#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e18;
vector<vector<pair<int,int>>> adj(30000);
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int t=1,n,k,st,fin;
cin >> n >> k;
pair<int,int> doge[k];
vector<set<int>> doges(n);
vector<int> dist(n);
// memset(dist, 0x3f, sizeof dist);
for (int i = 0; i < k; i++){
cin >> doge[i].first >> doge[i].second;
doges[doge[i].first].insert(doge[i].second);
if (i == 0){
st = doge[i].first;
}
if (i == 1){
fin = doge[i].first;
}
}
sort(doge,doge+k);
for (int i = 0; i < k; i++){
for (int j = doge[i].first+doge[i].second; j < n; j += doge[i].second){
adj[doge[i].first].push_back({j,((j-doge[i].first)/doge[i].second)});
if (doges[j].find(doge[i].second) != doges[j].end()){
break;
}
}
for (int j = doge[i].first-doge[i].second; j >= 0; j -= doge[i].second){
adj[doge[i].first].push_back({j,((doge[i].first-j)/doge[i].second)});
if (doges[j].find(doge[i].second) != doges[j].end()){
break;
}
}
}
for (int i = 0; i < n; i++){
dist[i] = INF;
}
priority_queue<pair<int,int>, vector<pair<int,int>>, greater<pair<int,int>>> pq;
pq.push({0,st});
dist[st] = 0;
while(!pq.empty()){
int distp = pq.top().first;
int p = pq.top().second;
pq.pop();
if (distp != dist[p]){
continue;
}
for (auto ch: adj[p]){
if (dist[p] + ch.second < dist[ch.first]){
dist[ch.first] = dist[p] + ch.second;
pq.push({dist[ch.first],ch.first});
}
}
}
dist[fin] >= INF ? cout << "-1\n" : cout << dist[fin] << "\n";
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:10:9: warning: unused variable 't' [-Wunused-variable]
10 | int t=1,n,k,st,fin;
| ^
skyscraper.cpp:46:12: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized]
46 | dist[st] = 0;
| ^
skyscraper.cpp:61:13: warning: 'fin' may be used uninitialized in this function [-Wmaybe-uninitialized]
61 | dist[fin] >= INF ? cout << "-1\n" : cout << dist[fin] << "\n";
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
956 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
2 ms |
1236 KB |
Output is correct |
12 |
Correct |
6 ms |
5196 KB |
Output is correct |
13 |
Correct |
1 ms |
1108 KB |
Output is correct |
14 |
Correct |
2 ms |
1236 KB |
Output is correct |
15 |
Correct |
1 ms |
1236 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
2 ms |
1236 KB |
Output is correct |
12 |
Correct |
7 ms |
5260 KB |
Output is correct |
13 |
Correct |
1 ms |
1108 KB |
Output is correct |
14 |
Correct |
1 ms |
1236 KB |
Output is correct |
15 |
Correct |
1 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
1108 KB |
Output is correct |
17 |
Correct |
2 ms |
1492 KB |
Output is correct |
18 |
Correct |
1 ms |
1236 KB |
Output is correct |
19 |
Correct |
1 ms |
1236 KB |
Output is correct |
20 |
Correct |
2 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
1108 KB |
Output is correct |
22 |
Correct |
1 ms |
1236 KB |
Output is correct |
23 |
Correct |
2 ms |
1236 KB |
Output is correct |
24 |
Correct |
3 ms |
1492 KB |
Output is correct |
25 |
Correct |
2 ms |
1492 KB |
Output is correct |
26 |
Correct |
99 ms |
67056 KB |
Output is correct |
27 |
Correct |
93 ms |
66908 KB |
Output is correct |
28 |
Correct |
2 ms |
1620 KB |
Output is correct |
29 |
Correct |
4 ms |
2644 KB |
Output is correct |
30 |
Correct |
2 ms |
1620 KB |
Output is correct |
31 |
Correct |
3 ms |
2004 KB |
Output is correct |
32 |
Correct |
2 ms |
1748 KB |
Output is correct |
33 |
Correct |
6 ms |
4048 KB |
Output is correct |
34 |
Correct |
7 ms |
4048 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
2 ms |
1236 KB |
Output is correct |
12 |
Correct |
6 ms |
5248 KB |
Output is correct |
13 |
Correct |
1 ms |
1108 KB |
Output is correct |
14 |
Correct |
2 ms |
1236 KB |
Output is correct |
15 |
Correct |
1 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
1108 KB |
Output is correct |
17 |
Correct |
2 ms |
1492 KB |
Output is correct |
18 |
Correct |
2 ms |
1236 KB |
Output is correct |
19 |
Correct |
1 ms |
1236 KB |
Output is correct |
20 |
Correct |
1 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
1108 KB |
Output is correct |
22 |
Correct |
1 ms |
1236 KB |
Output is correct |
23 |
Correct |
2 ms |
1236 KB |
Output is correct |
24 |
Correct |
2 ms |
1492 KB |
Output is correct |
25 |
Correct |
3 ms |
1492 KB |
Output is correct |
26 |
Correct |
91 ms |
67064 KB |
Output is correct |
27 |
Correct |
90 ms |
66940 KB |
Output is correct |
28 |
Correct |
2 ms |
1620 KB |
Output is correct |
29 |
Correct |
4 ms |
2644 KB |
Output is correct |
30 |
Correct |
2 ms |
1620 KB |
Output is correct |
31 |
Correct |
3 ms |
2004 KB |
Output is correct |
32 |
Correct |
2 ms |
1748 KB |
Output is correct |
33 |
Correct |
8 ms |
4048 KB |
Output is correct |
34 |
Correct |
7 ms |
4048 KB |
Output is correct |
35 |
Correct |
17 ms |
4692 KB |
Output is correct |
36 |
Correct |
3 ms |
1748 KB |
Output is correct |
37 |
Correct |
19 ms |
6436 KB |
Output is correct |
38 |
Correct |
22 ms |
6540 KB |
Output is correct |
39 |
Correct |
22 ms |
6588 KB |
Output is correct |
40 |
Correct |
22 ms |
6616 KB |
Output is correct |
41 |
Correct |
27 ms |
6496 KB |
Output is correct |
42 |
Runtime error |
248 ms |
262144 KB |
Execution killed with signal 9 |
43 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
2 ms |
1236 KB |
Output is correct |
12 |
Correct |
6 ms |
5300 KB |
Output is correct |
13 |
Correct |
1 ms |
1108 KB |
Output is correct |
14 |
Correct |
2 ms |
1236 KB |
Output is correct |
15 |
Correct |
2 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
1108 KB |
Output is correct |
17 |
Correct |
2 ms |
1492 KB |
Output is correct |
18 |
Correct |
1 ms |
1236 KB |
Output is correct |
19 |
Correct |
1 ms |
1236 KB |
Output is correct |
20 |
Correct |
2 ms |
1236 KB |
Output is correct |
21 |
Correct |
1 ms |
1108 KB |
Output is correct |
22 |
Correct |
1 ms |
1236 KB |
Output is correct |
23 |
Correct |
2 ms |
1236 KB |
Output is correct |
24 |
Correct |
2 ms |
1492 KB |
Output is correct |
25 |
Correct |
2 ms |
1492 KB |
Output is correct |
26 |
Correct |
87 ms |
67088 KB |
Output is correct |
27 |
Correct |
83 ms |
67012 KB |
Output is correct |
28 |
Correct |
2 ms |
1620 KB |
Output is correct |
29 |
Correct |
4 ms |
2644 KB |
Output is correct |
30 |
Correct |
2 ms |
1620 KB |
Output is correct |
31 |
Correct |
3 ms |
2004 KB |
Output is correct |
32 |
Correct |
2 ms |
1748 KB |
Output is correct |
33 |
Correct |
6 ms |
4048 KB |
Output is correct |
34 |
Correct |
7 ms |
4048 KB |
Output is correct |
35 |
Correct |
17 ms |
4676 KB |
Output is correct |
36 |
Correct |
3 ms |
1748 KB |
Output is correct |
37 |
Correct |
19 ms |
6484 KB |
Output is correct |
38 |
Correct |
22 ms |
6476 KB |
Output is correct |
39 |
Correct |
22 ms |
6556 KB |
Output is correct |
40 |
Correct |
22 ms |
6468 KB |
Output is correct |
41 |
Correct |
25 ms |
6464 KB |
Output is correct |
42 |
Runtime error |
243 ms |
262144 KB |
Execution killed with signal 9 |
43 |
Halted |
0 ms |
0 KB |
- |