#include<bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
const int MM = 30030, INF = 0x3f3f3f3f;
set<int> adj[MM];
int dis[MM];
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> cur;
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
for(int i=0; i < MM; i++)dis[i] = INF;
int num, paths, a, b; cin >> num >> paths;
int start = -1, dest = -1;
for(int i=0; i < paths; i++){
cin >> a >> b;
if(i == 0){
start = a;
}else if(i==1){
dest = a;
}
adj[a].insert(b);
}
cur.push({0, start});
dis[start] = 0;
while(!cur.empty()){
pii e = cur.top(); cur.pop();
int cit = e.second, price= e.first;
if(cit == dest){
cout << dis[cit]<<'\n';
return 0;
}
if(dis[cit] < price)continue;
for(int u: adj[cit]){
//go up
for(int i=1; cit + i*u < num; i++){
int nn = cit+i*u;
int add= price+i;
if(dis[nn] > add){
dis[nn] = add;
cur.push({add, nn});
}
if(adj[nn].count(u))break;
}
//go down
for(int i=1; cit-i*u >= 0; i++){
int nn = cit-i*u;
int add = price+i;
if(dis[nn]>add){
dis[nn] = add; cur.push({add, nn});
}
if(adj[nn].count(u))break;
}
}
}
cout << -1;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1900 KB |
Output is correct |
2 |
Correct |
1 ms |
1900 KB |
Output is correct |
3 |
Correct |
2 ms |
1900 KB |
Output is correct |
4 |
Correct |
2 ms |
1900 KB |
Output is correct |
5 |
Correct |
2 ms |
1900 KB |
Output is correct |
6 |
Correct |
1 ms |
1900 KB |
Output is correct |
7 |
Correct |
2 ms |
2028 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1900 KB |
Output is correct |
2 |
Correct |
1 ms |
1900 KB |
Output is correct |
3 |
Correct |
1 ms |
1900 KB |
Output is correct |
4 |
Correct |
1 ms |
1900 KB |
Output is correct |
5 |
Correct |
1 ms |
1900 KB |
Output is correct |
6 |
Correct |
1 ms |
1900 KB |
Output is correct |
7 |
Correct |
2 ms |
1900 KB |
Output is correct |
8 |
Correct |
1 ms |
1900 KB |
Output is correct |
9 |
Correct |
1 ms |
1900 KB |
Output is correct |
10 |
Correct |
2 ms |
1900 KB |
Output is correct |
11 |
Correct |
2 ms |
1900 KB |
Output is correct |
12 |
Correct |
3 ms |
1900 KB |
Output is correct |
13 |
Correct |
2 ms |
1900 KB |
Output is correct |
14 |
Correct |
2 ms |
2028 KB |
Output is correct |
15 |
Correct |
2 ms |
2028 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1900 KB |
Output is correct |
2 |
Correct |
1 ms |
1900 KB |
Output is correct |
3 |
Correct |
1 ms |
1900 KB |
Output is correct |
4 |
Correct |
2 ms |
1900 KB |
Output is correct |
5 |
Correct |
1 ms |
1900 KB |
Output is correct |
6 |
Correct |
2 ms |
1900 KB |
Output is correct |
7 |
Correct |
1 ms |
1900 KB |
Output is correct |
8 |
Correct |
1 ms |
1900 KB |
Output is correct |
9 |
Correct |
2 ms |
1900 KB |
Output is correct |
10 |
Correct |
2 ms |
1908 KB |
Output is correct |
11 |
Correct |
3 ms |
1900 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
2 ms |
1900 KB |
Output is correct |
14 |
Correct |
3 ms |
2028 KB |
Output is correct |
15 |
Correct |
2 ms |
2028 KB |
Output is correct |
16 |
Correct |
2 ms |
1900 KB |
Output is correct |
17 |
Correct |
2 ms |
2028 KB |
Output is correct |
18 |
Correct |
2 ms |
1900 KB |
Output is correct |
19 |
Correct |
2 ms |
1900 KB |
Output is correct |
20 |
Correct |
2 ms |
2028 KB |
Output is correct |
21 |
Correct |
2 ms |
1900 KB |
Output is correct |
22 |
Correct |
2 ms |
1900 KB |
Output is correct |
23 |
Correct |
2 ms |
1900 KB |
Output is correct |
24 |
Correct |
3 ms |
2028 KB |
Output is correct |
25 |
Correct |
3 ms |
2028 KB |
Output is correct |
26 |
Correct |
2 ms |
1900 KB |
Output is correct |
27 |
Correct |
2 ms |
1900 KB |
Output is correct |
28 |
Correct |
2 ms |
2028 KB |
Output is correct |
29 |
Correct |
4 ms |
2156 KB |
Output is correct |
30 |
Correct |
2 ms |
2028 KB |
Output is correct |
31 |
Correct |
3 ms |
2028 KB |
Output is correct |
32 |
Correct |
2 ms |
2028 KB |
Output is correct |
33 |
Correct |
5 ms |
2412 KB |
Output is correct |
34 |
Correct |
4 ms |
2412 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2048 KB |
Output is correct |
2 |
Correct |
1 ms |
1900 KB |
Output is correct |
3 |
Correct |
1 ms |
1900 KB |
Output is correct |
4 |
Correct |
2 ms |
1916 KB |
Output is correct |
5 |
Correct |
1 ms |
1900 KB |
Output is correct |
6 |
Correct |
1 ms |
1900 KB |
Output is correct |
7 |
Correct |
1 ms |
1900 KB |
Output is correct |
8 |
Correct |
1 ms |
1900 KB |
Output is correct |
9 |
Correct |
2 ms |
1900 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1900 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
2 ms |
1900 KB |
Output is correct |
14 |
Correct |
2 ms |
2028 KB |
Output is correct |
15 |
Correct |
2 ms |
2028 KB |
Output is correct |
16 |
Correct |
2 ms |
1900 KB |
Output is correct |
17 |
Correct |
2 ms |
2028 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1900 KB |
Output is correct |
20 |
Correct |
2 ms |
2028 KB |
Output is correct |
21 |
Correct |
2 ms |
1900 KB |
Output is correct |
22 |
Correct |
2 ms |
1900 KB |
Output is correct |
23 |
Correct |
2 ms |
1900 KB |
Output is correct |
24 |
Correct |
3 ms |
2028 KB |
Output is correct |
25 |
Correct |
2 ms |
2028 KB |
Output is correct |
26 |
Correct |
2 ms |
1900 KB |
Output is correct |
27 |
Correct |
2 ms |
1900 KB |
Output is correct |
28 |
Correct |
2 ms |
2028 KB |
Output is correct |
29 |
Correct |
4 ms |
2156 KB |
Output is correct |
30 |
Correct |
2 ms |
2028 KB |
Output is correct |
31 |
Correct |
3 ms |
2048 KB |
Output is correct |
32 |
Correct |
2 ms |
2028 KB |
Output is correct |
33 |
Correct |
6 ms |
2412 KB |
Output is correct |
34 |
Correct |
4 ms |
2412 KB |
Output is correct |
35 |
Correct |
15 ms |
3308 KB |
Output is correct |
36 |
Correct |
3 ms |
2156 KB |
Output is correct |
37 |
Correct |
13 ms |
3052 KB |
Output is correct |
38 |
Correct |
15 ms |
3564 KB |
Output is correct |
39 |
Correct |
12 ms |
3564 KB |
Output is correct |
40 |
Correct |
12 ms |
3564 KB |
Output is correct |
41 |
Correct |
13 ms |
3692 KB |
Output is correct |
42 |
Correct |
6 ms |
2304 KB |
Output is correct |
43 |
Correct |
6 ms |
2156 KB |
Output is correct |
44 |
Correct |
6 ms |
2156 KB |
Output is correct |
45 |
Correct |
19 ms |
3820 KB |
Output is correct |
46 |
Correct |
17 ms |
3948 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
2028 KB |
Output is correct |
2 |
Correct |
2 ms |
2028 KB |
Output is correct |
3 |
Correct |
1 ms |
1900 KB |
Output is correct |
4 |
Correct |
2 ms |
1900 KB |
Output is correct |
5 |
Correct |
1 ms |
1900 KB |
Output is correct |
6 |
Correct |
1 ms |
1900 KB |
Output is correct |
7 |
Correct |
1 ms |
1900 KB |
Output is correct |
8 |
Correct |
1 ms |
1900 KB |
Output is correct |
9 |
Correct |
1 ms |
1900 KB |
Output is correct |
10 |
Correct |
2 ms |
1900 KB |
Output is correct |
11 |
Correct |
2 ms |
1900 KB |
Output is correct |
12 |
Correct |
2 ms |
1900 KB |
Output is correct |
13 |
Correct |
2 ms |
2044 KB |
Output is correct |
14 |
Correct |
2 ms |
2028 KB |
Output is correct |
15 |
Correct |
2 ms |
2048 KB |
Output is correct |
16 |
Correct |
2 ms |
2028 KB |
Output is correct |
17 |
Correct |
2 ms |
2028 KB |
Output is correct |
18 |
Correct |
2 ms |
1900 KB |
Output is correct |
19 |
Correct |
2 ms |
1900 KB |
Output is correct |
20 |
Correct |
2 ms |
2028 KB |
Output is correct |
21 |
Correct |
2 ms |
1900 KB |
Output is correct |
22 |
Correct |
2 ms |
1900 KB |
Output is correct |
23 |
Correct |
2 ms |
1900 KB |
Output is correct |
24 |
Correct |
3 ms |
2028 KB |
Output is correct |
25 |
Correct |
3 ms |
2048 KB |
Output is correct |
26 |
Correct |
3 ms |
1900 KB |
Output is correct |
27 |
Correct |
2 ms |
2028 KB |
Output is correct |
28 |
Correct |
3 ms |
2028 KB |
Output is correct |
29 |
Correct |
5 ms |
2216 KB |
Output is correct |
30 |
Correct |
3 ms |
2028 KB |
Output is correct |
31 |
Correct |
3 ms |
2028 KB |
Output is correct |
32 |
Correct |
2 ms |
2028 KB |
Output is correct |
33 |
Correct |
5 ms |
2412 KB |
Output is correct |
34 |
Correct |
5 ms |
2412 KB |
Output is correct |
35 |
Correct |
15 ms |
3308 KB |
Output is correct |
36 |
Correct |
3 ms |
2156 KB |
Output is correct |
37 |
Correct |
14 ms |
3052 KB |
Output is correct |
38 |
Correct |
14 ms |
3564 KB |
Output is correct |
39 |
Correct |
16 ms |
3564 KB |
Output is correct |
40 |
Correct |
12 ms |
3564 KB |
Output is correct |
41 |
Correct |
14 ms |
3692 KB |
Output is correct |
42 |
Correct |
6 ms |
2028 KB |
Output is correct |
43 |
Correct |
9 ms |
2156 KB |
Output is correct |
44 |
Correct |
6 ms |
2156 KB |
Output is correct |
45 |
Correct |
20 ms |
3820 KB |
Output is correct |
46 |
Correct |
17 ms |
3820 KB |
Output is correct |
47 |
Correct |
20 ms |
3816 KB |
Output is correct |
48 |
Correct |
9 ms |
3180 KB |
Output is correct |
49 |
Correct |
11 ms |
3052 KB |
Output is correct |
50 |
Correct |
7 ms |
2668 KB |
Output is correct |
51 |
Correct |
29 ms |
4200 KB |
Output is correct |
52 |
Correct |
25 ms |
4200 KB |
Output is correct |
53 |
Correct |
13 ms |
3820 KB |
Output is correct |
54 |
Correct |
3 ms |
2156 KB |
Output is correct |
55 |
Correct |
4 ms |
2156 KB |
Output is correct |
56 |
Correct |
12 ms |
3436 KB |
Output is correct |
57 |
Correct |
3 ms |
2412 KB |
Output is correct |
58 |
Correct |
8 ms |
2284 KB |
Output is correct |
59 |
Correct |
9 ms |
2284 KB |
Output is correct |
60 |
Correct |
9 ms |
2284 KB |
Output is correct |
61 |
Correct |
9 ms |
2540 KB |
Output is correct |
62 |
Correct |
17 ms |
3564 KB |
Output is correct |
63 |
Correct |
53 ms |
5856 KB |
Output is correct |
64 |
Correct |
54 ms |
5728 KB |
Output is correct |
65 |
Correct |
64 ms |
5728 KB |
Output is correct |
66 |
Correct |
127 ms |
7772 KB |
Output is correct |
67 |
Correct |
84 ms |
7772 KB |
Output is correct |