#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll INF = 1e18;
int n, m, s[30030], p[30030];
ll d[30030];
vector<array<int, 2>> v[30030];
set<int> st[30030], did[30030];
priority_queue<array<int, 2>> pq;
int main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> m;
for(int i=0;i<m;i++) {
cin >> s[i] >> p[i];
st[s[i]].insert(p[i]);
}
for(int i=0;i<m;i++) {
if(did[s[i]].count(p[i])) continue;
did[s[i]].insert(p[i]);
for(int j=1;;j++) {
int x = s[i]-p[i]*j;
if(x < 0) break;
v[s[i]].push_back({x, j});
if(st[x].count(p[i])) break;
}
for(int j=1;;j++) {
int x = s[i]+p[i]*j;
if(x >= n) break;
v[s[i]].push_back({x, j});
if(st[x].count(p[i])) break;
}
}
fill(d, d+n, INF);
d[s[0]] = 0, pq.push({0, s[0]});
while(!pq.empty()) {
auto [c, u] = pq.top(); pq.pop();
if(-c > d[u]) continue;
for(auto [x, y] : v[u]) if(y-c < d[x]) d[x] = y-c, pq.push({c-y, x});
}
cout << (d[s[1]] == INF ? -1 : d[s[1]]);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 2 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 3 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 4 |
Correct |
1 ms |
3996 KB |
Output is correct |
| 5 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 6 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 7 |
Correct |
1 ms |
3932 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 2 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 3 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 4 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 6 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 7 |
Correct |
1 ms |
3988 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 9 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4184 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 13 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4188 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 2 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 3 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 4 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 6 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 7 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 8 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3936 KB |
Output is correct |
| 10 |
Correct |
2 ms |
4008 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 12 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 13 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4216 KB |
Output is correct |
| 15 |
Correct |
3 ms |
4176 KB |
Output is correct |
| 16 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 17 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 18 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 19 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 20 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3992 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 24 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 25 |
Correct |
3 ms |
4364 KB |
Output is correct |
| 26 |
Correct |
2 ms |
3952 KB |
Output is correct |
| 27 |
Correct |
3 ms |
4184 KB |
Output is correct |
| 28 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
3 ms |
4700 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 31 |
Correct |
3 ms |
4444 KB |
Output is correct |
| 32 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 33 |
Correct |
6 ms |
5468 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5468 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 2 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 3 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 4 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 6 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 7 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 10 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 13 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 16 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4188 KB |
Output is correct |
| 18 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 19 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 20 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 24 |
Correct |
3 ms |
4380 KB |
Output is correct |
| 25 |
Correct |
3 ms |
4188 KB |
Output is correct |
| 26 |
Correct |
2 ms |
3928 KB |
Output is correct |
| 27 |
Correct |
2 ms |
3932 KB |
Output is correct |
| 28 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
4 ms |
4732 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 31 |
Correct |
4 ms |
4444 KB |
Output is correct |
| 32 |
Correct |
3 ms |
4188 KB |
Output is correct |
| 33 |
Correct |
5 ms |
5548 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5468 KB |
Output is correct |
| 35 |
Correct |
16 ms |
7772 KB |
Output is correct |
| 36 |
Correct |
4 ms |
4696 KB |
Output is correct |
| 37 |
Correct |
18 ms |
8096 KB |
Output is correct |
| 38 |
Correct |
21 ms |
8856 KB |
Output is correct |
| 39 |
Correct |
21 ms |
9036 KB |
Output is correct |
| 40 |
Correct |
26 ms |
9044 KB |
Output is correct |
| 41 |
Correct |
21 ms |
9000 KB |
Output is correct |
| 42 |
Correct |
5 ms |
4444 KB |
Output is correct |
| 43 |
Correct |
6 ms |
4444 KB |
Output is correct |
| 44 |
Correct |
5 ms |
4440 KB |
Output is correct |
| 45 |
Correct |
23 ms |
11684 KB |
Output is correct |
| 46 |
Correct |
23 ms |
11612 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
4188 KB |
Output is correct |
| 2 |
Correct |
1 ms |
4128 KB |
Output is correct |
| 3 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 4 |
Correct |
1 ms |
3936 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 6 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 7 |
Correct |
1 ms |
3936 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3932 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3936 KB |
Output is correct |
| 10 |
Correct |
2 ms |
3936 KB |
Output is correct |
| 11 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 12 |
Correct |
2 ms |
3944 KB |
Output is correct |
| 13 |
Correct |
2 ms |
3936 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4188 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4200 KB |
Output is correct |
| 16 |
Correct |
2 ms |
3936 KB |
Output is correct |
| 17 |
Correct |
4 ms |
4192 KB |
Output is correct |
| 18 |
Correct |
2 ms |
4192 KB |
Output is correct |
| 19 |
Correct |
2 ms |
3940 KB |
Output is correct |
| 20 |
Correct |
2 ms |
4220 KB |
Output is correct |
| 21 |
Correct |
2 ms |
3944 KB |
Output is correct |
| 22 |
Correct |
2 ms |
3940 KB |
Output is correct |
| 23 |
Correct |
2 ms |
4192 KB |
Output is correct |
| 24 |
Correct |
2 ms |
4196 KB |
Output is correct |
| 25 |
Correct |
2 ms |
4192 KB |
Output is correct |
| 26 |
Correct |
2 ms |
4192 KB |
Output is correct |
| 27 |
Correct |
2 ms |
3944 KB |
Output is correct |
| 28 |
Correct |
2 ms |
4444 KB |
Output is correct |
| 29 |
Correct |
4 ms |
4704 KB |
Output is correct |
| 30 |
Correct |
2 ms |
4248 KB |
Output is correct |
| 31 |
Correct |
2 ms |
4456 KB |
Output is correct |
| 32 |
Correct |
2 ms |
4196 KB |
Output is correct |
| 33 |
Correct |
4 ms |
5476 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5476 KB |
Output is correct |
| 35 |
Correct |
17 ms |
7792 KB |
Output is correct |
| 36 |
Correct |
4 ms |
4708 KB |
Output is correct |
| 37 |
Correct |
23 ms |
8144 KB |
Output is correct |
| 38 |
Correct |
25 ms |
9040 KB |
Output is correct |
| 39 |
Correct |
21 ms |
9052 KB |
Output is correct |
| 40 |
Correct |
23 ms |
9040 KB |
Output is correct |
| 41 |
Correct |
25 ms |
8856 KB |
Output is correct |
| 42 |
Correct |
5 ms |
4532 KB |
Output is correct |
| 43 |
Correct |
5 ms |
4448 KB |
Output is correct |
| 44 |
Correct |
5 ms |
4708 KB |
Output is correct |
| 45 |
Correct |
24 ms |
11620 KB |
Output is correct |
| 46 |
Correct |
23 ms |
11624 KB |
Output is correct |
| 47 |
Correct |
39 ms |
15848 KB |
Output is correct |
| 48 |
Correct |
15 ms |
8932 KB |
Output is correct |
| 49 |
Correct |
16 ms |
8032 KB |
Output is correct |
| 50 |
Correct |
10 ms |
7268 KB |
Output is correct |
| 51 |
Correct |
35 ms |
11304 KB |
Output is correct |
| 52 |
Correct |
35 ms |
12408 KB |
Output is correct |
| 53 |
Correct |
17 ms |
8984 KB |
Output is correct |
| 54 |
Correct |
3 ms |
4700 KB |
Output is correct |
| 55 |
Correct |
4 ms |
5016 KB |
Output is correct |
| 56 |
Correct |
11 ms |
8284 KB |
Output is correct |
| 57 |
Correct |
30 ms |
13232 KB |
Output is correct |
| 58 |
Correct |
8 ms |
5528 KB |
Output is correct |
| 59 |
Correct |
8 ms |
5860 KB |
Output is correct |
| 60 |
Correct |
9 ms |
6668 KB |
Output is correct |
| 61 |
Correct |
10 ms |
6172 KB |
Output is correct |
| 62 |
Correct |
20 ms |
12504 KB |
Output is correct |
| 63 |
Correct |
66 ms |
32012 KB |
Output is correct |
| 64 |
Correct |
68 ms |
40956 KB |
Output is correct |
| 65 |
Correct |
87 ms |
52260 KB |
Output is correct |
| 66 |
Correct |
149 ms |
81592 KB |
Output is correct |
| 67 |
Correct |
135 ms |
80652 KB |
Output is correct |
