#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 30000;
vector<pair<int, int>> adj[N];
int b[N], p[N];
set<int> inv[N];
int n, m;
void solveTestCase() {
cin >> n >> m;
for (int i = 0; i < m; i++) {
cin >> b[i] >> p[i];
inv[b[i]].insert(p[i]);
}
for (int i = 0; i < m; i++) {
for (int j = b[i] - p[i], k = 1; j >= 0; j -= p[i], k++) {
adj[b[i]].emplace_back(j, k);
if (inv[j].count(p[i]))
break;
}
for (int j = b[i] + p[i], k = 1; j < n; j += p[i], k++) {
adj[b[i]].emplace_back(j, k);
if (inv[j].count(p[i]))
break;
}
}
int dist[n];
fill(dist, dist + n, 1e18);
dist[b[0]] = 0;
priority_queue<pair<int, int>, vector<pair<int, int>>, decltype(greater<>())> pq;
pq.push({0, b[0]});
set<int> done;
while (!pq.empty()) {
auto temp = pq.top();
pq.pop();
if (done.count(temp.second))
break;
done.insert(temp.second);
for (auto i : adj[temp.second]) {
if (dist[i.first] > temp.first + i.second) {
dist[i.first] = temp.first + i.second;
pq.push({dist[i.first], i.first});
}
}
}
cout << (dist[b[1]] == 1e18 ? -1 : dist[b[1]]);
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int test = 1;
// cin >> test;
while (test--)
solveTestCase();
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
2432 KB |
Output is correct |
2 |
Correct |
6 ms |
2432 KB |
Output is correct |
3 |
Correct |
6 ms |
2432 KB |
Output is correct |
4 |
Correct |
6 ms |
2432 KB |
Output is correct |
5 |
Correct |
6 ms |
2560 KB |
Output is correct |
6 |
Correct |
6 ms |
2432 KB |
Output is correct |
7 |
Correct |
6 ms |
2432 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2432 KB |
Output is correct |
2 |
Correct |
6 ms |
2432 KB |
Output is correct |
3 |
Correct |
6 ms |
2432 KB |
Output is correct |
4 |
Correct |
6 ms |
2432 KB |
Output is correct |
5 |
Correct |
6 ms |
2432 KB |
Output is correct |
6 |
Correct |
6 ms |
2432 KB |
Output is correct |
7 |
Correct |
6 ms |
2432 KB |
Output is correct |
8 |
Correct |
6 ms |
2432 KB |
Output is correct |
9 |
Correct |
6 ms |
2432 KB |
Output is correct |
10 |
Correct |
6 ms |
2560 KB |
Output is correct |
11 |
Correct |
7 ms |
2644 KB |
Output is correct |
12 |
Correct |
10 ms |
6776 KB |
Output is correct |
13 |
Correct |
6 ms |
2688 KB |
Output is correct |
14 |
Correct |
6 ms |
2688 KB |
Output is correct |
15 |
Correct |
6 ms |
2688 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2432 KB |
Output is correct |
2 |
Correct |
6 ms |
2560 KB |
Output is correct |
3 |
Correct |
6 ms |
2432 KB |
Output is correct |
4 |
Correct |
6 ms |
2432 KB |
Output is correct |
5 |
Correct |
6 ms |
2432 KB |
Output is correct |
6 |
Correct |
7 ms |
2560 KB |
Output is correct |
7 |
Correct |
6 ms |
2432 KB |
Output is correct |
8 |
Correct |
6 ms |
2560 KB |
Output is correct |
9 |
Correct |
6 ms |
2432 KB |
Output is correct |
10 |
Correct |
6 ms |
2560 KB |
Output is correct |
11 |
Correct |
7 ms |
2688 KB |
Output is correct |
12 |
Correct |
11 ms |
6776 KB |
Output is correct |
13 |
Correct |
6 ms |
2688 KB |
Output is correct |
14 |
Correct |
7 ms |
2688 KB |
Output is correct |
15 |
Correct |
7 ms |
2688 KB |
Output is correct |
16 |
Correct |
6 ms |
2560 KB |
Output is correct |
17 |
Correct |
7 ms |
2944 KB |
Output is correct |
18 |
Correct |
7 ms |
2688 KB |
Output is correct |
19 |
Correct |
6 ms |
2560 KB |
Output is correct |
20 |
Correct |
7 ms |
2816 KB |
Output is correct |
21 |
Correct |
7 ms |
2688 KB |
Output is correct |
22 |
Correct |
6 ms |
2688 KB |
Output is correct |
23 |
Incorrect |
7 ms |
2688 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2432 KB |
Output is correct |
2 |
Correct |
6 ms |
2432 KB |
Output is correct |
3 |
Correct |
6 ms |
2432 KB |
Output is correct |
4 |
Correct |
6 ms |
2432 KB |
Output is correct |
5 |
Correct |
6 ms |
2432 KB |
Output is correct |
6 |
Correct |
6 ms |
2432 KB |
Output is correct |
7 |
Correct |
7 ms |
2432 KB |
Output is correct |
8 |
Correct |
6 ms |
2432 KB |
Output is correct |
9 |
Correct |
6 ms |
2432 KB |
Output is correct |
10 |
Correct |
6 ms |
2560 KB |
Output is correct |
11 |
Correct |
7 ms |
2688 KB |
Output is correct |
12 |
Correct |
11 ms |
6776 KB |
Output is correct |
13 |
Correct |
6 ms |
2688 KB |
Output is correct |
14 |
Correct |
6 ms |
2688 KB |
Output is correct |
15 |
Correct |
6 ms |
2688 KB |
Output is correct |
16 |
Correct |
7 ms |
2560 KB |
Output is correct |
17 |
Correct |
7 ms |
2944 KB |
Output is correct |
18 |
Correct |
6 ms |
2688 KB |
Output is correct |
19 |
Correct |
6 ms |
2688 KB |
Output is correct |
20 |
Correct |
6 ms |
2816 KB |
Output is correct |
21 |
Correct |
6 ms |
2560 KB |
Output is correct |
22 |
Correct |
6 ms |
2560 KB |
Output is correct |
23 |
Incorrect |
6 ms |
2688 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
2432 KB |
Output is correct |
2 |
Correct |
6 ms |
2432 KB |
Output is correct |
3 |
Correct |
6 ms |
2432 KB |
Output is correct |
4 |
Correct |
6 ms |
2432 KB |
Output is correct |
5 |
Correct |
6 ms |
2432 KB |
Output is correct |
6 |
Correct |
6 ms |
2408 KB |
Output is correct |
7 |
Correct |
6 ms |
2432 KB |
Output is correct |
8 |
Correct |
6 ms |
2432 KB |
Output is correct |
9 |
Correct |
6 ms |
2432 KB |
Output is correct |
10 |
Correct |
6 ms |
2560 KB |
Output is correct |
11 |
Correct |
7 ms |
2740 KB |
Output is correct |
12 |
Correct |
10 ms |
6776 KB |
Output is correct |
13 |
Correct |
6 ms |
2688 KB |
Output is correct |
14 |
Correct |
6 ms |
2688 KB |
Output is correct |
15 |
Correct |
7 ms |
2688 KB |
Output is correct |
16 |
Correct |
6 ms |
2560 KB |
Output is correct |
17 |
Correct |
8 ms |
3072 KB |
Output is correct |
18 |
Correct |
6 ms |
2688 KB |
Output is correct |
19 |
Correct |
6 ms |
2560 KB |
Output is correct |
20 |
Correct |
8 ms |
2816 KB |
Output is correct |
21 |
Correct |
6 ms |
2560 KB |
Output is correct |
22 |
Correct |
6 ms |
2688 KB |
Output is correct |
23 |
Incorrect |
6 ms |
2688 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |