#include <bits/stdc++.h>
using namespace std;
const int INF = 0x3f3f3f3f;
typedef pair<int, int> pi;
#define to first
#define cost second
#define pos first
#define range second
struct Q {
int pos, cost;
};
bool operator<(const Q& a, const Q& b) {
return a.cost > b.cost;
}
set<pi> V[30001];
set<int> vitP[30001];
int dst[30001];
int main() {
ios::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
memset(dst, INF, sizeof(dst));
int n, m; cin >> n >> m;
vector<pi> doge(m);
vector<int> posdoge(n + 1, -1);
int s = 0, e = 0;
for (int i = 0; i < m; i++) {
cin >> doge[i].pos >> doge[i].range;
if (i == 0) s = doge[i].pos;
if (i == 1) e = doge[i].pos;
vitP[doge[i].pos].insert(doge[i].range);
}
for (int i = 0; i < m; i++) {
pi& now = doge[i];
for (int j = now.pos + now.range; j < n; j += now.range) {
if (vitP[j].size() == 0) continue;
int dst = j - now.pos;
V[now.pos].insert({ j, dst / now.range });
if (vitP[j].find(now.range) != vitP[j].end()) break;
}
for (int j = now.pos - now.range; j >= 0; j -= now.range) {
if (vitP[j].size() == 0) continue;
int dst = now.pos - j;
V[now.pos].insert({ j, dst / now.range });
if (vitP[j].find(now.range) != vitP[j].end()) break;
}
}
priority_queue<Q> pq;
pq.push({ s, 0 });
while (!pq.empty()) {
Q top = pq.top(); pq.pop();
if (top.pos == e) {
cout << top.cost;
return 0;
}
for (pi w : V[top.pos]) {
if (dst[w.to] > top.cost + w.cost) {
dst[w.to] = top.cost + w.cost;
pq.push({ w.to, dst[w.to] });
}
}
}
cout << -1;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3308 KB |
Output is correct |
2 |
Correct |
2 ms |
3308 KB |
Output is correct |
3 |
Correct |
2 ms |
3308 KB |
Output is correct |
4 |
Correct |
2 ms |
3308 KB |
Output is correct |
5 |
Correct |
2 ms |
3308 KB |
Output is correct |
6 |
Correct |
2 ms |
3308 KB |
Output is correct |
7 |
Correct |
2 ms |
3308 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3328 KB |
Output is correct |
2 |
Correct |
2 ms |
3308 KB |
Output is correct |
3 |
Correct |
2 ms |
3308 KB |
Output is correct |
4 |
Correct |
2 ms |
3308 KB |
Output is correct |
5 |
Correct |
2 ms |
3308 KB |
Output is correct |
6 |
Correct |
2 ms |
3308 KB |
Output is correct |
7 |
Correct |
2 ms |
3308 KB |
Output is correct |
8 |
Correct |
2 ms |
3308 KB |
Output is correct |
9 |
Correct |
2 ms |
3308 KB |
Output is correct |
10 |
Correct |
2 ms |
3308 KB |
Output is correct |
11 |
Correct |
4 ms |
3564 KB |
Output is correct |
12 |
Correct |
3 ms |
3308 KB |
Output is correct |
13 |
Correct |
3 ms |
3308 KB |
Output is correct |
14 |
Correct |
3 ms |
3436 KB |
Output is correct |
15 |
Correct |
4 ms |
3436 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3308 KB |
Output is correct |
2 |
Correct |
2 ms |
3308 KB |
Output is correct |
3 |
Correct |
2 ms |
3308 KB |
Output is correct |
4 |
Correct |
2 ms |
3308 KB |
Output is correct |
5 |
Correct |
2 ms |
3308 KB |
Output is correct |
6 |
Correct |
2 ms |
3308 KB |
Output is correct |
7 |
Correct |
2 ms |
3308 KB |
Output is correct |
8 |
Correct |
2 ms |
3308 KB |
Output is correct |
9 |
Correct |
2 ms |
3308 KB |
Output is correct |
10 |
Correct |
3 ms |
3308 KB |
Output is correct |
11 |
Correct |
5 ms |
3564 KB |
Output is correct |
12 |
Correct |
3 ms |
3308 KB |
Output is correct |
13 |
Correct |
2 ms |
3308 KB |
Output is correct |
14 |
Correct |
4 ms |
3436 KB |
Output is correct |
15 |
Correct |
3 ms |
3436 KB |
Output is correct |
16 |
Correct |
3 ms |
3456 KB |
Output is correct |
17 |
Correct |
5 ms |
4076 KB |
Output is correct |
18 |
Correct |
3 ms |
3436 KB |
Output is correct |
19 |
Correct |
3 ms |
3308 KB |
Output is correct |
20 |
Correct |
3 ms |
3564 KB |
Output is correct |
21 |
Correct |
3 ms |
3436 KB |
Output is correct |
22 |
Correct |
3 ms |
3436 KB |
Output is correct |
23 |
Correct |
3 ms |
3436 KB |
Output is correct |
24 |
Correct |
4 ms |
3692 KB |
Output is correct |
25 |
Correct |
4 ms |
3564 KB |
Output is correct |
26 |
Correct |
12 ms |
3308 KB |
Output is correct |
27 |
Correct |
10 ms |
3308 KB |
Output is correct |
28 |
Correct |
6 ms |
4332 KB |
Output is correct |
29 |
Correct |
3 ms |
3308 KB |
Output is correct |
30 |
Correct |
2 ms |
3308 KB |
Output is correct |
31 |
Correct |
3 ms |
3308 KB |
Output is correct |
32 |
Correct |
2 ms |
3308 KB |
Output is correct |
33 |
Correct |
3 ms |
3436 KB |
Output is correct |
34 |
Correct |
4 ms |
3436 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3308 KB |
Output is correct |
2 |
Correct |
2 ms |
3308 KB |
Output is correct |
3 |
Correct |
2 ms |
3308 KB |
Output is correct |
4 |
Correct |
2 ms |
3308 KB |
Output is correct |
5 |
Correct |
2 ms |
3308 KB |
Output is correct |
6 |
Correct |
2 ms |
3308 KB |
Output is correct |
7 |
Correct |
2 ms |
3308 KB |
Output is correct |
8 |
Correct |
3 ms |
3308 KB |
Output is correct |
9 |
Correct |
2 ms |
3308 KB |
Output is correct |
10 |
Correct |
3 ms |
3308 KB |
Output is correct |
11 |
Correct |
4 ms |
3564 KB |
Output is correct |
12 |
Correct |
3 ms |
3308 KB |
Output is correct |
13 |
Correct |
3 ms |
3308 KB |
Output is correct |
14 |
Correct |
3 ms |
3436 KB |
Output is correct |
15 |
Correct |
3 ms |
3436 KB |
Output is correct |
16 |
Correct |
3 ms |
3436 KB |
Output is correct |
17 |
Correct |
5 ms |
4076 KB |
Output is correct |
18 |
Correct |
3 ms |
3436 KB |
Output is correct |
19 |
Correct |
2 ms |
3308 KB |
Output is correct |
20 |
Correct |
3 ms |
3584 KB |
Output is correct |
21 |
Correct |
3 ms |
3436 KB |
Output is correct |
22 |
Correct |
3 ms |
3436 KB |
Output is correct |
23 |
Correct |
4 ms |
3436 KB |
Output is correct |
24 |
Correct |
5 ms |
3692 KB |
Output is correct |
25 |
Correct |
4 ms |
3564 KB |
Output is correct |
26 |
Correct |
12 ms |
3308 KB |
Output is correct |
27 |
Correct |
10 ms |
3308 KB |
Output is correct |
28 |
Correct |
6 ms |
4332 KB |
Output is correct |
29 |
Correct |
3 ms |
3308 KB |
Output is correct |
30 |
Correct |
2 ms |
3308 KB |
Output is correct |
31 |
Correct |
3 ms |
3308 KB |
Output is correct |
32 |
Correct |
2 ms |
3308 KB |
Output is correct |
33 |
Correct |
5 ms |
3436 KB |
Output is correct |
34 |
Correct |
4 ms |
3456 KB |
Output is correct |
35 |
Correct |
34 ms |
8812 KB |
Output is correct |
36 |
Correct |
6 ms |
4204 KB |
Output is correct |
37 |
Correct |
57 ms |
12652 KB |
Output is correct |
38 |
Correct |
60 ms |
11904 KB |
Output is correct |
39 |
Correct |
60 ms |
12012 KB |
Output is correct |
40 |
Correct |
56 ms |
12012 KB |
Output is correct |
41 |
Correct |
56 ms |
12012 KB |
Output is correct |
42 |
Correct |
157 ms |
3692 KB |
Output is correct |
43 |
Correct |
130 ms |
3692 KB |
Output is correct |
44 |
Correct |
11 ms |
3948 KB |
Output is correct |
45 |
Correct |
26 ms |
6508 KB |
Output is correct |
46 |
Correct |
26 ms |
6508 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
3308 KB |
Output is correct |
2 |
Correct |
3 ms |
3308 KB |
Output is correct |
3 |
Correct |
3 ms |
3308 KB |
Output is correct |
4 |
Correct |
2 ms |
3308 KB |
Output is correct |
5 |
Correct |
2 ms |
3308 KB |
Output is correct |
6 |
Correct |
2 ms |
3308 KB |
Output is correct |
7 |
Correct |
2 ms |
3308 KB |
Output is correct |
8 |
Correct |
3 ms |
3308 KB |
Output is correct |
9 |
Correct |
2 ms |
3308 KB |
Output is correct |
10 |
Correct |
3 ms |
3436 KB |
Output is correct |
11 |
Correct |
4 ms |
3564 KB |
Output is correct |
12 |
Correct |
3 ms |
3308 KB |
Output is correct |
13 |
Correct |
3 ms |
3308 KB |
Output is correct |
14 |
Correct |
4 ms |
3436 KB |
Output is correct |
15 |
Correct |
4 ms |
3436 KB |
Output is correct |
16 |
Correct |
3 ms |
3436 KB |
Output is correct |
17 |
Correct |
5 ms |
4076 KB |
Output is correct |
18 |
Correct |
3 ms |
3436 KB |
Output is correct |
19 |
Correct |
3 ms |
3308 KB |
Output is correct |
20 |
Correct |
3 ms |
3564 KB |
Output is correct |
21 |
Correct |
3 ms |
3436 KB |
Output is correct |
22 |
Correct |
3 ms |
3436 KB |
Output is correct |
23 |
Correct |
3 ms |
3436 KB |
Output is correct |
24 |
Correct |
5 ms |
3820 KB |
Output is correct |
25 |
Correct |
4 ms |
3692 KB |
Output is correct |
26 |
Correct |
12 ms |
3308 KB |
Output is correct |
27 |
Correct |
10 ms |
3308 KB |
Output is correct |
28 |
Correct |
6 ms |
4332 KB |
Output is correct |
29 |
Correct |
3 ms |
3308 KB |
Output is correct |
30 |
Correct |
3 ms |
3308 KB |
Output is correct |
31 |
Correct |
3 ms |
3308 KB |
Output is correct |
32 |
Correct |
3 ms |
3308 KB |
Output is correct |
33 |
Correct |
4 ms |
3436 KB |
Output is correct |
34 |
Correct |
4 ms |
3436 KB |
Output is correct |
35 |
Correct |
35 ms |
8940 KB |
Output is correct |
36 |
Correct |
7 ms |
4204 KB |
Output is correct |
37 |
Correct |
57 ms |
12652 KB |
Output is correct |
38 |
Correct |
62 ms |
12012 KB |
Output is correct |
39 |
Correct |
59 ms |
12044 KB |
Output is correct |
40 |
Correct |
56 ms |
12012 KB |
Output is correct |
41 |
Correct |
55 ms |
12012 KB |
Output is correct |
42 |
Correct |
162 ms |
3692 KB |
Output is correct |
43 |
Correct |
129 ms |
3692 KB |
Output is correct |
44 |
Correct |
8 ms |
3948 KB |
Output is correct |
45 |
Correct |
27 ms |
6508 KB |
Output is correct |
46 |
Correct |
27 ms |
6508 KB |
Output is correct |
47 |
Correct |
150 ms |
36332 KB |
Output is correct |
48 |
Correct |
35 ms |
11116 KB |
Output is correct |
49 |
Correct |
23 ms |
8044 KB |
Output is correct |
50 |
Correct |
17 ms |
6892 KB |
Output is correct |
51 |
Correct |
58 ms |
14960 KB |
Output is correct |
52 |
Correct |
67 ms |
16360 KB |
Output is correct |
53 |
Correct |
26 ms |
8300 KB |
Output is correct |
54 |
Correct |
3 ms |
3436 KB |
Output is correct |
55 |
Correct |
3 ms |
3436 KB |
Output is correct |
56 |
Correct |
25 ms |
8044 KB |
Output is correct |
57 |
Correct |
14 ms |
6124 KB |
Output is correct |
58 |
Execution timed out |
1085 ms |
3820 KB |
Time limit exceeded |
59 |
Halted |
0 ms |
0 KB |
- |