using namespace std;
#include <iostream>
#include <bitset>
#include <queue>
#include <vector>
#define MAXN 30005
int N,M,pos[MAXN],po[MAXN];
bitset<MAXN> vis[MAXN],vis2;
queue<pair<int,pair<int,int>>> q;
vector<int> v[MAXN];
void insert(int dist,int x,int p) {
if(~p && !vis[x][p]) {
vis[x][p] = true;
q.push({dist,{x,p}});
}
if(vis2[x]) return;
vis2[x] = true;
for(int u : v[x]) {
if(vis[x][u]) continue;
vis[x][u] = true;
q.push({dist,{x,u}});
}
return;
}
bool within(int n) {
return (n >= 0 && n < N);
}
int main() {
cin >> N >> M;
for(int i = 0;i < M;++i) {
cin >> pos[i] >> po[i];
v[pos[i]].push_back(po[i]);
}
insert(0,pos[0],-1);
while(!q.empty()) {
auto [u,v] = q.front();
auto [a,b] = v;
q.pop();
if(a == pos[1]) {
cout << u << endl;
return 0;
}
if(within(a - b)) insert(u + 1,a - b,b);
if(within(a + b)) insert(u + 1,a + b,b);
}
cout << -1 << endl;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
1124 KB |
Output is correct |
10 |
Correct |
1 ms |
1228 KB |
Output is correct |
11 |
Correct |
2 ms |
1256 KB |
Output is correct |
12 |
Correct |
2 ms |
1276 KB |
Output is correct |
13 |
Correct |
2 ms |
1404 KB |
Output is correct |
14 |
Correct |
2 ms |
1404 KB |
Output is correct |
15 |
Correct |
2 ms |
1356 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1100 KB |
Output is correct |
10 |
Correct |
1 ms |
1264 KB |
Output is correct |
11 |
Correct |
2 ms |
1356 KB |
Output is correct |
12 |
Correct |
2 ms |
1356 KB |
Output is correct |
13 |
Correct |
2 ms |
1308 KB |
Output is correct |
14 |
Correct |
2 ms |
1356 KB |
Output is correct |
15 |
Correct |
2 ms |
1384 KB |
Output is correct |
16 |
Correct |
1 ms |
972 KB |
Output is correct |
17 |
Correct |
3 ms |
3788 KB |
Output is correct |
18 |
Correct |
1 ms |
1024 KB |
Output is correct |
19 |
Correct |
1 ms |
1100 KB |
Output is correct |
20 |
Correct |
6 ms |
8396 KB |
Output is correct |
21 |
Correct |
1 ms |
1024 KB |
Output is correct |
22 |
Correct |
1 ms |
972 KB |
Output is correct |
23 |
Correct |
4 ms |
6268 KB |
Output is correct |
24 |
Correct |
6 ms |
7560 KB |
Output is correct |
25 |
Correct |
3 ms |
2372 KB |
Output is correct |
26 |
Correct |
5 ms |
7372 KB |
Output is correct |
27 |
Correct |
5 ms |
7680 KB |
Output is correct |
28 |
Correct |
7 ms |
8348 KB |
Output is correct |
29 |
Correct |
6 ms |
8396 KB |
Output is correct |
30 |
Correct |
6 ms |
8312 KB |
Output is correct |
31 |
Correct |
5 ms |
8268 KB |
Output is correct |
32 |
Correct |
7 ms |
8268 KB |
Output is correct |
33 |
Correct |
9 ms |
8396 KB |
Output is correct |
34 |
Correct |
7 ms |
8396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1100 KB |
Output is correct |
10 |
Correct |
1 ms |
1248 KB |
Output is correct |
11 |
Correct |
2 ms |
1356 KB |
Output is correct |
12 |
Correct |
2 ms |
1356 KB |
Output is correct |
13 |
Correct |
2 ms |
1388 KB |
Output is correct |
14 |
Correct |
2 ms |
1404 KB |
Output is correct |
15 |
Correct |
2 ms |
1356 KB |
Output is correct |
16 |
Correct |
1 ms |
1028 KB |
Output is correct |
17 |
Correct |
3 ms |
3800 KB |
Output is correct |
18 |
Correct |
1 ms |
1040 KB |
Output is correct |
19 |
Correct |
1 ms |
1032 KB |
Output is correct |
20 |
Correct |
6 ms |
8364 KB |
Output is correct |
21 |
Correct |
1 ms |
972 KB |
Output is correct |
22 |
Correct |
1 ms |
972 KB |
Output is correct |
23 |
Correct |
5 ms |
6360 KB |
Output is correct |
24 |
Correct |
5 ms |
7556 KB |
Output is correct |
25 |
Correct |
2 ms |
2508 KB |
Output is correct |
26 |
Correct |
5 ms |
7372 KB |
Output is correct |
27 |
Correct |
5 ms |
7684 KB |
Output is correct |
28 |
Correct |
6 ms |
8396 KB |
Output is correct |
29 |
Correct |
7 ms |
8396 KB |
Output is correct |
30 |
Correct |
6 ms |
8268 KB |
Output is correct |
31 |
Correct |
6 ms |
8304 KB |
Output is correct |
32 |
Correct |
6 ms |
8268 KB |
Output is correct |
33 |
Correct |
9 ms |
8396 KB |
Output is correct |
34 |
Correct |
8 ms |
8396 KB |
Output is correct |
35 |
Correct |
17 ms |
7300 KB |
Output is correct |
36 |
Correct |
4 ms |
3020 KB |
Output is correct |
37 |
Correct |
14 ms |
8824 KB |
Output is correct |
38 |
Correct |
25 ms |
9412 KB |
Output is correct |
39 |
Correct |
16 ms |
2252 KB |
Output is correct |
40 |
Correct |
23 ms |
4548 KB |
Output is correct |
41 |
Correct |
27 ms |
8808 KB |
Output is correct |
42 |
Correct |
16 ms |
7976 KB |
Output is correct |
43 |
Correct |
16 ms |
8268 KB |
Output is correct |
44 |
Correct |
16 ms |
8964 KB |
Output is correct |
45 |
Correct |
29 ms |
9352 KB |
Output is correct |
46 |
Correct |
28 ms |
9332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1100 KB |
Output is correct |
10 |
Correct |
2 ms |
1228 KB |
Output is correct |
11 |
Correct |
2 ms |
1356 KB |
Output is correct |
12 |
Correct |
2 ms |
1356 KB |
Output is correct |
13 |
Correct |
2 ms |
1356 KB |
Output is correct |
14 |
Correct |
2 ms |
1404 KB |
Output is correct |
15 |
Correct |
2 ms |
1356 KB |
Output is correct |
16 |
Correct |
1 ms |
972 KB |
Output is correct |
17 |
Correct |
5 ms |
3788 KB |
Output is correct |
18 |
Correct |
1 ms |
972 KB |
Output is correct |
19 |
Correct |
1 ms |
1100 KB |
Output is correct |
20 |
Correct |
5 ms |
8396 KB |
Output is correct |
21 |
Correct |
1 ms |
1040 KB |
Output is correct |
22 |
Correct |
1 ms |
1036 KB |
Output is correct |
23 |
Correct |
5 ms |
6268 KB |
Output is correct |
24 |
Correct |
6 ms |
7500 KB |
Output is correct |
25 |
Correct |
3 ms |
2432 KB |
Output is correct |
26 |
Correct |
6 ms |
7372 KB |
Output is correct |
27 |
Correct |
5 ms |
7672 KB |
Output is correct |
28 |
Correct |
7 ms |
8456 KB |
Output is correct |
29 |
Correct |
6 ms |
8396 KB |
Output is correct |
30 |
Correct |
5 ms |
8268 KB |
Output is correct |
31 |
Correct |
6 ms |
8352 KB |
Output is correct |
32 |
Correct |
5 ms |
8268 KB |
Output is correct |
33 |
Correct |
8 ms |
8396 KB |
Output is correct |
34 |
Correct |
7 ms |
8396 KB |
Output is correct |
35 |
Correct |
15 ms |
7172 KB |
Output is correct |
36 |
Correct |
4 ms |
3020 KB |
Output is correct |
37 |
Correct |
15 ms |
8844 KB |
Output is correct |
38 |
Correct |
21 ms |
9396 KB |
Output is correct |
39 |
Correct |
16 ms |
2180 KB |
Output is correct |
40 |
Correct |
17 ms |
4608 KB |
Output is correct |
41 |
Correct |
20 ms |
8780 KB |
Output is correct |
42 |
Correct |
16 ms |
8012 KB |
Output is correct |
43 |
Correct |
18 ms |
8356 KB |
Output is correct |
44 |
Correct |
17 ms |
9012 KB |
Output is correct |
45 |
Correct |
36 ms |
9352 KB |
Output is correct |
46 |
Correct |
23 ms |
9348 KB |
Output is correct |
47 |
Correct |
33 ms |
32248 KB |
Output is correct |
48 |
Correct |
13 ms |
1844 KB |
Output is correct |
49 |
Correct |
13 ms |
1792 KB |
Output is correct |
50 |
Correct |
9 ms |
1596 KB |
Output is correct |
51 |
Correct |
68 ms |
87544 KB |
Output is correct |
52 |
Correct |
74 ms |
94256 KB |
Output is correct |
53 |
Correct |
27 ms |
18928 KB |
Output is correct |
54 |
Correct |
34 ms |
61160 KB |
Output is correct |
55 |
Correct |
44 ms |
77820 KB |
Output is correct |
56 |
Correct |
75 ms |
112404 KB |
Output is correct |
57 |
Correct |
3 ms |
2692 KB |
Output is correct |
58 |
Correct |
78 ms |
111800 KB |
Output is correct |
59 |
Correct |
77 ms |
104084 KB |
Output is correct |
60 |
Correct |
71 ms |
104056 KB |
Output is correct |
61 |
Correct |
74 ms |
99016 KB |
Output is correct |
62 |
Correct |
121 ms |
112556 KB |
Output is correct |
63 |
Correct |
172 ms |
111964 KB |
Output is correct |
64 |
Correct |
168 ms |
111944 KB |
Output is correct |
65 |
Correct |
213 ms |
112128 KB |
Output is correct |
66 |
Correct |
331 ms |
112152 KB |
Output is correct |
67 |
Correct |
207 ms |
112068 KB |
Output is correct |