#include<stdio.h>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
const int MAX_N = 30000, RTN = 200;
int n, m, dist[MAX_N], s, e;
bool ck[MAX_N][RTN], fvis[MAX_N];
struct st{
int b, p, w;
st(int _b, int _p, int _w)
:b(_b), p(_p), w(_w){}
};
vector<int> adj[MAX_N];
queue<st> q;
int main(){
scanf("%d %d", &n, &m);
for (int i = 0; i < m; i++){
int a, b;
scanf("%d %d", &a, &b);
adj[a].push_back(b);
if (i == 0) s = a;
if (i == 1) e = a;
}
dist[e] = -1;
q.push(st(s, 0, 0));
while (!q.empty()){
st h = q.front();
q.pop();
if (h.b < 0 || h.b >= n) continue;
if (abs(h.p) < RTN){
if (ck[h.b][abs(h.p)]) continue;
ck[h.b][abs(h.p)] = true;
}
if (!fvis[h.b]){
fvis[h.b] = true;
dist[h.b] = h.w;
for (auto t : adj[h.b]){
q.push(st(h.b + t, t, h.w + 1));
q.push(st(h.b - t, -t, h.w + 1));
}
}
q.push(st(h.b + h.p, h.p, h.w + 1));
}
printf("%d", dist[e]);
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
17 | scanf("%d %d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
20 | scanf("%d %d", &a, &b);
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1024 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1060 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1056 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1152 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1280 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1408 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 33 |
Correct |
4 ms |
1536 KB |
Output is correct |
| 34 |
Correct |
4 ms |
1460 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1280 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1024 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1408 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1536 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 28 |
Correct |
4 ms |
1536 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 33 |
Correct |
4 ms |
1536 KB |
Output is correct |
| 34 |
Correct |
4 ms |
1536 KB |
Output is correct |
| 35 |
Correct |
12 ms |
2280 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1408 KB |
Output is correct |
| 37 |
Correct |
11 ms |
2176 KB |
Output is correct |
| 38 |
Correct |
14 ms |
2560 KB |
Output is correct |
| 39 |
Correct |
14 ms |
2560 KB |
Output is correct |
| 40 |
Correct |
14 ms |
2560 KB |
Output is correct |
| 41 |
Correct |
14 ms |
2560 KB |
Output is correct |
| 42 |
Correct |
8 ms |
2432 KB |
Output is correct |
| 43 |
Correct |
8 ms |
2432 KB |
Output is correct |
| 44 |
Correct |
8 ms |
2432 KB |
Output is correct |
| 45 |
Correct |
17 ms |
2424 KB |
Output is correct |
| 46 |
Correct |
17 ms |
2424 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1152 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1152 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1280 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1024 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1408 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1536 KB |
Output is correct |
| 34 |
Correct |
4 ms |
1536 KB |
Output is correct |
| 35 |
Correct |
11 ms |
2176 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1408 KB |
Output is correct |
| 37 |
Correct |
10 ms |
2176 KB |
Output is correct |
| 38 |
Correct |
14 ms |
2620 KB |
Output is correct |
| 39 |
Correct |
17 ms |
2560 KB |
Output is correct |
| 40 |
Correct |
14 ms |
2560 KB |
Output is correct |
| 41 |
Correct |
15 ms |
2560 KB |
Output is correct |
| 42 |
Correct |
9 ms |
2432 KB |
Output is correct |
| 43 |
Correct |
10 ms |
2432 KB |
Output is correct |
| 44 |
Correct |
9 ms |
2432 KB |
Output is correct |
| 45 |
Correct |
18 ms |
2424 KB |
Output is correct |
| 46 |
Correct |
23 ms |
2416 KB |
Output is correct |
| 47 |
Correct |
26 ms |
4608 KB |
Output is correct |
| 48 |
Correct |
12 ms |
1792 KB |
Output is correct |
| 49 |
Correct |
9 ms |
1664 KB |
Output is correct |
| 50 |
Correct |
7 ms |
1536 KB |
Output is correct |
| 51 |
Correct |
29 ms |
8064 KB |
Output is correct |
| 52 |
Correct |
30 ms |
8056 KB |
Output is correct |
| 53 |
Correct |
20 ms |
7936 KB |
Output is correct |
| 54 |
Correct |
5 ms |
7040 KB |
Output is correct |
| 55 |
Correct |
6 ms |
7040 KB |
Output is correct |
| 56 |
Correct |
17 ms |
8168 KB |
Output is correct |
| 57 |
Correct |
19 ms |
7288 KB |
Output is correct |
| 58 |
Correct |
13 ms |
7936 KB |
Output is correct |
| 59 |
Correct |
18 ms |
8064 KB |
Output is correct |
| 60 |
Correct |
19 ms |
8064 KB |
Output is correct |
| 61 |
Correct |
16 ms |
8064 KB |
Output is correct |
| 62 |
Correct |
33 ms |
8312 KB |
Output is correct |
| 63 |
Correct |
43 ms |
7672 KB |
Output is correct |
| 64 |
Correct |
55 ms |
7632 KB |
Output is correct |
| 65 |
Correct |
120 ms |
7796 KB |
Output is correct |
| 66 |
Correct |
202 ms |
7984 KB |
Output is correct |
| 67 |
Correct |
165 ms |
8036 KB |
Output is correct |
