#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 30000;
bitset<MAX_N> doges[MAX_N];
vector<int> scrapers[MAX_N];
int dist[MAX_N];
int doggoB[MAX_N], doggoP[MAX_N];
int dijkstra(int n, int src, int dest) {
priority_queue<pair<int, int>, vector<pair<int, int> >, greater<pair<int, int> > > pq;
memset(dist, 0x3f3f3f3f, sizeof(dist));
dist[src] = 0;
pq.push(make_pair(0, src));
while(!pq.empty()) {
int nod = pq.top().second, distNod = pq.top().first;
pq.pop();
if(distNod == dist[nod]) {
if(nod == dest)
return distNod;
for(auto dog: scrapers[nod]) {
int it = nod - dog, cost = 1;
while(it >= 0) {
if(dist[nod] + cost < dist[it]) {
dist[it] = dist[nod] + cost;
pq.push(make_pair(dist[it], it));
}
if(doges[it][dog])
break;
it -= dog;
++cost;
}
it = nod + dog, cost = 1;
while(it < n) {
if(dist[nod] + cost < dist[it]) {
dist[it] = dist[nod] + cost;
pq.push(make_pair(dist[it], it));
}
if(doges[it][dog])
break;
it += dog;
++cost;
}
}
}
}
return -1;
}
int main() {
int n, m, b, p;
scanf("%d%d", &n, &m);
for(int i = 0; i < m; ++i) {
scanf("%d%d", &b, &p);
doggoB[i] = b;
doggoP[i] = p;
if(!doges[b][p]) {
scrapers[b].push_back(p);
doges[b][p] = true;
}
}
printf("%d", dijkstra(n, doggoB[0], doggoB[1]));
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:59:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &m);
~~~~~^~~~~~~~~~~~~~~~
skyscraper.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &b, &p);
~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1196 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1196 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1228 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1276 KB |
Output is correct |
| 7 |
Correct |
4 ms |
1284 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
1284 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1284 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1308 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1312 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1444 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1444 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1444 KB |
Output is correct |
| 8 |
Correct |
4 ms |
1444 KB |
Output is correct |
| 9 |
Correct |
4 ms |
1516 KB |
Output is correct |
| 10 |
Correct |
4 ms |
1720 KB |
Output is correct |
| 11 |
Correct |
4 ms |
1772 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1772 KB |
Output is correct |
| 13 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 14 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 15 |
Correct |
4 ms |
1800 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1800 KB |
Output is correct |
| 3 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1800 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 11 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 13 |
Correct |
5 ms |
1800 KB |
Output is correct |
| 14 |
Correct |
4 ms |
1800 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1800 KB |
Output is correct |
| 16 |
Correct |
4 ms |
2172 KB |
Output is correct |
| 17 |
Correct |
8 ms |
3984 KB |
Output is correct |
| 18 |
Correct |
6 ms |
4416 KB |
Output is correct |
| 19 |
Correct |
5 ms |
4416 KB |
Output is correct |
| 20 |
Correct |
13 ms |
8828 KB |
Output is correct |
| 21 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 22 |
Correct |
8 ms |
8828 KB |
Output is correct |
| 23 |
Correct |
9 ms |
8828 KB |
Output is correct |
| 24 |
Correct |
12 ms |
8828 KB |
Output is correct |
| 25 |
Correct |
10 ms |
8828 KB |
Output is correct |
| 26 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 27 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 28 |
Correct |
12 ms |
8828 KB |
Output is correct |
| 29 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 30 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 31 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 32 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 33 |
Correct |
7 ms |
8828 KB |
Output is correct |
| 34 |
Correct |
8 ms |
8828 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
8828 KB |
Output is correct |
| 2 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 3 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 4 |
Correct |
3 ms |
8828 KB |
Output is correct |
| 5 |
Correct |
3 ms |
8828 KB |
Output is correct |
| 6 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 7 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 8 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 9 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 10 |
Correct |
3 ms |
8828 KB |
Output is correct |
| 11 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 12 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 13 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 14 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 15 |
Correct |
4 ms |
8828 KB |
Output is correct |
| 16 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 17 |
Correct |
8 ms |
8828 KB |
Output is correct |
| 18 |
Correct |
7 ms |
8828 KB |
Output is correct |
| 19 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 20 |
Correct |
12 ms |
8828 KB |
Output is correct |
| 21 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 22 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 23 |
Correct |
10 ms |
8828 KB |
Output is correct |
| 24 |
Correct |
11 ms |
8828 KB |
Output is correct |
| 25 |
Correct |
11 ms |
8828 KB |
Output is correct |
| 26 |
Correct |
7 ms |
8828 KB |
Output is correct |
| 27 |
Correct |
5 ms |
8828 KB |
Output is correct |
| 28 |
Correct |
13 ms |
8828 KB |
Output is correct |
| 29 |
Correct |
8 ms |
8828 KB |
Output is correct |
| 30 |
Correct |
6 ms |
8828 KB |
Output is correct |
| 31 |
Correct |
7 ms |
8828 KB |
Output is correct |
| 32 |
Correct |
7 ms |
8828 KB |
Output is correct |
| 33 |
Correct |
9 ms |
8828 KB |
Output is correct |
| 34 |
Correct |
8 ms |
8828 KB |
Output is correct |
| 35 |
Correct |
20 ms |
8828 KB |
Output is correct |
| 36 |
Correct |
10 ms |
8828 KB |
Output is correct |
| 37 |
Correct |
20 ms |
8956 KB |
Output is correct |
| 38 |
Correct |
26 ms |
9340 KB |
Output is correct |
| 39 |
Correct |
22 ms |
9340 KB |
Output is correct |
| 40 |
Correct |
23 ms |
9340 KB |
Output is correct |
| 41 |
Correct |
29 ms |
9340 KB |
Output is correct |
| 42 |
Correct |
12 ms |
9340 KB |
Output is correct |
| 43 |
Correct |
17 ms |
9340 KB |
Output is correct |
| 44 |
Correct |
17 ms |
9340 KB |
Output is correct |
| 45 |
Correct |
16 ms |
9340 KB |
Output is correct |
| 46 |
Correct |
15 ms |
9340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 2 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 3 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 4 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 5 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 6 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 7 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 8 |
Correct |
3 ms |
9340 KB |
Output is correct |
| 9 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 10 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 11 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 12 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 13 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 14 |
Correct |
4 ms |
9340 KB |
Output is correct |
| 15 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 16 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 17 |
Correct |
9 ms |
9340 KB |
Output is correct |
| 18 |
Correct |
7 ms |
9340 KB |
Output is correct |
| 19 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 20 |
Correct |
11 ms |
9340 KB |
Output is correct |
| 21 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 22 |
Correct |
6 ms |
9340 KB |
Output is correct |
| 23 |
Correct |
8 ms |
9340 KB |
Output is correct |
| 24 |
Correct |
11 ms |
9340 KB |
Output is correct |
| 25 |
Correct |
9 ms |
9340 KB |
Output is correct |
| 26 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 27 |
Correct |
6 ms |
9340 KB |
Output is correct |
| 28 |
Correct |
15 ms |
9340 KB |
Output is correct |
| 29 |
Correct |
8 ms |
9340 KB |
Output is correct |
| 30 |
Correct |
7 ms |
9340 KB |
Output is correct |
| 31 |
Correct |
8 ms |
9340 KB |
Output is correct |
| 32 |
Correct |
5 ms |
9340 KB |
Output is correct |
| 33 |
Correct |
9 ms |
9340 KB |
Output is correct |
| 34 |
Correct |
7 ms |
9340 KB |
Output is correct |
| 35 |
Correct |
19 ms |
9340 KB |
Output is correct |
| 36 |
Correct |
9 ms |
9340 KB |
Output is correct |
| 37 |
Correct |
24 ms |
9340 KB |
Output is correct |
| 38 |
Correct |
22 ms |
9340 KB |
Output is correct |
| 39 |
Correct |
22 ms |
9340 KB |
Output is correct |
| 40 |
Correct |
21 ms |
9340 KB |
Output is correct |
| 41 |
Correct |
22 ms |
9340 KB |
Output is correct |
| 42 |
Correct |
11 ms |
9340 KB |
Output is correct |
| 43 |
Correct |
11 ms |
9340 KB |
Output is correct |
| 44 |
Correct |
16 ms |
9340 KB |
Output is correct |
| 45 |
Correct |
15 ms |
9340 KB |
Output is correct |
| 46 |
Correct |
16 ms |
9340 KB |
Output is correct |
| 47 |
Correct |
69 ms |
42364 KB |
Output is correct |
| 48 |
Correct |
75 ms |
57724 KB |
Output is correct |
| 49 |
Correct |
79 ms |
57724 KB |
Output is correct |
| 50 |
Correct |
61 ms |
57724 KB |
Output is correct |
| 51 |
Correct |
143 ms |
75736 KB |
Output is correct |
| 52 |
Correct |
139 ms |
76180 KB |
Output is correct |
| 53 |
Correct |
103 ms |
76180 KB |
Output is correct |
| 54 |
Correct |
21 ms |
76180 KB |
Output is correct |
| 55 |
Correct |
26 ms |
76180 KB |
Output is correct |
| 56 |
Correct |
152 ms |
112820 KB |
Output is correct |
| 57 |
Correct |
27 ms |
112820 KB |
Output is correct |
| 58 |
Correct |
39 ms |
112820 KB |
Output is correct |
| 59 |
Correct |
46 ms |
112820 KB |
Output is correct |
| 60 |
Correct |
46 ms |
112820 KB |
Output is correct |
| 61 |
Correct |
38 ms |
112820 KB |
Output is correct |
| 62 |
Correct |
159 ms |
112820 KB |
Output is correct |
| 63 |
Correct |
97 ms |
112820 KB |
Output is correct |
| 64 |
Correct |
114 ms |
112820 KB |
Output is correct |
| 65 |
Correct |
134 ms |
112820 KB |
Output is correct |
| 66 |
Correct |
201 ms |
112820 KB |
Output is correct |
| 67 |
Correct |
179 ms |
112820 KB |
Output is correct |
