#include <bits/stdc++.h>
#define maxn 30005
#define pii pair<int,int>
#define f first
#define s second
using namespace std;
int n,m;
pii dg[maxn];
pii sdg[maxn];
vector<int>p[maxn];
vector<pii>adj[maxn];
priority_queue<pii>pq;
int dis[maxn];
bool bio[maxn];
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin>>n>>m;
int s;
int e;
for(int i=0;i<m;i++)
{
int x,y;
cin>>x>>y;
sdg[i].f=y;
sdg[i].s=x;
if(i==0)s=x;
if(i==1)e=x;
}
sort(sdg,sdg+m);
int br=0;
for(int i=0;i<m;i++)
{
if(i==0 || sdg[i]!=sdg[i-1])
{
dg[br].f=sdg[i].s;
dg[br].s=sdg[i].f;
br++;
}
}
m=br;
for(int i=0;i<m;i++)p[dg[i].s].push_back(dg[i].f);
for(int i=1;i<n;i++)sort(p[i].begin(),p[i].end());
for(int i=0;i<m;i++)
{
int pp=0;
int sz=p[dg[i].s].size();
while(p[dg[i].s][pp]!=dg[i].f)pp++;
int up=pp+1;
for(int j=dg[i].f+dg[i].s;j<n;j+=dg[i].s)
{
while(up<sz && p[dg[i].s][up]<j)up++;
adj[dg[i].f].push_back({j,(j-dg[i].f)/dg[i].s});
if(up<sz && p[dg[i].s][up]==j)break;
}
pp--;
for(int j=dg[i].f-dg[i].s;j>=0;j-=dg[i].s)
{
while(pp>=0 && p[dg[i].s][pp]>j)pp--;
adj[dg[i].f].push_back({j,(dg[i].f-j)/dg[i].s});
if(pp>=0 && p[dg[i].s][pp]==j)break;
}
}
/*for(int i=0;i<n;i++)
{
cout<<i<<" ";
for(auto x:adj[i])cout<<x.f<<","<<x.s<<" ";
cout<<endl;
}*/
if(e==s)
{
cout<<"0"<<endl;
return 0;
}
for(int i=0;i<n;i++)
{
dis[i]=maxn*maxn+55;
bio[i]=false;
}
pq.push({0,s});
dis[s]=0;
while(!pq.empty())
{
int v=pq.top().second;
pq.pop();
if(v==e)
{
cout<<dis[e]<<endl;
return 0;
}
if(bio[v])continue;
bio[v]=true;
for(auto x:adj[v])
{
int u=x.f;
int w=x.s;
if(dis[u]>dis[v]+w)
{
dis[u]=dis[v]+w;
pq.push({-dis[u],u});
}
}
}
cout<<"-1"<<endl;
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:98:8: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
if(v==e)
^~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1784 KB |
Output is correct |
2 |
Correct |
3 ms |
1788 KB |
Output is correct |
3 |
Correct |
3 ms |
1832 KB |
Output is correct |
4 |
Correct |
3 ms |
1848 KB |
Output is correct |
5 |
Correct |
3 ms |
2020 KB |
Output is correct |
6 |
Correct |
3 ms |
2020 KB |
Output is correct |
7 |
Correct |
3 ms |
2064 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
2064 KB |
Output is correct |
2 |
Correct |
3 ms |
2064 KB |
Output is correct |
3 |
Correct |
3 ms |
2144 KB |
Output is correct |
4 |
Correct |
3 ms |
2144 KB |
Output is correct |
5 |
Correct |
3 ms |
2144 KB |
Output is correct |
6 |
Correct |
4 ms |
2144 KB |
Output is correct |
7 |
Correct |
4 ms |
2144 KB |
Output is correct |
8 |
Correct |
3 ms |
2144 KB |
Output is correct |
9 |
Correct |
3 ms |
2144 KB |
Output is correct |
10 |
Correct |
4 ms |
2144 KB |
Output is correct |
11 |
Correct |
5 ms |
2144 KB |
Output is correct |
12 |
Correct |
3 ms |
2144 KB |
Output is correct |
13 |
Correct |
3 ms |
2144 KB |
Output is correct |
14 |
Correct |
4 ms |
2220 KB |
Output is correct |
15 |
Correct |
4 ms |
2232 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
2232 KB |
Output is correct |
2 |
Correct |
3 ms |
2232 KB |
Output is correct |
3 |
Correct |
3 ms |
2232 KB |
Output is correct |
4 |
Correct |
3 ms |
2232 KB |
Output is correct |
5 |
Correct |
3 ms |
2232 KB |
Output is correct |
6 |
Correct |
3 ms |
2232 KB |
Output is correct |
7 |
Correct |
3 ms |
2232 KB |
Output is correct |
8 |
Correct |
3 ms |
2232 KB |
Output is correct |
9 |
Correct |
3 ms |
2232 KB |
Output is correct |
10 |
Correct |
3 ms |
2232 KB |
Output is correct |
11 |
Correct |
4 ms |
2232 KB |
Output is correct |
12 |
Correct |
4 ms |
2232 KB |
Output is correct |
13 |
Correct |
4 ms |
2232 KB |
Output is correct |
14 |
Correct |
8 ms |
2292 KB |
Output is correct |
15 |
Correct |
4 ms |
2304 KB |
Output is correct |
16 |
Correct |
4 ms |
2304 KB |
Output is correct |
17 |
Correct |
5 ms |
2452 KB |
Output is correct |
18 |
Correct |
4 ms |
2452 KB |
Output is correct |
19 |
Correct |
4 ms |
2452 KB |
Output is correct |
20 |
Correct |
5 ms |
2452 KB |
Output is correct |
21 |
Correct |
4 ms |
2452 KB |
Output is correct |
22 |
Correct |
3 ms |
2452 KB |
Output is correct |
23 |
Correct |
4 ms |
2452 KB |
Output is correct |
24 |
Correct |
4 ms |
2536 KB |
Output is correct |
25 |
Correct |
5 ms |
2536 KB |
Output is correct |
26 |
Correct |
4 ms |
2536 KB |
Output is correct |
27 |
Correct |
4 ms |
2536 KB |
Output is correct |
28 |
Correct |
5 ms |
2608 KB |
Output is correct |
29 |
Correct |
6 ms |
3140 KB |
Output is correct |
30 |
Correct |
4 ms |
3140 KB |
Output is correct |
31 |
Correct |
5 ms |
3140 KB |
Output is correct |
32 |
Correct |
5 ms |
3140 KB |
Output is correct |
33 |
Correct |
10 ms |
3800 KB |
Output is correct |
34 |
Correct |
8 ms |
3880 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
3880 KB |
Output is correct |
2 |
Correct |
3 ms |
3880 KB |
Output is correct |
3 |
Correct |
3 ms |
3880 KB |
Output is correct |
4 |
Correct |
3 ms |
3880 KB |
Output is correct |
5 |
Correct |
3 ms |
3880 KB |
Output is correct |
6 |
Correct |
3 ms |
3880 KB |
Output is correct |
7 |
Correct |
3 ms |
3880 KB |
Output is correct |
8 |
Correct |
3 ms |
3880 KB |
Output is correct |
9 |
Correct |
3 ms |
3880 KB |
Output is correct |
10 |
Correct |
3 ms |
3880 KB |
Output is correct |
11 |
Correct |
4 ms |
3880 KB |
Output is correct |
12 |
Correct |
3 ms |
3880 KB |
Output is correct |
13 |
Correct |
4 ms |
3880 KB |
Output is correct |
14 |
Correct |
4 ms |
3880 KB |
Output is correct |
15 |
Correct |
4 ms |
3880 KB |
Output is correct |
16 |
Correct |
3 ms |
3880 KB |
Output is correct |
17 |
Correct |
4 ms |
3880 KB |
Output is correct |
18 |
Correct |
4 ms |
3880 KB |
Output is correct |
19 |
Correct |
4 ms |
3880 KB |
Output is correct |
20 |
Correct |
5 ms |
3880 KB |
Output is correct |
21 |
Correct |
4 ms |
3880 KB |
Output is correct |
22 |
Correct |
4 ms |
3880 KB |
Output is correct |
23 |
Correct |
4 ms |
3880 KB |
Output is correct |
24 |
Correct |
5 ms |
3880 KB |
Output is correct |
25 |
Correct |
5 ms |
3880 KB |
Output is correct |
26 |
Correct |
4 ms |
3880 KB |
Output is correct |
27 |
Correct |
4 ms |
3880 KB |
Output is correct |
28 |
Correct |
5 ms |
3880 KB |
Output is correct |
29 |
Correct |
8 ms |
3880 KB |
Output is correct |
30 |
Correct |
4 ms |
3880 KB |
Output is correct |
31 |
Correct |
5 ms |
3880 KB |
Output is correct |
32 |
Correct |
4 ms |
3880 KB |
Output is correct |
33 |
Correct |
8 ms |
4104 KB |
Output is correct |
34 |
Correct |
7 ms |
4112 KB |
Output is correct |
35 |
Correct |
15 ms |
4508 KB |
Output is correct |
36 |
Correct |
5 ms |
4508 KB |
Output is correct |
37 |
Correct |
17 ms |
5664 KB |
Output is correct |
38 |
Correct |
19 ms |
5824 KB |
Output is correct |
39 |
Correct |
20 ms |
6088 KB |
Output is correct |
40 |
Correct |
20 ms |
6320 KB |
Output is correct |
41 |
Correct |
20 ms |
6632 KB |
Output is correct |
42 |
Correct |
12 ms |
6632 KB |
Output is correct |
43 |
Correct |
9 ms |
6632 KB |
Output is correct |
44 |
Correct |
11 ms |
6632 KB |
Output is correct |
45 |
Correct |
29 ms |
10204 KB |
Output is correct |
46 |
Correct |
27 ms |
10288 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
10288 KB |
Output is correct |
2 |
Correct |
3 ms |
10288 KB |
Output is correct |
3 |
Correct |
3 ms |
10288 KB |
Output is correct |
4 |
Correct |
3 ms |
10288 KB |
Output is correct |
5 |
Correct |
3 ms |
10288 KB |
Output is correct |
6 |
Correct |
3 ms |
10288 KB |
Output is correct |
7 |
Correct |
3 ms |
10288 KB |
Output is correct |
8 |
Correct |
3 ms |
10288 KB |
Output is correct |
9 |
Correct |
3 ms |
10288 KB |
Output is correct |
10 |
Correct |
3 ms |
10288 KB |
Output is correct |
11 |
Correct |
5 ms |
10288 KB |
Output is correct |
12 |
Correct |
3 ms |
10288 KB |
Output is correct |
13 |
Correct |
3 ms |
10288 KB |
Output is correct |
14 |
Correct |
4 ms |
10288 KB |
Output is correct |
15 |
Correct |
4 ms |
10288 KB |
Output is correct |
16 |
Correct |
4 ms |
10288 KB |
Output is correct |
17 |
Correct |
5 ms |
10288 KB |
Output is correct |
18 |
Correct |
4 ms |
10288 KB |
Output is correct |
19 |
Correct |
4 ms |
10288 KB |
Output is correct |
20 |
Correct |
5 ms |
10288 KB |
Output is correct |
21 |
Correct |
4 ms |
10288 KB |
Output is correct |
22 |
Correct |
3 ms |
10288 KB |
Output is correct |
23 |
Correct |
4 ms |
10288 KB |
Output is correct |
24 |
Correct |
5 ms |
10288 KB |
Output is correct |
25 |
Correct |
4 ms |
10288 KB |
Output is correct |
26 |
Correct |
4 ms |
10288 KB |
Output is correct |
27 |
Correct |
4 ms |
10288 KB |
Output is correct |
28 |
Correct |
5 ms |
10288 KB |
Output is correct |
29 |
Correct |
6 ms |
10288 KB |
Output is correct |
30 |
Correct |
4 ms |
10288 KB |
Output is correct |
31 |
Correct |
5 ms |
10288 KB |
Output is correct |
32 |
Correct |
10 ms |
10288 KB |
Output is correct |
33 |
Correct |
8 ms |
10288 KB |
Output is correct |
34 |
Correct |
7 ms |
10288 KB |
Output is correct |
35 |
Correct |
17 ms |
10288 KB |
Output is correct |
36 |
Correct |
5 ms |
10288 KB |
Output is correct |
37 |
Correct |
17 ms |
10288 KB |
Output is correct |
38 |
Correct |
21 ms |
10288 KB |
Output is correct |
39 |
Correct |
20 ms |
10288 KB |
Output is correct |
40 |
Correct |
20 ms |
10288 KB |
Output is correct |
41 |
Correct |
19 ms |
10288 KB |
Output is correct |
42 |
Correct |
9 ms |
10288 KB |
Output is correct |
43 |
Correct |
11 ms |
10288 KB |
Output is correct |
44 |
Correct |
11 ms |
10288 KB |
Output is correct |
45 |
Correct |
29 ms |
13008 KB |
Output is correct |
46 |
Correct |
28 ms |
13220 KB |
Output is correct |
47 |
Correct |
44 ms |
17780 KB |
Output is correct |
48 |
Correct |
20 ms |
17780 KB |
Output is correct |
49 |
Correct |
17 ms |
17780 KB |
Output is correct |
50 |
Correct |
14 ms |
17780 KB |
Output is correct |
51 |
Correct |
35 ms |
17780 KB |
Output is correct |
52 |
Correct |
35 ms |
17780 KB |
Output is correct |
53 |
Correct |
17 ms |
17780 KB |
Output is correct |
54 |
Correct |
6 ms |
17780 KB |
Output is correct |
55 |
Correct |
7 ms |
17780 KB |
Output is correct |
56 |
Correct |
223 ms |
17780 KB |
Output is correct |
57 |
Correct |
23 ms |
19120 KB |
Output is correct |
58 |
Correct |
12 ms |
19120 KB |
Output is correct |
59 |
Correct |
13 ms |
19120 KB |
Output is correct |
60 |
Correct |
15 ms |
19120 KB |
Output is correct |
61 |
Correct |
15 ms |
19120 KB |
Output is correct |
62 |
Correct |
82 ms |
19120 KB |
Output is correct |
63 |
Correct |
83 ms |
34868 KB |
Output is correct |
64 |
Correct |
97 ms |
43532 KB |
Output is correct |
65 |
Correct |
125 ms |
53796 KB |
Output is correct |
66 |
Correct |
220 ms |
80704 KB |
Output is correct |
67 |
Correct |
196 ms |
80948 KB |
Output is correct |