#include <queue>
#include <cstdio>
#include <tuple>
#include <cstring>
#include <iostream>
#define pii pair<int, int>
#define piii tuple<int, int, int>
#define mt make_tuple
#define push_back emplace_back
using namespace std;
int N, M;
pii A[30005];
int dist[30005][180];
int vis[30005][180];
vector<pii> adj[30005];
vector<int> dog[30005];
void BFS() {
priority_queue <piii, vector<piii>, greater<piii>> pq;
memset(dist, 0x3f3f3f3f, sizeof(dist));
pq.push(make_tuple(0, A[0].first, 0));
dist[A[0].first][0] = 0;
int u, mov; int trav;
while(!pq.empty()) {
tie(trav, u, mov) = pq.top();
pq.pop();
if(dist[u][mov] < trav) continue;
if(mov != 0) {
if(u - mov >= 0 && trav + 1 < dist[u - mov][mov]) {
dist[u - mov][mov] = trav + 1;
pq.push(make_tuple(trav + 1, u - mov, mov));
}
if(u + mov <= N && trav + 1 < dist[u + mov][mov]) {
dist[u + mov][mov] = trav + 1;
pq.push(make_tuple(trav + 1, u + mov, mov));
}
if(dist[u][0] > trav) {
dist[u][0] = trav;
pq.push(make_tuple(trav, u, 0));
}
}else {
int v, w;
for(pii now : adj[u]) {
v = now.first, w = now.second + trav;
if(w < dist[v][0]) {
dist[v][0] = w;
pq.push(make_tuple(w, v, 0));
}
}
for(int v : dog[u]) {
if(trav < dist[u][v]) {
dist[u][v] = trav;
pq.push(make_tuple(trav, u, v));
}
}
}
}
if(dist[A[1].first][0] == 0x3f3f3f3f) puts("-1");
else printf("%d\n", dist[A[1].first][0]);
}
int main() {
// freopen("out.txt", "w", stdout);
scanf("%d %d", &N, &M);
int pos, mov;
for(int i = 0; i < M; i++) {
scanf("%d %d", &pos, &mov);
A[i] = make_pair(pos, mov);
if(mov * mov > N) {
for(int i = pos - mov, j = 1; i >= 0; i -= mov, j++) {
adj[pos].push_back(i, j);
}
for(int i = pos + mov, j = 1; i <= N; i += mov, j++) {
adj[pos].push_back(i, j);
}
}else {
dog[pos].push_back(mov);
}
}
BFS();
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:65:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &N, &M);
~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:68:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &pos, &mov);
~~~~~^~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
22912 KB |
Output is correct |
2 |
Correct |
18 ms |
22912 KB |
Output is correct |
3 |
Correct |
17 ms |
22912 KB |
Output is correct |
4 |
Correct |
17 ms |
22912 KB |
Output is correct |
5 |
Correct |
17 ms |
22912 KB |
Output is correct |
6 |
Correct |
17 ms |
22912 KB |
Output is correct |
7 |
Correct |
16 ms |
22912 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
22912 KB |
Output is correct |
2 |
Correct |
16 ms |
22912 KB |
Output is correct |
3 |
Correct |
17 ms |
22912 KB |
Output is correct |
4 |
Correct |
18 ms |
22944 KB |
Output is correct |
5 |
Correct |
17 ms |
22912 KB |
Output is correct |
6 |
Correct |
17 ms |
22912 KB |
Output is correct |
7 |
Correct |
17 ms |
22912 KB |
Output is correct |
8 |
Correct |
18 ms |
22912 KB |
Output is correct |
9 |
Correct |
17 ms |
22912 KB |
Output is correct |
10 |
Correct |
18 ms |
22912 KB |
Output is correct |
11 |
Correct |
17 ms |
22912 KB |
Output is correct |
12 |
Correct |
17 ms |
22912 KB |
Output is correct |
13 |
Correct |
17 ms |
22936 KB |
Output is correct |
14 |
Correct |
18 ms |
22912 KB |
Output is correct |
15 |
Correct |
18 ms |
22912 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
22912 KB |
Output is correct |
2 |
Correct |
18 ms |
22912 KB |
Output is correct |
3 |
Correct |
17 ms |
22912 KB |
Output is correct |
4 |
Correct |
18 ms |
22912 KB |
Output is correct |
5 |
Correct |
17 ms |
22912 KB |
Output is correct |
6 |
Correct |
17 ms |
22912 KB |
Output is correct |
7 |
Correct |
17 ms |
22912 KB |
Output is correct |
8 |
Correct |
17 ms |
22912 KB |
Output is correct |
9 |
Correct |
16 ms |
22912 KB |
Output is correct |
10 |
Correct |
17 ms |
22912 KB |
Output is correct |
11 |
Correct |
18 ms |
22944 KB |
Output is correct |
12 |
Correct |
18 ms |
22912 KB |
Output is correct |
13 |
Correct |
19 ms |
22912 KB |
Output is correct |
14 |
Correct |
18 ms |
23040 KB |
Output is correct |
15 |
Correct |
18 ms |
22912 KB |
Output is correct |
16 |
Correct |
17 ms |
22912 KB |
Output is correct |
17 |
Correct |
18 ms |
23040 KB |
Output is correct |
18 |
Correct |
17 ms |
22912 KB |
Output is correct |
19 |
Correct |
17 ms |
22912 KB |
Output is correct |
20 |
Correct |
19 ms |
23040 KB |
Output is correct |
21 |
Correct |
17 ms |
22912 KB |
Output is correct |
22 |
Correct |
17 ms |
22912 KB |
Output is correct |
23 |
Correct |
18 ms |
22912 KB |
Output is correct |
24 |
Correct |
19 ms |
23040 KB |
Output is correct |
25 |
Correct |
19 ms |
22912 KB |
Output is correct |
26 |
Correct |
18 ms |
23040 KB |
Output is correct |
27 |
Correct |
18 ms |
22912 KB |
Output is correct |
28 |
Correct |
18 ms |
23040 KB |
Output is correct |
29 |
Correct |
23 ms |
22912 KB |
Output is correct |
30 |
Correct |
19 ms |
22912 KB |
Output is correct |
31 |
Correct |
22 ms |
22960 KB |
Output is correct |
32 |
Correct |
19 ms |
23040 KB |
Output is correct |
33 |
Correct |
28 ms |
23552 KB |
Output is correct |
34 |
Correct |
29 ms |
23552 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
22912 KB |
Output is correct |
2 |
Correct |
18 ms |
22912 KB |
Output is correct |
3 |
Correct |
17 ms |
22912 KB |
Output is correct |
4 |
Correct |
17 ms |
22912 KB |
Output is correct |
5 |
Correct |
17 ms |
22912 KB |
Output is correct |
6 |
Correct |
17 ms |
22912 KB |
Output is correct |
7 |
Correct |
17 ms |
22912 KB |
Output is correct |
8 |
Correct |
17 ms |
22912 KB |
Output is correct |
9 |
Correct |
18 ms |
22912 KB |
Output is correct |
10 |
Correct |
17 ms |
22912 KB |
Output is correct |
11 |
Correct |
19 ms |
22912 KB |
Output is correct |
12 |
Correct |
18 ms |
22912 KB |
Output is correct |
13 |
Correct |
18 ms |
22912 KB |
Output is correct |
14 |
Correct |
20 ms |
23040 KB |
Output is correct |
15 |
Correct |
18 ms |
22912 KB |
Output is correct |
16 |
Correct |
18 ms |
22912 KB |
Output is correct |
17 |
Correct |
19 ms |
23040 KB |
Output is correct |
18 |
Correct |
17 ms |
22912 KB |
Output is correct |
19 |
Correct |
17 ms |
22912 KB |
Output is correct |
20 |
Correct |
19 ms |
23016 KB |
Output is correct |
21 |
Correct |
18 ms |
22912 KB |
Output is correct |
22 |
Correct |
17 ms |
22912 KB |
Output is correct |
23 |
Correct |
18 ms |
22912 KB |
Output is correct |
24 |
Correct |
18 ms |
23040 KB |
Output is correct |
25 |
Correct |
18 ms |
22912 KB |
Output is correct |
26 |
Correct |
18 ms |
22912 KB |
Output is correct |
27 |
Correct |
18 ms |
22912 KB |
Output is correct |
28 |
Correct |
18 ms |
23040 KB |
Output is correct |
29 |
Correct |
23 ms |
22912 KB |
Output is correct |
30 |
Correct |
18 ms |
22912 KB |
Output is correct |
31 |
Correct |
21 ms |
22912 KB |
Output is correct |
32 |
Correct |
19 ms |
23040 KB |
Output is correct |
33 |
Correct |
28 ms |
23552 KB |
Output is correct |
34 |
Correct |
28 ms |
23552 KB |
Output is correct |
35 |
Correct |
29 ms |
24064 KB |
Output is correct |
36 |
Correct |
19 ms |
23040 KB |
Output is correct |
37 |
Correct |
35 ms |
24576 KB |
Output is correct |
38 |
Correct |
37 ms |
24568 KB |
Output is correct |
39 |
Correct |
35 ms |
24568 KB |
Output is correct |
40 |
Correct |
35 ms |
24576 KB |
Output is correct |
41 |
Correct |
35 ms |
24568 KB |
Output is correct |
42 |
Correct |
24 ms |
23680 KB |
Output is correct |
43 |
Correct |
24 ms |
23552 KB |
Output is correct |
44 |
Correct |
23 ms |
23552 KB |
Output is correct |
45 |
Correct |
41 ms |
27392 KB |
Output is correct |
46 |
Correct |
41 ms |
27384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
22912 KB |
Output is correct |
2 |
Correct |
17 ms |
22912 KB |
Output is correct |
3 |
Correct |
17 ms |
22912 KB |
Output is correct |
4 |
Correct |
17 ms |
22912 KB |
Output is correct |
5 |
Correct |
17 ms |
22912 KB |
Output is correct |
6 |
Correct |
18 ms |
22912 KB |
Output is correct |
7 |
Correct |
17 ms |
22912 KB |
Output is correct |
8 |
Correct |
17 ms |
22912 KB |
Output is correct |
9 |
Correct |
16 ms |
22912 KB |
Output is correct |
10 |
Correct |
18 ms |
22912 KB |
Output is correct |
11 |
Correct |
18 ms |
22912 KB |
Output is correct |
12 |
Correct |
18 ms |
22912 KB |
Output is correct |
13 |
Correct |
17 ms |
22912 KB |
Output is correct |
14 |
Correct |
17 ms |
22912 KB |
Output is correct |
15 |
Correct |
17 ms |
22912 KB |
Output is correct |
16 |
Correct |
17 ms |
22912 KB |
Output is correct |
17 |
Correct |
18 ms |
23040 KB |
Output is correct |
18 |
Correct |
18 ms |
22912 KB |
Output is correct |
19 |
Correct |
17 ms |
22912 KB |
Output is correct |
20 |
Correct |
17 ms |
23040 KB |
Output is correct |
21 |
Correct |
17 ms |
22912 KB |
Output is correct |
22 |
Correct |
17 ms |
22912 KB |
Output is correct |
23 |
Correct |
18 ms |
22912 KB |
Output is correct |
24 |
Correct |
19 ms |
23040 KB |
Output is correct |
25 |
Correct |
20 ms |
22912 KB |
Output is correct |
26 |
Correct |
17 ms |
23040 KB |
Output is correct |
27 |
Correct |
18 ms |
22912 KB |
Output is correct |
28 |
Correct |
19 ms |
23168 KB |
Output is correct |
29 |
Correct |
24 ms |
22912 KB |
Output is correct |
30 |
Correct |
19 ms |
22912 KB |
Output is correct |
31 |
Correct |
21 ms |
22912 KB |
Output is correct |
32 |
Correct |
19 ms |
23040 KB |
Output is correct |
33 |
Correct |
29 ms |
23552 KB |
Output is correct |
34 |
Correct |
29 ms |
23552 KB |
Output is correct |
35 |
Correct |
29 ms |
23928 KB |
Output is correct |
36 |
Correct |
19 ms |
23040 KB |
Output is correct |
37 |
Correct |
33 ms |
24576 KB |
Output is correct |
38 |
Correct |
35 ms |
24576 KB |
Output is correct |
39 |
Correct |
35 ms |
24568 KB |
Output is correct |
40 |
Correct |
35 ms |
24576 KB |
Output is correct |
41 |
Correct |
35 ms |
24576 KB |
Output is correct |
42 |
Correct |
23 ms |
23552 KB |
Output is correct |
43 |
Correct |
24 ms |
23552 KB |
Output is correct |
44 |
Correct |
25 ms |
23544 KB |
Output is correct |
45 |
Correct |
40 ms |
27384 KB |
Output is correct |
46 |
Correct |
42 ms |
27648 KB |
Output is correct |
47 |
Correct |
102 ms |
28088 KB |
Output is correct |
48 |
Correct |
28 ms |
24448 KB |
Output is correct |
49 |
Correct |
27 ms |
24192 KB |
Output is correct |
50 |
Correct |
24 ms |
23936 KB |
Output is correct |
51 |
Correct |
71 ms |
25596 KB |
Output is correct |
52 |
Correct |
83 ms |
25656 KB |
Output is correct |
53 |
Correct |
31 ms |
23552 KB |
Output is correct |
54 |
Correct |
17 ms |
22912 KB |
Output is correct |
55 |
Correct |
17 ms |
22912 KB |
Output is correct |
56 |
Correct |
28 ms |
24320 KB |
Output is correct |
57 |
Correct |
93 ms |
23040 KB |
Output is correct |
58 |
Correct |
25 ms |
23416 KB |
Output is correct |
59 |
Correct |
28 ms |
23680 KB |
Output is correct |
60 |
Correct |
32 ms |
23800 KB |
Output is correct |
61 |
Correct |
28 ms |
23808 KB |
Output is correct |
62 |
Correct |
47 ms |
25720 KB |
Output is correct |
63 |
Correct |
100 ms |
48048 KB |
Output is correct |
64 |
Correct |
119 ms |
56564 KB |
Output is correct |
65 |
Correct |
392 ms |
55216 KB |
Output is correct |
66 |
Correct |
887 ms |
50604 KB |
Output is correct |
67 |
Correct |
901 ms |
50736 KB |
Output is correct |