60140 KB |
Output is correct |
9 |
Correct |
44 ms |
60140 KB |
Output is correct |
10 |
Correct |
45 ms |
60140 KB |
Output is correct |
11 |
Correct |
39 ms |
60288 KB |
Output is correct |
12 |
Correct |
39 ms |
60396 KB |
Output is correct |
13 |
Correct |
38 ms |
60268 KB |
Output is correct |
14 |
Correct |
39 ms |
60396 KB |
Output is correct |
15 |
Correct |
38 ms |
60340 KB |
Output is correct |
16 |
Correct |
38 ms |
60268 KB |
Output is correct |
17 |
Correct |
39 ms |
60396 KB |
Output is correct |
18 |
Correct |
39 ms |
60268 KB |
Output is correct |
19 |
Correct |
38 ms |
60268 KB |
Output is correct |
20 |
Correct |
40 ms |
60396 KB |
Output is correct |
21 |
Correct |
43 ms |
60268 KB |
Output is correct |
22 |
Correct |
38 ms |
60268 KB |
Output is correct |
23 |
Correct |
39 ms |
60396 KB |
Output is correct |
24 |
Correct |
39 ms |
60396 KB |
Output is correct |
25 |
Correct |
39 ms |
60268 KB |
Output is correct |
26 |
Correct |
38 ms |
60396 KB |
Output is correct |
27 |
Correct |
39 ms |
60396 KB |
Output is correct |
28 |
Correct |
41 ms |
60908 KB |
Output is correct |
29 |
Correct |
43 ms |
62060 KB |
Output is correct |
30 |
Correct |
39 ms |
60812 KB |
Output is correct |
31 |
Correct |
40 ms |
61164 KB |
Output is correct |
32 |
Correct |
39 ms |
60908 KB |
Output is correct |
33 |
Correct |
56 ms |
63980 KB |
Output is correct |
34 |
Correct |
44 ms |
62316 KB |
Output is correct |
35 |
Correct |
56 ms |
61676 KB |
Output is correct |
36 |
Correct |
40 ms |
60268 KB |
Output is correct |
37 |
Correct |
52 ms |
61676 KB |
Output is correct |
38 |
Correct |
56 ms |
61352 KB |
Output is correct |
39 |
Correct |
55 ms |
60952 KB |
Output is correct |
40 |
Correct |
54 ms |
61036 KB |
Output is correct |
41 |
Correct |
60 ms |
62060 KB |
Output is correct |
42 |
Correct |
51 ms |
60908 KB |
Output is correct |
43 |
Correct |
53 ms |
61804 KB |
Output is correct |
44 |
Correct |
52 ms |
61804 KB |
Output is correct |
45 |
Correct |
105 ms |
74988 KB |
Output is correct |
46 |
Correct |
81 ms |
68716 KB |
Output is correct |
47 |
Correct |
54 ms |
61420 KB |
Output is correct |
48 |
Correct |
52 ms |
61164 KB |
Output is correct |
49 |
Correct |
51 ms |
61164 KB |
Output is correct |
50 |
Correct |
47 ms |
60908 KB |
Output is correct |
51 |
Correct |
67 ms |
62572 KB |
Output is correct |
52 |
Correct |
71 ms |
62700 KB |
Output is correct |
53 |
Correct |
59 ms |
61548 KB |
Output is correct |
54 |
Correct |
38 ms |
60780 KB |
Output is correct |
55 |
Correct |
39 ms |
61036 KB |
Output is correct |
56 |
Correct |
61 ms |
63596 KB |
Output is correct |
57 |
Correct |
38 ms |
60396 KB |
Output is correct |
58 |
Correct |
57 ms |
62956 KB |
Output is correct |
59 |
Correct |
59 ms |
63212 KB |
Output is correct |
60 |
Correct |
57 ms |
63212 KB |
Output is correct |
61 |
Correct |
59 ms |
63468 KB |
Output is correct |
62 |
Correct |
112 ms |
74860 KB |
Output is correct |
63 |
Correct |
591 ms |
131436 KB |
Output is correct |
64 |
Correct |
497 ms |
147480 KB |
Output is correct |
65 |
Correct |
606 ms |
186092 KB |
Output is correct |
66 |
Correct |
823 ms |
248940 KB |
Output is correct |
67 |
Correct |
478 ms |
176492 KB |
Output is correct |