#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;
int dist[n][m];
for(int i = 0; i < n; i ++)
for(int j = 0; j < m ; j++)
dist[i][j] = 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();
// 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});
}
}
if(dist[b[1]][1] == inf)
cout << -1 << endl;
else
cout << dist[b[1]][1] << endl;
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:28:7: warning: unused variable 'cnt' [-Wunused-variable]
28 | int cnt[n] = {};
| ^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
344 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 |
1 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 |
3 ms |
1116 KB |
Output is correct |
13 |
Correct |
3 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1372 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 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 |
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 |
400 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 |
1264 KB |
Output is correct |
12 |
Correct |
3 ms |
1116 KB |
Output is correct |
13 |
Correct |
3 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 |
5 ms |
5468 KB |
Output is correct |
18 |
Correct |
7 ms |
7168 KB |
Output is correct |
19 |
Correct |
3 ms |
4700 KB |
Output is correct |
20 |
Correct |
111 ms |
16256 KB |
Output is correct |
21 |
Correct |
2 ms |
2140 KB |
Output is correct |
22 |
Correct |
5 ms |
5468 KB |
Output is correct |
23 |
Correct |
4 ms |
6488 KB |
Output is correct |
24 |
Correct |
16 ms |
14500 KB |
Output is correct |
25 |
Correct |
12 ms |
16220 KB |
Output is correct |
26 |
Correct |
45 ms |
16216 KB |
Output is correct |
27 |
Correct |
44 ms |
16220 KB |
Output is correct |
28 |
Correct |
11 ms |
16220 KB |
Output is correct |
29 |
Correct |
5 ms |
6232 KB |
Output is correct |
30 |
Correct |
2 ms |
1884 KB |
Output is correct |
31 |
Correct |
4 ms |
4956 KB |
Output is correct |
32 |
Correct |
3 ms |
4188 KB |
Output is correct |
33 |
Correct |
14 ms |
16156 KB |
Output is correct |
34 |
Correct |
16 ms |
16224 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 |
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 |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
3 ms |
1116 KB |
Output is correct |
13 |
Correct |
3 ms |
1320 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 |
5 ms |
5464 KB |
Output is correct |
18 |
Correct |
4 ms |
7260 KB |
Output is correct |
19 |
Correct |
3 ms |
4700 KB |
Output is correct |
20 |
Correct |
89 ms |
16264 KB |
Output is correct |
21 |
Correct |
2 ms |
2392 KB |
Output is correct |
22 |
Correct |
3 ms |
5468 KB |
Output is correct |
23 |
Correct |
4 ms |
6492 KB |
Output is correct |
24 |
Correct |
9 ms |
14428 KB |
Output is correct |
25 |
Correct |
10 ms |
16128 KB |
Output is correct |
26 |
Correct |
56 ms |
16220 KB |
Output is correct |
27 |
Correct |
43 ms |
16220 KB |
Output is correct |
28 |
Correct |
11 ms |
16220 KB |
Output is correct |
29 |
Correct |
5 ms |
6268 KB |
Output is correct |
30 |
Correct |
2 ms |
1884 KB |
Output is correct |
31 |
Correct |
4 ms |
4956 KB |
Output is correct |
32 |
Correct |
3 ms |
4188 KB |
Output is correct |
33 |
Correct |
12 ms |
16216 KB |
Output is correct |
34 |
Correct |
13 ms |
16216 KB |
Output is correct |
35 |
Correct |
95 ms |
145492 KB |
Output is correct |
36 |
Correct |
13 ms |
20632 KB |
Output is correct |
37 |
Correct |
115 ms |
148316 KB |
Output is correct |
38 |
Correct |
150 ms |
235856 KB |
Output is correct |
39 |
Correct |
154 ms |
236116 KB |
Output is correct |
40 |
Correct |
156 ms |
236116 KB |
Output is correct |
41 |
Correct |
151 ms |
236024 KB |
Output is correct |
42 |
Correct |
743 ms |
236320 KB |
Output is correct |
43 |
Correct |
672 ms |
236188 KB |
Output is correct |
44 |
Correct |
876 ms |
236372 KB |
Output is correct |
45 |
Correct |
169 ms |
236112 KB |
Output is correct |
46 |
Correct |
179 ms |
236104 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 |
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 |
3 ms |
1116 KB |
Output is correct |
13 |
Correct |
3 ms |
1116 KB |
Output is correct |
14 |
Correct |
2 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 |
4 ms |
5588 KB |
Output is correct |
18 |
Correct |
4 ms |
7260 KB |
Output is correct |
19 |
Correct |
3 ms |
4700 KB |
Output is correct |
20 |
Correct |
91 ms |
16252 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 |
10 ms |
14428 KB |
Output is correct |
25 |
Correct |
14 ms |
16024 KB |
Output is correct |
26 |
Correct |
44 ms |
16216 KB |
Output is correct |
27 |
Correct |
44 ms |
16220 KB |
Output is correct |
28 |
Correct |
13 ms |
16216 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 |
4956 KB |
Output is correct |
32 |
Correct |
3 ms |
4188 KB |
Output is correct |
33 |
Correct |
16 ms |
16220 KB |
Output is correct |
34 |
Correct |
13 ms |
16108 KB |
Output is correct |
35 |
Correct |
96 ms |
145608 KB |
Output is correct |
36 |
Correct |
14 ms |
20572 KB |
Output is correct |
37 |
Correct |
106 ms |
148144 KB |
Output is correct |
38 |
Correct |
137 ms |
235684 KB |
Output is correct |
39 |
Correct |
153 ms |
236256 KB |
Output is correct |
40 |
Correct |
148 ms |
236140 KB |
Output is correct |
41 |
Correct |
146 ms |
236032 KB |
Output is correct |
42 |
Correct |
759 ms |
236624 KB |
Output is correct |
43 |
Correct |
693 ms |
236372 KB |
Output is correct |
44 |
Correct |
918 ms |
236440 KB |
Output is correct |
45 |
Correct |
210 ms |
236112 KB |
Output is correct |
46 |
Correct |
160 ms |
236112 KB |
Output is correct |
47 |
Runtime error |
126 ms |
262144 KB |
Execution killed with signal 9 |
48 |
Halted |
0 ms |
0 KB |
- |