#include <bits/stdc++.h>
#define ff first
#define ss second
#define PHB push_back
#define fastio ios::sync_with_stdio(false);cin.tie(nullptr);
#define ln '\n'
#define nwln cout<<ln;
#define v(T) vector<T>
#define PQ(T) priority_queue<T, v(T), greater<T>>
using namespace std;
typedef pair<int, int> pi;
typedef vector<int> vri;
typedef vector<pi> vpi;
typedef vector<vpi> vvpi;
const int INF = 1001001001;
const int MAXN = 30003;
int N, M, NE, KO;
set<int> B[MAXN];
vri dist;
vvpi adj;
void dijkstra(int src) {
dist.assign(N, INF);
dist[src] = 0;
PQ(pi) pq;
pq.push({0, src});
while(!pq.empty()) {
int v = pq.top().ss, d_v = pq.top().ff;
pq.pop();
if(d_v != dist[v]) continue;
for(pi edge: adj[v]) {
int w = edge.ss, u = edge.ff;
if(dist[v] + w < dist[u]) {
dist[u] = dist[v] + w;
pq.push({dist[u], u});
}
}
}
}
int main()
{
fastio
cin>>N>>M, adj.resize(N);
for(int i=0; i<M; ++i) {
int b, p;
cin>>b>>p;
if(i == 1) KO = b;
else if(!i) NE = b;
B[b].insert(p);
}
for(int i=0; i<N; ++i) {
for(int p: B[i]) {
int pos = i+p, cost = 1;
while(pos < N) {
adj[i].PHB({pos, cost});
if(B[pos].count(p)) break;
++cost, pos += p;
}
pos = i-p, cost = 1;
while(pos >= 0) {
adj[i].PHB({pos, cost});
if(B[pos].count(p)) break;
++cost, pos -= p;
}
}
}
dijkstra(NE);
if(dist[KO] == INF) cout<<-1;
else cout<<dist[KO];
nwln
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1620 KB |
Output is correct |
2 |
Correct |
1 ms |
1620 KB |
Output is correct |
3 |
Correct |
2 ms |
1620 KB |
Output is correct |
4 |
Correct |
1 ms |
1620 KB |
Output is correct |
5 |
Correct |
1 ms |
1620 KB |
Output is correct |
6 |
Correct |
1 ms |
1620 KB |
Output is correct |
7 |
Correct |
1 ms |
1620 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1620 KB |
Output is correct |
2 |
Correct |
1 ms |
1620 KB |
Output is correct |
3 |
Correct |
1 ms |
1620 KB |
Output is correct |
4 |
Correct |
1 ms |
1676 KB |
Output is correct |
5 |
Correct |
2 ms |
1620 KB |
Output is correct |
6 |
Correct |
1 ms |
1620 KB |
Output is correct |
7 |
Correct |
1 ms |
1620 KB |
Output is correct |
8 |
Correct |
1 ms |
1620 KB |
Output is correct |
9 |
Correct |
1 ms |
1620 KB |
Output is correct |
10 |
Correct |
2 ms |
1748 KB |
Output is correct |
11 |
Correct |
2 ms |
1748 KB |
Output is correct |
12 |
Correct |
1 ms |
1620 KB |
Output is correct |
13 |
Correct |
2 ms |
1620 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1816 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1620 KB |
Output is correct |
2 |
Correct |
1 ms |
1620 KB |
Output is correct |
3 |
Correct |
1 ms |
1620 KB |
Output is correct |
4 |
Correct |
1 ms |
1620 KB |
Output is correct |
5 |
Correct |
1 ms |
1620 KB |
Output is correct |
6 |
Correct |
1 ms |
1620 KB |
Output is correct |
7 |
Correct |
1 ms |
1620 KB |
Output is correct |
8 |
Correct |
2 ms |
1620 KB |
Output is correct |
9 |
Correct |
1 ms |
1620 KB |
Output is correct |
10 |
Correct |
1 ms |
1748 KB |
Output is correct |
11 |
Correct |
2 ms |
1748 KB |
Output is correct |
12 |
Correct |
2 ms |
1736 KB |
Output is correct |
13 |
Correct |
1 ms |
1620 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1876 KB |
Output is correct |
16 |
Correct |
1 ms |
1748 KB |
Output is correct |
17 |
Correct |
2 ms |
2004 KB |
Output is correct |
18 |
Correct |
1 ms |
1876 KB |
Output is correct |
19 |
Correct |
1 ms |
1748 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
1 ms |
1748 KB |
Output is correct |
22 |
Correct |
1 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
3 ms |
2004 KB |
Output is correct |
25 |
Correct |
2 ms |
2004 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1876 KB |
Output is correct |
28 |
Correct |
2 ms |
2004 KB |
Output is correct |
29 |
Correct |
4 ms |
2516 KB |
Output is correct |
30 |
Correct |
2 ms |
2004 KB |
Output is correct |
31 |
Correct |
3 ms |
2260 KB |
Output is correct |
32 |
Correct |
2 ms |
2132 KB |
Output is correct |
33 |
Correct |
7 ms |
3412 KB |
Output is correct |
34 |
Correct |
7 ms |
3412 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1620 KB |
Output is correct |
2 |
Correct |
1 ms |
1620 KB |
Output is correct |
3 |
Correct |
2 ms |
1620 KB |
Output is correct |
4 |
Correct |
1 ms |
1620 KB |
Output is correct |
5 |
Correct |
1 ms |
1664 KB |
Output is correct |
6 |
Correct |
1 ms |
1620 KB |
Output is correct |
7 |
Correct |
1 ms |
1620 KB |
Output is correct |
8 |
Correct |
1 ms |
1620 KB |
Output is correct |
9 |
Correct |
1 ms |
1620 KB |
Output is correct |
10 |
Correct |
1 ms |
1748 KB |
Output is correct |
11 |
Correct |
3 ms |
1748 KB |
Output is correct |
12 |
Correct |
1 ms |
1620 KB |
Output is correct |
13 |
Correct |
2 ms |
1620 KB |
Output is correct |
14 |
Correct |
2 ms |
1800 KB |
Output is correct |
15 |
Correct |
2 ms |
1808 KB |
Output is correct |
16 |
Correct |
1 ms |
1748 KB |
Output is correct |
17 |
Correct |
3 ms |
2004 KB |
Output is correct |
18 |
Correct |
2 ms |
1876 KB |
Output is correct |
19 |
Correct |
1 ms |
1748 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
1 ms |
1748 KB |
Output is correct |
22 |
Correct |
1 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
2 ms |
2004 KB |
Output is correct |
25 |
Correct |
4 ms |
2004 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1876 KB |
Output is correct |
28 |
Correct |
2 ms |
2004 KB |
Output is correct |
29 |
Correct |
4 ms |
2516 KB |
Output is correct |
30 |
Correct |
2 ms |
2004 KB |
Output is correct |
31 |
Correct |
3 ms |
2260 KB |
Output is correct |
32 |
Correct |
2 ms |
2128 KB |
Output is correct |
33 |
Correct |
6 ms |
3412 KB |
Output is correct |
34 |
Correct |
6 ms |
3412 KB |
Output is correct |
35 |
Correct |
13 ms |
3968 KB |
Output is correct |
36 |
Correct |
3 ms |
2132 KB |
Output is correct |
37 |
Correct |
17 ms |
4648 KB |
Output is correct |
38 |
Correct |
20 ms |
4884 KB |
Output is correct |
39 |
Correct |
22 ms |
4876 KB |
Output is correct |
40 |
Correct |
21 ms |
4912 KB |
Output is correct |
41 |
Correct |
24 ms |
4924 KB |
Output is correct |
42 |
Correct |
6 ms |
1876 KB |
Output is correct |
43 |
Correct |
6 ms |
1876 KB |
Output is correct |
44 |
Correct |
5 ms |
1944 KB |
Output is correct |
45 |
Correct |
27 ms |
7596 KB |
Output is correct |
46 |
Correct |
30 ms |
7628 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1620 KB |
Output is correct |
2 |
Correct |
1 ms |
1620 KB |
Output is correct |
3 |
Correct |
2 ms |
1620 KB |
Output is correct |
4 |
Correct |
1 ms |
1620 KB |
Output is correct |
5 |
Correct |
2 ms |
1620 KB |
Output is correct |
6 |
Correct |
1 ms |
1620 KB |
Output is correct |
7 |
Correct |
1 ms |
1620 KB |
Output is correct |
8 |
Correct |
1 ms |
1620 KB |
Output is correct |
9 |
Correct |
1 ms |
1620 KB |
Output is correct |
10 |
Correct |
1 ms |
1748 KB |
Output is correct |
11 |
Correct |
2 ms |
1876 KB |
Output is correct |
12 |
Correct |
1 ms |
1620 KB |
Output is correct |
13 |
Correct |
2 ms |
1620 KB |
Output is correct |
14 |
Correct |
2 ms |
1876 KB |
Output is correct |
15 |
Correct |
2 ms |
1876 KB |
Output is correct |
16 |
Correct |
2 ms |
1748 KB |
Output is correct |
17 |
Correct |
2 ms |
2004 KB |
Output is correct |
18 |
Correct |
2 ms |
1876 KB |
Output is correct |
19 |
Correct |
1 ms |
1748 KB |
Output is correct |
20 |
Correct |
2 ms |
1876 KB |
Output is correct |
21 |
Correct |
2 ms |
1748 KB |
Output is correct |
22 |
Correct |
2 ms |
1876 KB |
Output is correct |
23 |
Correct |
2 ms |
1876 KB |
Output is correct |
24 |
Correct |
3 ms |
2004 KB |
Output is correct |
25 |
Correct |
3 ms |
2004 KB |
Output is correct |
26 |
Correct |
2 ms |
1876 KB |
Output is correct |
27 |
Correct |
2 ms |
1832 KB |
Output is correct |
28 |
Correct |
2 ms |
2004 KB |
Output is correct |
29 |
Correct |
4 ms |
2516 KB |
Output is correct |
30 |
Correct |
3 ms |
2004 KB |
Output is correct |
31 |
Correct |
4 ms |
2260 KB |
Output is correct |
32 |
Correct |
3 ms |
2132 KB |
Output is correct |
33 |
Correct |
7 ms |
3412 KB |
Output is correct |
34 |
Correct |
9 ms |
3412 KB |
Output is correct |
35 |
Correct |
19 ms |
3916 KB |
Output is correct |
36 |
Correct |
3 ms |
2132 KB |
Output is correct |
37 |
Correct |
16 ms |
4692 KB |
Output is correct |
38 |
Correct |
20 ms |
4948 KB |
Output is correct |
39 |
Correct |
27 ms |
4924 KB |
Output is correct |
40 |
Correct |
19 ms |
4860 KB |
Output is correct |
41 |
Correct |
25 ms |
4900 KB |
Output is correct |
42 |
Correct |
6 ms |
1784 KB |
Output is correct |
43 |
Correct |
9 ms |
1876 KB |
Output is correct |
44 |
Correct |
9 ms |
1876 KB |
Output is correct |
45 |
Correct |
30 ms |
7636 KB |
Output is correct |
46 |
Correct |
25 ms |
7696 KB |
Output is correct |
47 |
Correct |
44 ms |
12368 KB |
Output is correct |
48 |
Correct |
14 ms |
5712 KB |
Output is correct |
49 |
Correct |
12 ms |
4804 KB |
Output is correct |
50 |
Correct |
9 ms |
4692 KB |
Output is correct |
51 |
Correct |
42 ms |
7864 KB |
Output is correct |
52 |
Correct |
39 ms |
8340 KB |
Output is correct |
53 |
Correct |
25 ms |
5320 KB |
Output is correct |
54 |
Correct |
4 ms |
3028 KB |
Output is correct |
55 |
Correct |
6 ms |
3408 KB |
Output is correct |
56 |
Correct |
16 ms |
4892 KB |
Output is correct |
57 |
Correct |
35 ms |
11600 KB |
Output is correct |
58 |
Correct |
9 ms |
3588 KB |
Output is correct |
59 |
Correct |
10 ms |
3920 KB |
Output is correct |
60 |
Correct |
11 ms |
4484 KB |
Output is correct |
61 |
Correct |
14 ms |
3924 KB |
Output is correct |
62 |
Correct |
24 ms |
9040 KB |
Output is correct |
63 |
Correct |
77 ms |
26428 KB |
Output is correct |
64 |
Correct |
117 ms |
29532 KB |
Output is correct |
65 |
Correct |
117 ms |
39160 KB |
Output is correct |
66 |
Correct |
198 ms |
67536 KB |
Output is correct |
67 |
Correct |
203 ms |
67504 KB |
Output is correct |