#include<bits/stdc++.h>
using namespace std;
const int inf = 1e9;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
int n, m;
cin >> n >> m;
vector<vector<int> > dist(n, vector<int> (m, inf));
vector<int> L[n];
int p[m], b[m];
for(int i = 0; i < m; i ++)
{
cin >> b[i] >> p[i];
L[b[i]].push_back(i);
}
int cnt[n] = {};
deque<pair<int,int> > Q;
Q.push_back({b[0], 0});
dist[b[0]][0] = 0;
while(Q.size())
{
int f = Q.front().first, s = Q.front().second;
Q.pop_front();
if(f == b[1])
{
cout << dist[f][s] << endl;
exit(0);
}
// cerr << f << ' ' << s << ' ' << dist[f][s] << endl;
// if(cnt[f] <= 2000) {
for(int res : L[f])
if(dist[f][s] < dist[f][res])
{
dist[f][res] = dist[f][s];
Q.push_front({f, res});
}
// cnt[f]++;
// }
L[f].clear();
if(f + p[s] < n && dist[f][s] + 1 < dist[f + p[s]][s])
{
dist[f + p[s]][s] = dist[f][s] + 1;
Q.push_back({f + p[s], s});
}
if(f - p[s] >= 0 && dist[f][s] + 1 < dist[f - p[s]][s])
{
dist[f - p[s]][s] = dist[f][s] + 1;
Q.push_back({f - p[s], s});
}
}
cout << -1 << endl;
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:25:7: warning: unused variable 'cnt' [-Wunused-variable]
25 | int cnt[n] = {};
| ^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
344 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1116 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
412 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1112 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
3 ms |
5468 KB |
Output is correct |
18 |
Correct |
3 ms |
7152 KB |
Output is correct |
19 |
Correct |
2 ms |
4700 KB |
Output is correct |
20 |
Correct |
83 ms |
16324 KB |
Output is correct |
21 |
Correct |
1 ms |
2136 KB |
Output is correct |
22 |
Correct |
2 ms |
5468 KB |
Output is correct |
23 |
Correct |
3 ms |
6492 KB |
Output is correct |
24 |
Correct |
6 ms |
14684 KB |
Output is correct |
25 |
Correct |
8 ms |
16220 KB |
Output is correct |
26 |
Correct |
6 ms |
16220 KB |
Output is correct |
27 |
Correct |
7 ms |
16252 KB |
Output is correct |
28 |
Correct |
11 ms |
16220 KB |
Output is correct |
29 |
Correct |
4 ms |
6432 KB |
Output is correct |
30 |
Correct |
1 ms |
1884 KB |
Output is correct |
31 |
Correct |
6 ms |
4956 KB |
Output is correct |
32 |
Correct |
4 ms |
4384 KB |
Output is correct |
33 |
Correct |
18 ms |
16220 KB |
Output is correct |
34 |
Correct |
14 ms |
16292 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
2 ms |
1276 KB |
Output is correct |
14 |
Correct |
1 ms |
1112 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
3 ms |
5672 KB |
Output is correct |
18 |
Correct |
3 ms |
7260 KB |
Output is correct |
19 |
Correct |
2 ms |
4952 KB |
Output is correct |
20 |
Correct |
93 ms |
16328 KB |
Output is correct |
21 |
Correct |
1 ms |
2140 KB |
Output is correct |
22 |
Correct |
2 ms |
5540 KB |
Output is correct |
23 |
Correct |
3 ms |
6492 KB |
Output is correct |
24 |
Correct |
6 ms |
14424 KB |
Output is correct |
25 |
Correct |
6 ms |
16216 KB |
Output is correct |
26 |
Correct |
7 ms |
16220 KB |
Output is correct |
27 |
Correct |
7 ms |
16220 KB |
Output is correct |
28 |
Correct |
7 ms |
16184 KB |
Output is correct |
29 |
Correct |
6 ms |
6236 KB |
Output is correct |
30 |
Correct |
1 ms |
1884 KB |
Output is correct |
31 |
Correct |
4 ms |
4956 KB |
Output is correct |
32 |
Correct |
4 ms |
4188 KB |
Output is correct |
33 |
Correct |
12 ms |
16216 KB |
Output is correct |
34 |
Correct |
10 ms |
16288 KB |
Output is correct |
35 |
Correct |
68 ms |
145444 KB |
Output is correct |
36 |
Correct |
8 ms |
20568 KB |
Output is correct |
37 |
Correct |
59 ms |
147796 KB |
Output is correct |
38 |
Correct |
143 ms |
235564 KB |
Output is correct |
39 |
Correct |
95 ms |
235712 KB |
Output is correct |
40 |
Correct |
102 ms |
235856 KB |
Output is correct |
41 |
Correct |
95 ms |
235648 KB |
Output is correct |
42 |
Correct |
96 ms |
235860 KB |
Output is correct |
43 |
Correct |
104 ms |
235792 KB |
Output is correct |
44 |
Correct |
339 ms |
236116 KB |
Output is correct |
45 |
Correct |
142 ms |
235872 KB |
Output is correct |
46 |
Correct |
123 ms |
235860 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1116 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
3 ms |
5684 KB |
Output is correct |
18 |
Correct |
4 ms |
7260 KB |
Output is correct |
19 |
Correct |
3 ms |
4956 KB |
Output is correct |
20 |
Correct |
93 ms |
16332 KB |
Output is correct |
21 |
Correct |
1 ms |
2140 KB |
Output is correct |
22 |
Correct |
3 ms |
5468 KB |
Output is correct |
23 |
Correct |
4 ms |
6492 KB |
Output is correct |
24 |
Correct |
6 ms |
14564 KB |
Output is correct |
25 |
Correct |
7 ms |
16220 KB |
Output is correct |
26 |
Correct |
6 ms |
16196 KB |
Output is correct |
27 |
Correct |
7 ms |
16216 KB |
Output is correct |
28 |
Correct |
8 ms |
16220 KB |
Output is correct |
29 |
Correct |
6 ms |
6236 KB |
Output is correct |
30 |
Correct |
2 ms |
1884 KB |
Output is correct |
31 |
Correct |
4 ms |
5208 KB |
Output is correct |
32 |
Correct |
5 ms |
4188 KB |
Output is correct |
33 |
Correct |
15 ms |
16220 KB |
Output is correct |
34 |
Correct |
15 ms |
16220 KB |
Output is correct |
35 |
Correct |
77 ms |
145356 KB |
Output is correct |
36 |
Correct |
11 ms |
20824 KB |
Output is correct |
37 |
Correct |
61 ms |
147792 KB |
Output is correct |
38 |
Correct |
98 ms |
235408 KB |
Output is correct |
39 |
Correct |
104 ms |
235860 KB |
Output is correct |
40 |
Correct |
92 ms |
235856 KB |
Output is correct |
41 |
Correct |
94 ms |
235600 KB |
Output is correct |
42 |
Correct |
94 ms |
235856 KB |
Output is correct |
43 |
Correct |
96 ms |
235692 KB |
Output is correct |
44 |
Correct |
318 ms |
236112 KB |
Output is correct |
45 |
Correct |
142 ms |
235860 KB |
Output is correct |
46 |
Correct |
123 ms |
236112 KB |
Output is correct |
47 |
Runtime error |
130 ms |
262144 KB |
Execution killed with signal 9 |
48 |
Halted |
0 ms |
0 KB |
- |