#include <bits/stdc++.h>
using namespace std ;
#define endl '\n'
#define all(a) a.begin() , a.end()
#define alr(a) a.rbegin() , a.rend()
const int N = 2004 * 2004;
vector < int > dis(N, 1e9);
vector < vector < pair < int , int >>> adj(N);
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0);cout.tie(0);
int n, m;
cin >> n >> m;
pair < int , int > first, second;
vector < vector < int >> arr(1 + n);
for(int i = 0 ; i < m ; i++) {
int a, b;
cin >> a >> b;
if(i == 0) {
first = {a, b};
} else if(i == 1) {
second = {a, b};
}
arr[a].push_back(b);
}
for(int i = 0 ; i < n ; i++) {
for(auto j : arr[i]) {
int node = (i * (n + 1) + j);
adj[i * (n + 1) + n + 1].push_back({node, 0});
adj[node].push_back({i * (n + 1) + n + 1, 0});
for(int k = 1 ; k <= n ; k++) {
if(i + j * k < n) {
adj[node].push_back({(i + j * k) * (n + 1) + n + 1, k});
}
if(i - j * k >= 0) {
adj[node].push_back({(i - j * k) * (n + 1) + n + 1, k});
}
}
}
}
int st = first.first * (n + 1) + first.second;
priority_queue < pair < int , int >> pq;
pq.push({0, st});
dis[st] = 0;
while(pq.size()) {
auto top = pq.top();
pq.pop();
top.first *= -1;
if(top.first != dis[top.second])
continue;
for(auto ch : adj[top.second]) {
if(dis[ch.first] > top.first + ch.second) {
dis[ch.first] = top.first + ch.second;
pq.push({-dis[ch.first], ch.first});
}
}
}
int ed = second.first * (n + 1) + second.second;
if(dis[ed] >= 1e8) dis[ed] = -1;
cout << dis[ed] << endl;
return 0 ;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
57 ms |
110476 KB |
Output is correct |
2 |
Correct |
26 ms |
110492 KB |
Output is correct |
3 |
Correct |
28 ms |
110468 KB |
Output is correct |
4 |
Correct |
27 ms |
110428 KB |
Output is correct |
5 |
Correct |
27 ms |
110428 KB |
Output is correct |
6 |
Correct |
27 ms |
110428 KB |
Output is correct |
7 |
Correct |
28 ms |
110464 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
27 ms |
110580 KB |
Output is correct |
2 |
Correct |
28 ms |
110580 KB |
Output is correct |
3 |
Correct |
26 ms |
110424 KB |
Output is correct |
4 |
Correct |
27 ms |
110428 KB |
Output is correct |
5 |
Correct |
27 ms |
110224 KB |
Output is correct |
6 |
Correct |
26 ms |
110428 KB |
Output is correct |
7 |
Correct |
26 ms |
110424 KB |
Output is correct |
8 |
Correct |
27 ms |
110424 KB |
Output is correct |
9 |
Correct |
26 ms |
110332 KB |
Output is correct |
10 |
Correct |
26 ms |
110428 KB |
Output is correct |
11 |
Correct |
27 ms |
110640 KB |
Output is correct |
12 |
Correct |
44 ms |
112592 KB |
Output is correct |
13 |
Correct |
29 ms |
112596 KB |
Output is correct |
14 |
Correct |
28 ms |
110428 KB |
Output is correct |
15 |
Correct |
27 ms |
110520 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
30 ms |
110428 KB |
Output is correct |
2 |
Correct |
26 ms |
110256 KB |
Output is correct |
3 |
Correct |
26 ms |
110428 KB |
Output is correct |
4 |
Correct |
28 ms |
110428 KB |
Output is correct |
5 |
Correct |
28 ms |
110428 KB |
Output is correct |
6 |
Correct |
26 ms |
110424 KB |
Output is correct |
7 |
Correct |
26 ms |
110424 KB |
Output is correct |
8 |
Correct |
26 ms |
110428 KB |
Output is correct |
9 |
Correct |
26 ms |
110428 KB |
Output is correct |
10 |
Correct |
27 ms |
110428 KB |
Output is correct |
11 |
Correct |
27 ms |
110428 KB |
Output is correct |
12 |
Correct |
32 ms |
112600 KB |
Output is correct |
13 |
Correct |
28 ms |
112600 KB |
Output is correct |
14 |
Correct |
27 ms |
110428 KB |
Output is correct |
15 |
Correct |
27 ms |
110420 KB |
Output is correct |
16 |
Correct |
26 ms |
110428 KB |
Output is correct |
17 |
Correct |
29 ms |
110684 KB |
Output is correct |
18 |
Correct |
28 ms |
110660 KB |
Output is correct |
19 |
Correct |
26 ms |
110428 KB |
Output is correct |
20 |
Correct |
89 ms |
142676 KB |
Output is correct |
21 |
Correct |
27 ms |
110476 KB |
Output is correct |
22 |
Correct |
27 ms |
110656 KB |
Output is correct |
23 |
Correct |
28 ms |
110700 KB |
Output is correct |
24 |
Correct |
30 ms |
110676 KB |
Output is correct |
25 |
Correct |
32 ms |
110680 KB |
Output is correct |
26 |
Correct |
80 ms |
144560 KB |
Output is correct |
27 |
Correct |
68 ms |
144412 KB |
Output is correct |
28 |
Correct |
31 ms |
110936 KB |
Output is correct |
29 |
Correct |
29 ms |
111192 KB |
Output is correct |
30 |
Correct |
27 ms |
110676 KB |
Output is correct |
31 |
Correct |
29 ms |
111012 KB |
Output is correct |
32 |
Correct |
29 ms |
110724 KB |
Output is correct |
33 |
Correct |
34 ms |
111964 KB |
Output is correct |
34 |
Correct |
33 ms |
112212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
25 ms |
110428 KB |
Output is correct |
2 |
Correct |
25 ms |
110392 KB |
Output is correct |
3 |
Correct |
26 ms |
110428 KB |
Output is correct |
4 |
Correct |
28 ms |
110412 KB |
Output is correct |
5 |
Correct |
26 ms |
110416 KB |
Output is correct |
6 |
Correct |
26 ms |
110500 KB |
Output is correct |
7 |
Correct |
25 ms |
110424 KB |
Output is correct |
8 |
Correct |
26 ms |
110424 KB |
Output is correct |
9 |
Correct |
26 ms |
110276 KB |
Output is correct |
10 |
Correct |
26 ms |
110500 KB |
Output is correct |
11 |
Correct |
27 ms |
110424 KB |
Output is correct |
12 |
Correct |
30 ms |
112600 KB |
Output is correct |
13 |
Correct |
29 ms |
112596 KB |
Output is correct |
14 |
Correct |
27 ms |
110604 KB |
Output is correct |
15 |
Correct |
29 ms |
110548 KB |
Output is correct |
16 |
Correct |
29 ms |
110428 KB |
Output is correct |
17 |
Correct |
29 ms |
110680 KB |
Output is correct |
18 |
Correct |
27 ms |
110612 KB |
Output is correct |
19 |
Correct |
27 ms |
110428 KB |
Output is correct |
20 |
Correct |
79 ms |
142672 KB |
Output is correct |
21 |
Correct |
26 ms |
110560 KB |
Output is correct |
22 |
Correct |
27 ms |
110428 KB |
Output is correct |
23 |
Correct |
31 ms |
110856 KB |
Output is correct |
24 |
Correct |
30 ms |
110676 KB |
Output is correct |
25 |
Correct |
32 ms |
110676 KB |
Output is correct |
26 |
Correct |
68 ms |
144312 KB |
Output is correct |
27 |
Correct |
67 ms |
144308 KB |
Output is correct |
28 |
Correct |
31 ms |
110940 KB |
Output is correct |
29 |
Correct |
33 ms |
111124 KB |
Output is correct |
30 |
Correct |
29 ms |
110744 KB |
Output is correct |
31 |
Correct |
28 ms |
110932 KB |
Output is correct |
32 |
Correct |
29 ms |
110920 KB |
Output is correct |
33 |
Correct |
33 ms |
111952 KB |
Output is correct |
34 |
Correct |
33 ms |
112100 KB |
Output is correct |
35 |
Correct |
75 ms |
113236 KB |
Output is correct |
36 |
Correct |
33 ms |
110940 KB |
Output is correct |
37 |
Correct |
79 ms |
114336 KB |
Output is correct |
38 |
Correct |
113 ms |
114208 KB |
Output is correct |
39 |
Correct |
104 ms |
114512 KB |
Output is correct |
40 |
Correct |
104 ms |
114292 KB |
Output is correct |
41 |
Correct |
108 ms |
114204 KB |
Output is correct |
42 |
Runtime error |
239 ms |
262144 KB |
Execution killed with signal 9 |
43 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
26 ms |
110424 KB |
Output is correct |
2 |
Correct |
28 ms |
110320 KB |
Output is correct |
3 |
Correct |
31 ms |
110492 KB |
Output is correct |
4 |
Correct |
26 ms |
110680 KB |
Output is correct |
5 |
Correct |
27 ms |
110424 KB |
Output is correct |
6 |
Correct |
26 ms |
110424 KB |
Output is correct |
7 |
Correct |
26 ms |
110668 KB |
Output is correct |
8 |
Correct |
28 ms |
110424 KB |
Output is correct |
9 |
Correct |
27 ms |
110428 KB |
Output is correct |
10 |
Correct |
27 ms |
110428 KB |
Output is correct |
11 |
Correct |
26 ms |
110416 KB |
Output is correct |
12 |
Correct |
30 ms |
112488 KB |
Output is correct |
13 |
Correct |
30 ms |
112600 KB |
Output is correct |
14 |
Correct |
31 ms |
110612 KB |
Output is correct |
15 |
Correct |
31 ms |
110452 KB |
Output is correct |
16 |
Correct |
31 ms |
110424 KB |
Output is correct |
17 |
Correct |
29 ms |
110680 KB |
Output is correct |
18 |
Correct |
27 ms |
110672 KB |
Output is correct |
19 |
Correct |
27 ms |
110428 KB |
Output is correct |
20 |
Correct |
78 ms |
142620 KB |
Output is correct |
21 |
Correct |
30 ms |
110440 KB |
Output is correct |
22 |
Correct |
27 ms |
110500 KB |
Output is correct |
23 |
Correct |
33 ms |
110428 KB |
Output is correct |
24 |
Correct |
33 ms |
110828 KB |
Output is correct |
25 |
Correct |
32 ms |
110680 KB |
Output is correct |
26 |
Correct |
69 ms |
145592 KB |
Output is correct |
27 |
Correct |
68 ms |
143800 KB |
Output is correct |
28 |
Correct |
34 ms |
110940 KB |
Output is correct |
29 |
Correct |
30 ms |
111196 KB |
Output is correct |
30 |
Correct |
28 ms |
110696 KB |
Output is correct |
31 |
Correct |
34 ms |
110940 KB |
Output is correct |
32 |
Correct |
28 ms |
110852 KB |
Output is correct |
33 |
Correct |
33 ms |
111952 KB |
Output is correct |
34 |
Correct |
33 ms |
111956 KB |
Output is correct |
35 |
Correct |
81 ms |
113288 KB |
Output is correct |
36 |
Correct |
35 ms |
110932 KB |
Output is correct |
37 |
Correct |
87 ms |
114352 KB |
Output is correct |
38 |
Correct |
107 ms |
114344 KB |
Output is correct |
39 |
Correct |
103 ms |
114516 KB |
Output is correct |
40 |
Correct |
104 ms |
114328 KB |
Output is correct |
41 |
Correct |
104 ms |
114272 KB |
Output is correct |
42 |
Runtime error |
208 ms |
262144 KB |
Execution killed with signal 9 |
43 |
Halted |
0 ms |
0 KB |
- |