#include<bits/stdc++.h>
#define oo 100000000
#define maxn 30004
using namespace std;
typedef long long ll;
int n, m;
int b[maxn], p[maxn];
vector < pair < int, int > > g[maxn];
set < int > s[maxn];
int d[maxn];
int main(){
#define TASK "ABC"
// freopen(TASK".inp", "r", stdin); freopen(TASK".out", "w", stdout);
ios_base::sync_with_stdio(0);
cin >> n >> m;
for (int i = 0; i < m; ++i) {
cin >> b[i] >> p[i];
s[b[i]].insert(p[i]);
}
for (int i = 0; i < n; ++i)
for (auto p : s[i]) {
for (int j = 1; i + j * p < n; ++j) {
g[i].push_back({i + j * p, j});
if (s[i + j * p].count(p))
break;
}
for (int j = 1; i - j * p >= 0; ++j) {
g[i].push_back({i - j * p, j});
if (s[i - j * p].count(p))
break;
}
}
for (int i = 0; i < n; ++i)
random_shuffle(g[i].begin(), g[i].end());
priority_queue < pair < int, int > > p;
fill(d, d + n + 1, oo);
d[b[0]] = 0;
p.push({0, b[0]});
while (!p.empty()) {
int dist = p.top().first, u = p.top().second; p.pop();
if (d[u] != -dist) continue;
for (auto i : g[u]) {
int v = i.first, w = i.second;
if (d[v] > d[u] + w) {
d[v] = d[u] + w;
p.push({-d[v], v});
}
}
}
cout << (d[b[1]] == oo ? -1 : d[b[1]]);
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
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 |
| # |
결과 |
실행 시간 |
메모리 |
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 |
6 ms |
2560 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2560 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
2560 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 |
2432 KB |
Output is correct |
| 11 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 13 |
Correct |
7 ms |
2432 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 15 |
Correct |
6 ms |
2688 KB |
Output is correct |
| 16 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 17 |
Correct |
8 ms |
2816 KB |
Output is correct |
| 18 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 19 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 20 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 22 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 23 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 24 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 25 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 26 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 27 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 28 |
Correct |
8 ms |
2816 KB |
Output is correct |
| 29 |
Correct |
9 ms |
3200 KB |
Output is correct |
| 30 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 31 |
Correct |
8 ms |
2944 KB |
Output is correct |
| 32 |
Correct |
8 ms |
2816 KB |
Output is correct |
| 33 |
Correct |
12 ms |
3708 KB |
Output is correct |
| 34 |
Correct |
12 ms |
3836 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
2464 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 |
2560 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 15 |
Correct |
6 ms |
2688 KB |
Output is correct |
| 16 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 17 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 18 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 19 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 20 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 22 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 23 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 24 |
Correct |
8 ms |
2816 KB |
Output is correct |
| 25 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 26 |
Correct |
8 ms |
2560 KB |
Output is correct |
| 27 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 28 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 29 |
Correct |
9 ms |
3200 KB |
Output is correct |
| 30 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 31 |
Correct |
8 ms |
2944 KB |
Output is correct |
| 32 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 33 |
Correct |
12 ms |
3708 KB |
Output is correct |
| 34 |
Correct |
12 ms |
3836 KB |
Output is correct |
| 35 |
Correct |
24 ms |
4864 KB |
Output is correct |
| 36 |
Correct |
9 ms |
2944 KB |
Output is correct |
| 37 |
Correct |
28 ms |
5632 KB |
Output is correct |
| 38 |
Correct |
33 ms |
5888 KB |
Output is correct |
| 39 |
Correct |
31 ms |
5888 KB |
Output is correct |
| 40 |
Correct |
31 ms |
5888 KB |
Output is correct |
| 41 |
Correct |
31 ms |
5888 KB |
Output is correct |
| 42 |
Correct |
11 ms |
2816 KB |
Output is correct |
| 43 |
Correct |
11 ms |
2816 KB |
Output is correct |
| 44 |
Correct |
11 ms |
2816 KB |
Output is correct |
| 45 |
Correct |
42 ms |
8312 KB |
Output is correct |
| 46 |
Correct |
37 ms |
8312 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
5 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 |
2560 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2432 KB |
Output is correct |
| 14 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 15 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 16 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 17 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 18 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 19 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 20 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 22 |
Correct |
6 ms |
2560 KB |
Output is correct |
| 23 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 24 |
Correct |
9 ms |
2688 KB |
Output is correct |
| 25 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 26 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 27 |
Correct |
7 ms |
2560 KB |
Output is correct |
| 28 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 29 |
Correct |
9 ms |
3200 KB |
Output is correct |
| 30 |
Correct |
7 ms |
2688 KB |
Output is correct |
| 31 |
Correct |
8 ms |
2944 KB |
Output is correct |
| 32 |
Correct |
7 ms |
2816 KB |
Output is correct |
| 33 |
Correct |
12 ms |
3708 KB |
Output is correct |
| 34 |
Correct |
12 ms |
3836 KB |
Output is correct |
| 35 |
Correct |
24 ms |
4864 KB |
Output is correct |
| 36 |
Correct |
9 ms |
2944 KB |
Output is correct |
| 37 |
Correct |
27 ms |
5624 KB |
Output is correct |
| 38 |
Correct |
31 ms |
6016 KB |
Output is correct |
| 39 |
Correct |
31 ms |
5888 KB |
Output is correct |
| 40 |
Correct |
31 ms |
5880 KB |
Output is correct |
| 41 |
Correct |
32 ms |
5888 KB |
Output is correct |
| 42 |
Correct |
15 ms |
2816 KB |
Output is correct |
| 43 |
Correct |
12 ms |
2816 KB |
Output is correct |
| 44 |
Correct |
11 ms |
2816 KB |
Output is correct |
| 45 |
Correct |
36 ms |
8320 KB |
Output is correct |
| 46 |
Correct |
37 ms |
8320 KB |
Output is correct |
| 47 |
Correct |
69 ms |
13044 KB |
Output is correct |
| 48 |
Correct |
27 ms |
6132 KB |
Output is correct |
| 49 |
Correct |
21 ms |
5248 KB |
Output is correct |
| 50 |
Correct |
18 ms |
4864 KB |
Output is correct |
| 51 |
Correct |
60 ms |
8164 KB |
Output is correct |
| 52 |
Correct |
55 ms |
8572 KB |
Output is correct |
| 53 |
Correct |
29 ms |
5756 KB |
Output is correct |
| 54 |
Correct |
9 ms |
3072 KB |
Output is correct |
| 55 |
Correct |
12 ms |
3452 KB |
Output is correct |
| 56 |
Correct |
20 ms |
5120 KB |
Output is correct |
| 57 |
Correct |
57 ms |
11644 KB |
Output is correct |
| 58 |
Correct |
17 ms |
3832 KB |
Output is correct |
| 59 |
Correct |
20 ms |
4220 KB |
Output is correct |
| 60 |
Correct |
23 ms |
4860 KB |
Output is correct |
| 61 |
Correct |
21 ms |
4224 KB |
Output is correct |
| 62 |
Correct |
38 ms |
9332 KB |
Output is correct |
| 63 |
Correct |
120 ms |
25584 KB |
Output is correct |
| 64 |
Correct |
133 ms |
28912 KB |
Output is correct |
| 65 |
Correct |
184 ms |
38544 KB |
Output is correct |
| 66 |
Correct |
304 ms |
63584 KB |
Output is correct |
| 67 |
Correct |
312 ms |
63712 KB |
Output is correct |
