#include<bits/stdc++.h>
#define mx 30009
#define pii pair<int,int>
using namespace std;
int main()
{
int n,m;
cin>>n>>m;
int b[m+1],p[m+1];
int sp[n+1]={};
vector<pii> edg[mx];
map<pair<int,int>,int> mp;
for(int i=0;i<m;i++)
{
cin>>b[i];
cin>>p[i];
sp[b[i]]=p[i];
}
for(int i=0;i<m;i++)
{
int k=0;
for(int j=b[i]+p[i];j<n;j+=p[i])
{
k++;
if(sp[j]!=0 )
edg[b[i]].push_back({j,k});
if(mp[{j,p[i]}])break;
}
k=0;
for(int j=b[i]-p[i];j>=0;j-=p[i])
{
k++;
if(sp[j]!=0)
edg[b[i]].push_back({j,k});
if(mp[{j,p[i]}])break;
}
mp[{b[i],p[i]}]=1;
}
int dist[mx+1];
for(int i=0;i<=mx;i++)dist[i]=(int)2e9;
priority_queue<pii,vector<pii>,greater<pii>> pq;
pq.push({0,b[0]});
dist[b[0]]=0;
int vis[mx+1]={};
while(!pq.empty())
{
int u=pq.top().second;
pq.pop();
if(u==b[1])
{
cout<<dist[u]<<endl;
return 0;
}
if(vis[u])continue;
vis[u]=1;
for(int i=0;i<edg[u].size();i++)
{
if(dist[edg[u][i].first]>dist[u]+edg[u][i].second)
{
dist[edg[u][i].first]=dist[u]+edg[u][i].second;
pq.push({dist[edg[u][i].first],edg[u][i].first});
}
}
}
cout<<-1<<endl;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<edg[u].size();i++)
~^~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
1280 KB |
Output is correct |
2 |
Correct |
2 ms |
1280 KB |
Output is correct |
3 |
Correct |
2 ms |
1280 KB |
Output is correct |
4 |
Correct |
2 ms |
1280 KB |
Output is correct |
5 |
Correct |
2 ms |
1280 KB |
Output is correct |
6 |
Correct |
2 ms |
1280 KB |
Output is correct |
7 |
Correct |
2 ms |
1280 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
1280 KB |
Output is correct |
2 |
Correct |
2 ms |
1280 KB |
Output is correct |
3 |
Correct |
3 ms |
1280 KB |
Output is correct |
4 |
Correct |
3 ms |
1280 KB |
Output is correct |
5 |
Correct |
2 ms |
1280 KB |
Output is correct |
6 |
Correct |
2 ms |
1280 KB |
Output is correct |
7 |
Correct |
2 ms |
1280 KB |
Output is correct |
8 |
Correct |
3 ms |
1280 KB |
Output is correct |
9 |
Correct |
3 ms |
1280 KB |
Output is correct |
10 |
Correct |
3 ms |
1408 KB |
Output is correct |
11 |
Correct |
5 ms |
1664 KB |
Output is correct |
12 |
Correct |
6 ms |
1536 KB |
Output is correct |
13 |
Correct |
4 ms |
1408 KB |
Output is correct |
14 |
Correct |
5 ms |
1664 KB |
Output is correct |
15 |
Correct |
5 ms |
1664 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
1280 KB |
Output is correct |
2 |
Correct |
3 ms |
1280 KB |
Output is correct |
3 |
Correct |
2 ms |
1280 KB |
Output is correct |
4 |
Correct |
2 ms |
1280 KB |
Output is correct |
5 |
Correct |
3 ms |
1280 KB |
Output is correct |
6 |
Correct |
3 ms |
1280 KB |
Output is correct |
7 |
Correct |
3 ms |
1280 KB |
Output is correct |
8 |
Correct |
2 ms |
1280 KB |
Output is correct |
9 |
Correct |
3 ms |
1280 KB |
Output is correct |
10 |
Correct |
3 ms |
1408 KB |
Output is correct |
11 |
Correct |
4 ms |
1536 KB |
Output is correct |
12 |
Correct |
5 ms |
1536 KB |
Output is correct |
13 |
Correct |
4 ms |
1408 KB |
Output is correct |
14 |
Correct |
8 ms |
1664 KB |
Output is correct |
15 |
Correct |
5 ms |
1664 KB |
Output is correct |
16 |
Correct |
5 ms |
1536 KB |
Output is correct |
17 |
Correct |
9 ms |
2432 KB |
Output is correct |
18 |
Correct |
5 ms |
1664 KB |
Output is correct |
19 |
Correct |
4 ms |
1536 KB |
Output is correct |
20 |
Correct |
7 ms |
1732 KB |
Output is correct |
21 |
Correct |
4 ms |
1408 KB |
Output is correct |
22 |
Correct |
4 ms |
1664 KB |
Output is correct |
23 |
Correct |
5 ms |
1792 KB |
Output is correct |
24 |
Correct |
8 ms |
2176 KB |
Output is correct |
25 |
Correct |
6 ms |
1792 KB |
Output is correct |
26 |
Correct |
352 ms |
3860 KB |
Output is correct |
27 |
Correct |
245 ms |
2672 KB |
Output is correct |
28 |
Correct |
11 ms |
2944 KB |
Output is correct |
29 |
Correct |
44 ms |
5112 KB |
Output is correct |
30 |
Correct |
8 ms |
2432 KB |
Output is correct |
31 |
Correct |
15 ms |
3328 KB |
Output is correct |
32 |
Correct |
12 ms |
2816 KB |
Output is correct |
33 |
Correct |
80 ms |
8824 KB |
Output is correct |
34 |
Correct |
85 ms |
8748 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
1280 KB |
Output is correct |
2 |
Correct |
2 ms |
1280 KB |
Output is correct |
3 |
Correct |
3 ms |
1280 KB |
Output is correct |
4 |
Correct |
3 ms |
1280 KB |
Output is correct |
5 |
Correct |
3 ms |
1280 KB |
Output is correct |
6 |
Correct |
3 ms |
1280 KB |
Output is correct |
7 |
Correct |
2 ms |
1280 KB |
Output is correct |
8 |
Correct |
3 ms |
1280 KB |
Output is correct |
9 |
Correct |
2 ms |
1280 KB |
Output is correct |
10 |
Correct |
3 ms |
1408 KB |
Output is correct |
11 |
Correct |
6 ms |
1664 KB |
Output is correct |
12 |
Correct |
7 ms |
1536 KB |
Output is correct |
13 |
Correct |
4 ms |
1408 KB |
Output is correct |
14 |
Correct |
5 ms |
1664 KB |
Output is correct |
15 |
Correct |
5 ms |
1664 KB |
Output is correct |
16 |
Correct |
5 ms |
1536 KB |
Output is correct |
17 |
Correct |
9 ms |
2432 KB |
Output is correct |
18 |
Correct |
5 ms |
1792 KB |
Output is correct |
19 |
Correct |
4 ms |
1664 KB |
Output is correct |
20 |
Correct |
7 ms |
1792 KB |
Output is correct |
21 |
Correct |
3 ms |
1408 KB |
Output is correct |
22 |
Correct |
5 ms |
1664 KB |
Output is correct |
23 |
Correct |
5 ms |
1792 KB |
Output is correct |
24 |
Correct |
8 ms |
2176 KB |
Output is correct |
25 |
Correct |
6 ms |
1792 KB |
Output is correct |
26 |
Correct |
304 ms |
3668 KB |
Output is correct |
27 |
Correct |
232 ms |
2672 KB |
Output is correct |
28 |
Correct |
11 ms |
2940 KB |
Output is correct |
29 |
Correct |
30 ms |
5112 KB |
Output is correct |
30 |
Correct |
8 ms |
2304 KB |
Output is correct |
31 |
Correct |
16 ms |
3328 KB |
Output is correct |
32 |
Correct |
10 ms |
2788 KB |
Output is correct |
33 |
Correct |
75 ms |
8820 KB |
Output is correct |
34 |
Correct |
58 ms |
8824 KB |
Output is correct |
35 |
Correct |
73 ms |
9348 KB |
Output is correct |
36 |
Correct |
11 ms |
2688 KB |
Output is correct |
37 |
Correct |
159 ms |
14840 KB |
Output is correct |
38 |
Correct |
145 ms |
13944 KB |
Output is correct |
39 |
Correct |
132 ms |
13916 KB |
Output is correct |
40 |
Correct |
147 ms |
14004 KB |
Output is correct |
41 |
Correct |
132 ms |
13912 KB |
Output is correct |
42 |
Execution timed out |
1078 ms |
6364 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
1280 KB |
Output is correct |
2 |
Correct |
2 ms |
1280 KB |
Output is correct |
3 |
Correct |
2 ms |
1280 KB |
Output is correct |
4 |
Correct |
3 ms |
1280 KB |
Output is correct |
5 |
Correct |
2 ms |
1280 KB |
Output is correct |
6 |
Correct |
3 ms |
1280 KB |
Output is correct |
7 |
Correct |
3 ms |
1280 KB |
Output is correct |
8 |
Correct |
4 ms |
1280 KB |
Output is correct |
9 |
Correct |
3 ms |
1280 KB |
Output is correct |
10 |
Correct |
4 ms |
1408 KB |
Output is correct |
11 |
Correct |
5 ms |
1664 KB |
Output is correct |
12 |
Correct |
6 ms |
1536 KB |
Output is correct |
13 |
Correct |
4 ms |
1408 KB |
Output is correct |
14 |
Correct |
5 ms |
1664 KB |
Output is correct |
15 |
Correct |
5 ms |
1664 KB |
Output is correct |
16 |
Correct |
4 ms |
1536 KB |
Output is correct |
17 |
Correct |
9 ms |
2432 KB |
Output is correct |
18 |
Correct |
5 ms |
1792 KB |
Output is correct |
19 |
Correct |
4 ms |
1536 KB |
Output is correct |
20 |
Correct |
7 ms |
1792 KB |
Output is correct |
21 |
Correct |
4 ms |
1408 KB |
Output is correct |
22 |
Correct |
4 ms |
1664 KB |
Output is correct |
23 |
Correct |
5 ms |
1792 KB |
Output is correct |
24 |
Correct |
8 ms |
2148 KB |
Output is correct |
25 |
Correct |
7 ms |
1792 KB |
Output is correct |
26 |
Correct |
293 ms |
3792 KB |
Output is correct |
27 |
Correct |
257 ms |
2672 KB |
Output is correct |
28 |
Correct |
11 ms |
2944 KB |
Output is correct |
29 |
Correct |
27 ms |
5112 KB |
Output is correct |
30 |
Correct |
7 ms |
2476 KB |
Output is correct |
31 |
Correct |
16 ms |
3328 KB |
Output is correct |
32 |
Correct |
10 ms |
2688 KB |
Output is correct |
33 |
Correct |
74 ms |
8824 KB |
Output is correct |
34 |
Correct |
72 ms |
8824 KB |
Output is correct |
35 |
Correct |
80 ms |
9376 KB |
Output is correct |
36 |
Correct |
12 ms |
2688 KB |
Output is correct |
37 |
Correct |
143 ms |
14840 KB |
Output is correct |
38 |
Correct |
162 ms |
13944 KB |
Output is correct |
39 |
Correct |
162 ms |
13944 KB |
Output is correct |
40 |
Correct |
131 ms |
13916 KB |
Output is correct |
41 |
Correct |
139 ms |
13916 KB |
Output is correct |
42 |
Execution timed out |
1054 ms |
6256 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |