#include <bits/stdc++.h>
using namespace std;
const int DIM = 30005;
int ans[DIM];
pair<int, int> arr[DIM];
vector<int> lst[DIM];
bitset<DIM> oki[DIM], vis;
struct str {
int ps, pw, tm; };
deque<str> que;
int main(void) {
#ifdef HOME
freopen("skyscraper.in", "r", stdin);
freopen("skyscraper.out", "w", stdout);
#endif
int n, m; cin >> n >> m;
for (int i = 0; i < m; ++i) {
cin >> arr[i].first >> arr[i].second;
lst[arr[i].first].push_back(i); ans[i] = 1000000000; }
que.push_back({arr[0].first, arr[0].second, 0});
ans[0] = 0; oki[arr[0].first][arr[0].second] = true;
while (que.size()) {
int ps = que.front().ps, pw = que.front().pw, tm = que.front().tm;
que.pop_front();
if (!vis[ps]) {
vis[ps] = true;
for (int x : lst[ps]) {
ans[x] = min(ans[x], tm);
if (!oki[arr[x].first][arr[x].second]) {
oki[arr[x].first][arr[x].second] = true;
que.push_front({arr[x].first, arr[x].second, tm}); } } }
if (ps + pw < n and !oki[ps + pw][pw]) {
oki[ps + pw][pw] = true;
que.push_back({ps + pw, pw, tm + 1}); }
if (ps - pw >= 0 and !oki[ps - pw][pw]) {
oki[ps - pw][pw] = true;
que.push_back({ps - pw, pw, tm + 1}); } }
if (ans[1] == 1000000000) {
ans[1] = -1; }
cout << ans[1];
return 0; }
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1144 KB |
Output is correct |
2 |
Correct |
3 ms |
1144 KB |
Output is correct |
3 |
Correct |
3 ms |
1204 KB |
Output is correct |
4 |
Correct |
3 ms |
1204 KB |
Output is correct |
5 |
Correct |
3 ms |
1348 KB |
Output is correct |
6 |
Correct |
3 ms |
1448 KB |
Output is correct |
7 |
Correct |
3 ms |
1688 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1688 KB |
Output is correct |
2 |
Correct |
3 ms |
1688 KB |
Output is correct |
3 |
Correct |
3 ms |
1688 KB |
Output is correct |
4 |
Correct |
3 ms |
1688 KB |
Output is correct |
5 |
Correct |
3 ms |
1688 KB |
Output is correct |
6 |
Correct |
3 ms |
1688 KB |
Output is correct |
7 |
Correct |
3 ms |
1688 KB |
Output is correct |
8 |
Correct |
2 ms |
1688 KB |
Output is correct |
9 |
Correct |
3 ms |
1772 KB |
Output is correct |
10 |
Correct |
4 ms |
1904 KB |
Output is correct |
11 |
Correct |
4 ms |
1908 KB |
Output is correct |
12 |
Correct |
4 ms |
1920 KB |
Output is correct |
13 |
Correct |
4 ms |
1948 KB |
Output is correct |
14 |
Correct |
4 ms |
2092 KB |
Output is correct |
15 |
Correct |
2 ms |
2104 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
2104 KB |
Output is correct |
2 |
Correct |
3 ms |
2104 KB |
Output is correct |
3 |
Correct |
3 ms |
2104 KB |
Output is correct |
4 |
Correct |
4 ms |
2104 KB |
Output is correct |
5 |
Correct |
3 ms |
2104 KB |
Output is correct |
6 |
Correct |
3 ms |
2104 KB |
Output is correct |
7 |
Correct |
4 ms |
2104 KB |
Output is correct |
8 |
Correct |
3 ms |
2104 KB |
Output is correct |
9 |
Correct |
4 ms |
2104 KB |
Output is correct |
10 |
Correct |
4 ms |
2104 KB |
Output is correct |
11 |
Correct |
5 ms |
2168 KB |
Output is correct |
12 |
Correct |
5 ms |
2168 KB |
Output is correct |
13 |
Correct |
4 ms |
2168 KB |
Output is correct |
14 |
Correct |
5 ms |
2220 KB |
Output is correct |
15 |
Correct |
5 ms |
2220 KB |
Output is correct |
16 |
Correct |
4 ms |
2220 KB |
Output is correct |
17 |
Correct |
10 ms |
4516 KB |
Output is correct |
18 |
Correct |
4 ms |
4516 KB |
Output is correct |
19 |
Correct |
4 ms |
4516 KB |
Output is correct |
20 |
Correct |
14 ms |
9332 KB |
Output is correct |
21 |
Correct |
4 ms |
9332 KB |
Output is correct |
22 |
Correct |
3 ms |
9332 KB |
Output is correct |
23 |
Correct |
12 ms |
9332 KB |
Output is correct |
24 |
Correct |
15 ms |
9332 KB |
Output is correct |
25 |
Correct |
16 ms |
9332 KB |
Output is correct |
26 |
Correct |
15 ms |
9332 KB |
Output is correct |
27 |
Correct |
15 ms |
9332 KB |
Output is correct |
28 |
Correct |
16 ms |
9332 KB |
Output is correct |
29 |
Correct |
16 ms |
9344 KB |
Output is correct |
30 |
Correct |
14 ms |
9344 KB |
Output is correct |
31 |
Correct |
14 ms |
9356 KB |
Output is correct |
32 |
Correct |
16 ms |
9360 KB |
Output is correct |
33 |
Correct |
16 ms |
9364 KB |
Output is correct |
34 |
Correct |
18 ms |
9376 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
9376 KB |
Output is correct |
2 |
Correct |
3 ms |
9376 KB |
Output is correct |
3 |
Correct |
3 ms |
9376 KB |
Output is correct |
4 |
Correct |
3 ms |
9376 KB |
Output is correct |
5 |
Correct |
3 ms |
9376 KB |
Output is correct |
6 |
Correct |
3 ms |
9376 KB |
Output is correct |
7 |
Correct |
3 ms |
9376 KB |
Output is correct |
8 |
Correct |
3 ms |
9376 KB |
Output is correct |
9 |
Correct |
3 ms |
9376 KB |
Output is correct |
10 |
Correct |
2 ms |
9376 KB |
Output is correct |
11 |
Correct |
5 ms |
9376 KB |
Output is correct |
12 |
Correct |
4 ms |
9376 KB |
Output is correct |
13 |
Correct |
4 ms |
9376 KB |
Output is correct |
14 |
Correct |
4 ms |
9376 KB |
Output is correct |
15 |
Correct |
4 ms |
9376 KB |
Output is correct |
16 |
Correct |
3 ms |
9376 KB |
Output is correct |
17 |
Correct |
10 ms |
9376 KB |
Output is correct |
18 |
Correct |
3 ms |
9376 KB |
Output is correct |
19 |
Correct |
3 ms |
9376 KB |
Output is correct |
20 |
Correct |
9 ms |
9524 KB |
Output is correct |
21 |
Correct |
4 ms |
9524 KB |
Output is correct |
22 |
Correct |
3 ms |
9524 KB |
Output is correct |
23 |
Correct |
11 ms |
9524 KB |
Output is correct |
24 |
Correct |
15 ms |
9524 KB |
Output is correct |
25 |
Correct |
15 ms |
9588 KB |
Output is correct |
26 |
Correct |
14 ms |
9608 KB |
Output is correct |
27 |
Correct |
15 ms |
9624 KB |
Output is correct |
28 |
Correct |
16 ms |
9640 KB |
Output is correct |
29 |
Correct |
14 ms |
9660 KB |
Output is correct |
30 |
Correct |
14 ms |
9660 KB |
Output is correct |
31 |
Correct |
14 ms |
9660 KB |
Output is correct |
32 |
Correct |
14 ms |
9664 KB |
Output is correct |
33 |
Correct |
17 ms |
9680 KB |
Output is correct |
34 |
Correct |
17 ms |
9692 KB |
Output is correct |
35 |
Correct |
29 ms |
9692 KB |
Output is correct |
36 |
Correct |
12 ms |
9692 KB |
Output is correct |
37 |
Correct |
30 ms |
10476 KB |
Output is correct |
38 |
Correct |
37 ms |
11148 KB |
Output is correct |
39 |
Correct |
39 ms |
11412 KB |
Output is correct |
40 |
Correct |
38 ms |
11788 KB |
Output is correct |
41 |
Correct |
40 ms |
12040 KB |
Output is correct |
42 |
Correct |
30 ms |
12040 KB |
Output is correct |
43 |
Correct |
30 ms |
12116 KB |
Output is correct |
44 |
Correct |
31 ms |
12300 KB |
Output is correct |
45 |
Correct |
40 ms |
12832 KB |
Output is correct |
46 |
Correct |
40 ms |
13040 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
13040 KB |
Output is correct |
2 |
Correct |
3 ms |
13040 KB |
Output is correct |
3 |
Correct |
3 ms |
13040 KB |
Output is correct |
4 |
Correct |
3 ms |
13040 KB |
Output is correct |
5 |
Correct |
3 ms |
13040 KB |
Output is correct |
6 |
Correct |
3 ms |
13040 KB |
Output is correct |
7 |
Correct |
3 ms |
13040 KB |
Output is correct |
8 |
Correct |
3 ms |
13040 KB |
Output is correct |
9 |
Correct |
3 ms |
13040 KB |
Output is correct |
10 |
Correct |
4 ms |
13040 KB |
Output is correct |
11 |
Correct |
5 ms |
13040 KB |
Output is correct |
12 |
Correct |
5 ms |
13040 KB |
Output is correct |
13 |
Correct |
5 ms |
13040 KB |
Output is correct |
14 |
Correct |
5 ms |
13040 KB |
Output is correct |
15 |
Correct |
5 ms |
13040 KB |
Output is correct |
16 |
Correct |
4 ms |
13040 KB |
Output is correct |
17 |
Correct |
9 ms |
13040 KB |
Output is correct |
18 |
Correct |
4 ms |
13040 KB |
Output is correct |
19 |
Correct |
4 ms |
13040 KB |
Output is correct |
20 |
Correct |
17 ms |
13040 KB |
Output is correct |
21 |
Correct |
4 ms |
13040 KB |
Output is correct |
22 |
Correct |
4 ms |
13040 KB |
Output is correct |
23 |
Correct |
13 ms |
13040 KB |
Output is correct |
24 |
Correct |
16 ms |
13040 KB |
Output is correct |
25 |
Correct |
17 ms |
13040 KB |
Output is correct |
26 |
Correct |
17 ms |
13040 KB |
Output is correct |
27 |
Correct |
16 ms |
13040 KB |
Output is correct |
28 |
Correct |
18 ms |
13040 KB |
Output is correct |
29 |
Correct |
14 ms |
13040 KB |
Output is correct |
30 |
Correct |
14 ms |
13040 KB |
Output is correct |
31 |
Correct |
15 ms |
13040 KB |
Output is correct |
32 |
Correct |
12 ms |
13040 KB |
Output is correct |
33 |
Correct |
17 ms |
13040 KB |
Output is correct |
34 |
Correct |
17 ms |
13040 KB |
Output is correct |
35 |
Correct |
29 ms |
13040 KB |
Output is correct |
36 |
Correct |
12 ms |
13040 KB |
Output is correct |
37 |
Correct |
30 ms |
13420 KB |
Output is correct |
38 |
Correct |
38 ms |
14216 KB |
Output is correct |
39 |
Correct |
37 ms |
14368 KB |
Output is correct |
40 |
Correct |
37 ms |
14760 KB |
Output is correct |
41 |
Correct |
37 ms |
14912 KB |
Output is correct |
42 |
Correct |
29 ms |
14912 KB |
Output is correct |
43 |
Correct |
29 ms |
15052 KB |
Output is correct |
44 |
Correct |
30 ms |
15236 KB |
Output is correct |
45 |
Correct |
41 ms |
15928 KB |
Output is correct |
46 |
Correct |
39 ms |
16012 KB |
Output is correct |
47 |
Correct |
142 ms |
54392 KB |
Output is correct |
48 |
Correct |
22 ms |
54392 KB |
Output is correct |
49 |
Correct |
21 ms |
54392 KB |
Output is correct |
50 |
Correct |
15 ms |
54392 KB |
Output is correct |
51 |
Correct |
224 ms |
120252 KB |
Output is correct |
52 |
Correct |
215 ms |
120488 KB |
Output is correct |
53 |
Correct |
209 ms |
120836 KB |
Output is correct |
54 |
Correct |
96 ms |
120836 KB |
Output is correct |
55 |
Correct |
122 ms |
120836 KB |
Output is correct |
56 |
Correct |
195 ms |
121324 KB |
Output is correct |
57 |
Correct |
210 ms |
121324 KB |
Output is correct |
58 |
Correct |
188 ms |
121324 KB |
Output is correct |
59 |
Correct |
212 ms |
121324 KB |
Output is correct |
60 |
Correct |
211 ms |
121324 KB |
Output is correct |
61 |
Correct |
210 ms |
121604 KB |
Output is correct |
62 |
Correct |
304 ms |
122520 KB |
Output is correct |
63 |
Correct |
385 ms |
122520 KB |
Output is correct |
64 |
Correct |
358 ms |
122532 KB |
Output is correct |
65 |
Correct |
452 ms |
122888 KB |
Output is correct |
66 |
Correct |
582 ms |
123168 KB |
Output is correct |
67 |
Correct |
625 ms |
123452 KB |
Output is correct |