#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=3e4+10;
vector<pair<int,int> > graf[1000*1000*2+10];
pair<int,int>w[N];
int l,num[N];
vi li[300];
bitset<N>bb;
bitset<1000*1000*2+10>vis;
vi kol[1000*1000*5+10];
int n,m;
void single(int x){
if(li[x].empty()) return;
for(int i=1;i<=x;i++){
num[i]=++l;
graf[l].push_back({i,0});
}
for(int i=x+1;i<=n;i++){
num[i]=++l;
graf[l].push_back({i,0}),graf[l].push_back({num[i-x],1});
}
for(int i=1;i<=n;i++) bb[i]=0;
for(auto u:li[x]) bb[w[u].fi]=1;
for(int i=1;i<=n;i++) if(bb[i]) graf[i].push_back({num[i],0});
for(int i=n;i>=n-x+1;i--){
num[i]=++l;
graf[l].push_back({i,0});
}
for(int i=n-x;i>=1;i--){
num[i]=++l;
graf[l].push_back({i,0}),graf[l].push_back({num[i+x],1});
}
for(int i=1;i<=n;i++) if(bb[i]) graf[i].push_back({num[i],0});
}
int Dijkstra(int p,int k){
kol[0].push_back(p);
for(int i=0;i<=(int)5e6;i++){
for(int j=0;j<kol[i].size();j++){
int v=kol[i][j];
if(vis[v]) continue;
vis[v]=1;
if(v==k) return i;
for(auto u:graf[v])
if(!vis[u.fi] and i+u.se<=(int)5e6) kol[i+u.se].push_back(u.fi);
}
}
return -1;
}
void solve(){
cin>>n>>m;
l=n;
int p=sqrt(n)/7;
for(int i=1;i<=m;i++){
cin>>w[i].fi>>w[i].se;
w[i].fi++;
if(w[i].se>p){
for(int j=w[i].fi+w[i].se;j<=n;j+=w[i].se) graf[w[i].fi].push_back({j,(j-w[i].fi)/w[i].se});
for(int j=w[i].fi-w[i].se;j>=1;j-=w[i].se) graf[w[i].fi].push_back({j,(w[i].fi-j)/w[i].se});
}else li[w[i].se].push_back(i);
}
for(int i=1;i<=p;i++) single(i);
cout<<Dijkstra(w[1].fi,w[2].fi)<<"\n";
}
int main(){
ios_base::sync_with_stdio(0),cin.tie(0);
solve();
}
Compilation message
skyscraper.cpp: In function 'int Dijkstra(int, int)':
skyscraper.cpp:43:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for(int j=0;j<kol[i].size();j++){
| ~^~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
75 ms |
164676 KB |
Output is correct |
2 |
Correct |
75 ms |
164696 KB |
Output is correct |
3 |
Correct |
75 ms |
164668 KB |
Output is correct |
4 |
Correct |
82 ms |
164688 KB |
Output is correct |
5 |
Correct |
75 ms |
164704 KB |
Output is correct |
6 |
Correct |
73 ms |
164676 KB |
Output is correct |
7 |
Correct |
75 ms |
164632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
73 ms |
164696 KB |
Output is correct |
2 |
Correct |
76 ms |
164644 KB |
Output is correct |
3 |
Correct |
76 ms |
164652 KB |
Output is correct |
4 |
Correct |
85 ms |
164604 KB |
Output is correct |
5 |
Correct |
74 ms |
164676 KB |
Output is correct |
6 |
Correct |
73 ms |
164656 KB |
Output is correct |
7 |
Correct |
75 ms |
164676 KB |
Output is correct |
8 |
Correct |
74 ms |
164696 KB |
Output is correct |
9 |
Correct |
79 ms |
164804 KB |
Output is correct |
10 |
Correct |
77 ms |
164656 KB |
Output is correct |
11 |
Correct |
78 ms |
164768 KB |
Output is correct |
12 |
Correct |
75 ms |
164740 KB |
Output is correct |
13 |
Correct |
76 ms |
164644 KB |
Output is correct |
14 |
Correct |
78 ms |
164764 KB |
Output is correct |
15 |
Correct |
80 ms |
164820 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
76 ms |
164696 KB |
Output is correct |
2 |
Correct |
76 ms |
164588 KB |
Output is correct |
3 |
Correct |
76 ms |
164676 KB |
Output is correct |
4 |
Correct |
86 ms |
164700 KB |
Output is correct |
5 |
Correct |
79 ms |
164676 KB |
Output is correct |
6 |
Correct |
82 ms |
164660 KB |
Output is correct |
7 |
Correct |
75 ms |
164696 KB |
Output is correct |
8 |
Correct |
81 ms |
164688 KB |
Output is correct |
9 |
Correct |
78 ms |
164644 KB |
Output is correct |
10 |
Correct |
76 ms |
164668 KB |
Output is correct |
11 |
Correct |
78 ms |
164860 KB |
Output is correct |
12 |
Correct |
74 ms |
164676 KB |
Output is correct |
13 |
Correct |
77 ms |
164748 KB |
Output is correct |
14 |
Correct |
76 ms |
164780 KB |
Output is correct |
15 |
Correct |
76 ms |
164680 KB |
Output is correct |
16 |
Correct |
82 ms |
164884 KB |
Output is correct |
17 |
Correct |
82 ms |
165140 KB |
Output is correct |
18 |
Correct |
83 ms |
164828 KB |
Output is correct |
19 |
Correct |
82 ms |
164936 KB |
Output is correct |
20 |
Correct |
74 ms |
164944 KB |
Output is correct |
21 |
Correct |
82 ms |
164664 KB |
Output is correct |
22 |
Correct |
82 ms |
164924 KB |
Output is correct |
23 |
Correct |
79 ms |
165060 KB |
Output is correct |
24 |
Correct |
76 ms |
165212 KB |
Output is correct |
25 |
Correct |
75 ms |
165052 KB |
Output is correct |
26 |
Correct |
75 ms |
165316 KB |
Output is correct |
27 |
Correct |
77 ms |
165272 KB |
Output is correct |
28 |
Correct |
81 ms |
165828 KB |
Output is correct |
29 |
Correct |
82 ms |
165700 KB |
Output is correct |
30 |
Correct |
76 ms |
165136 KB |
Output is correct |
31 |
Correct |
80 ms |
165344 KB |
Output is correct |
32 |
Correct |
75 ms |
165076 KB |
Output is correct |
33 |
Correct |
80 ms |
167152 KB |
Output is correct |
34 |
Correct |
82 ms |
167112 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
76 ms |
164604 KB |
Output is correct |
2 |
Correct |
74 ms |
164676 KB |
Output is correct |
3 |
Correct |
78 ms |
164676 KB |
Output is correct |
4 |
Correct |
82 ms |
164688 KB |
Output is correct |
5 |
Correct |
76 ms |
164660 KB |
Output is correct |
6 |
Correct |
77 ms |
164632 KB |
Output is correct |
7 |
Correct |
75 ms |
164628 KB |
Output is correct |
8 |
Correct |
78 ms |
164596 KB |
Output is correct |
9 |
Correct |
76 ms |
164596 KB |
Output is correct |
10 |
Correct |
80 ms |
164616 KB |
Output is correct |
11 |
Correct |
76 ms |
164768 KB |
Output is correct |
12 |
Correct |
80 ms |
164932 KB |
Output is correct |
13 |
Correct |
76 ms |
164724 KB |
Output is correct |
14 |
Correct |
76 ms |
164676 KB |
Output is correct |
15 |
Correct |
83 ms |
164780 KB |
Output is correct |
16 |
Correct |
82 ms |
164736 KB |
Output is correct |
17 |
Correct |
80 ms |
165020 KB |
Output is correct |
18 |
Correct |
84 ms |
164900 KB |
Output is correct |
19 |
Correct |
82 ms |
165004 KB |
Output is correct |
20 |
Correct |
75 ms |
164968 KB |
Output is correct |
21 |
Correct |
82 ms |
164724 KB |
Output is correct |
22 |
Correct |
84 ms |
164972 KB |
Output is correct |
23 |
Correct |
78 ms |
164984 KB |
Output is correct |
24 |
Correct |
77 ms |
165184 KB |
Output is correct |
25 |
Correct |
78 ms |
165136 KB |
Output is correct |
26 |
Correct |
78 ms |
165312 KB |
Output is correct |
27 |
Correct |
77 ms |
165312 KB |
Output is correct |
28 |
Correct |
79 ms |
165708 KB |
Output is correct |
29 |
Correct |
78 ms |
165736 KB |
Output is correct |
30 |
Correct |
78 ms |
165064 KB |
Output is correct |
31 |
Correct |
79 ms |
165316 KB |
Output is correct |
32 |
Correct |
75 ms |
165060 KB |
Output is correct |
33 |
Correct |
85 ms |
167188 KB |
Output is correct |
34 |
Correct |
82 ms |
167008 KB |
Output is correct |
35 |
Correct |
83 ms |
166540 KB |
Output is correct |
36 |
Correct |
76 ms |
165100 KB |
Output is correct |
37 |
Correct |
83 ms |
168004 KB |
Output is correct |
38 |
Correct |
87 ms |
167720 KB |
Output is correct |
39 |
Correct |
87 ms |
167348 KB |
Output is correct |
40 |
Correct |
86 ms |
167396 KB |
Output is correct |
41 |
Correct |
85 ms |
167624 KB |
Output is correct |
42 |
Correct |
80 ms |
165612 KB |
Output is correct |
43 |
Correct |
79 ms |
165572 KB |
Output is correct |
44 |
Correct |
83 ms |
165240 KB |
Output is correct |
45 |
Correct |
97 ms |
172100 KB |
Output is correct |
46 |
Correct |
91 ms |
171888 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
78 ms |
164676 KB |
Output is correct |
2 |
Correct |
75 ms |
164676 KB |
Output is correct |
3 |
Correct |
77 ms |
164696 KB |
Output is correct |
4 |
Correct |
85 ms |
164740 KB |
Output is correct |
5 |
Correct |
79 ms |
164820 KB |
Output is correct |
6 |
Correct |
74 ms |
164652 KB |
Output is correct |
7 |
Correct |
74 ms |
164648 KB |
Output is correct |
8 |
Correct |
75 ms |
164676 KB |
Output is correct |
9 |
Correct |
75 ms |
164664 KB |
Output is correct |
10 |
Correct |
80 ms |
164844 KB |
Output is correct |
11 |
Correct |
76 ms |
164800 KB |
Output is correct |
12 |
Correct |
77 ms |
164696 KB |
Output is correct |
13 |
Correct |
75 ms |
164676 KB |
Output is correct |
14 |
Correct |
74 ms |
164804 KB |
Output is correct |
15 |
Correct |
76 ms |
164860 KB |
Output is correct |
16 |
Correct |
87 ms |
164676 KB |
Output is correct |
17 |
Correct |
76 ms |
164932 KB |
Output is correct |
18 |
Correct |
82 ms |
164776 KB |
Output is correct |
19 |
Correct |
84 ms |
164968 KB |
Output is correct |
20 |
Correct |
78 ms |
164936 KB |
Output is correct |
21 |
Correct |
86 ms |
164868 KB |
Output is correct |
22 |
Correct |
83 ms |
164892 KB |
Output is correct |
23 |
Correct |
79 ms |
164876 KB |
Output is correct |
24 |
Correct |
77 ms |
165232 KB |
Output is correct |
25 |
Correct |
101 ms |
165164 KB |
Output is correct |
26 |
Correct |
80 ms |
165316 KB |
Output is correct |
27 |
Correct |
77 ms |
165344 KB |
Output is correct |
28 |
Correct |
81 ms |
165772 KB |
Output is correct |
29 |
Correct |
77 ms |
165808 KB |
Output is correct |
30 |
Correct |
76 ms |
165024 KB |
Output is correct |
31 |
Correct |
79 ms |
165328 KB |
Output is correct |
32 |
Correct |
79 ms |
165188 KB |
Output is correct |
33 |
Correct |
80 ms |
167108 KB |
Output is correct |
34 |
Correct |
82 ms |
167108 KB |
Output is correct |
35 |
Correct |
85 ms |
166528 KB |
Output is correct |
36 |
Correct |
78 ms |
165012 KB |
Output is correct |
37 |
Correct |
92 ms |
168036 KB |
Output is correct |
38 |
Correct |
96 ms |
167748 KB |
Output is correct |
39 |
Correct |
87 ms |
167368 KB |
Output is correct |
40 |
Correct |
88 ms |
167396 KB |
Output is correct |
41 |
Correct |
89 ms |
167640 KB |
Output is correct |
42 |
Correct |
86 ms |
165684 KB |
Output is correct |
43 |
Correct |
85 ms |
165572 KB |
Output is correct |
44 |
Correct |
80 ms |
165220 KB |
Output is correct |
45 |
Correct |
94 ms |
172072 KB |
Output is correct |
46 |
Correct |
92 ms |
171876 KB |
Output is correct |
47 |
Correct |
129 ms |
184440 KB |
Output is correct |
48 |
Correct |
158 ms |
191172 KB |
Output is correct |
49 |
Correct |
121 ms |
177348 KB |
Output is correct |
50 |
Correct |
137 ms |
185244 KB |
Output is correct |
51 |
Correct |
166 ms |
199584 KB |
Output is correct |
52 |
Correct |
182 ms |
201676 KB |
Output is correct |
53 |
Correct |
96 ms |
170840 KB |
Output is correct |
54 |
Correct |
90 ms |
167108 KB |
Output is correct |
55 |
Correct |
102 ms |
171160 KB |
Output is correct |
56 |
Correct |
93 ms |
168876 KB |
Output is correct |
57 |
Correct |
144 ms |
190556 KB |
Output is correct |
58 |
Correct |
117 ms |
178216 KB |
Output is correct |
59 |
Correct |
156 ms |
191528 KB |
Output is correct |
60 |
Correct |
161 ms |
192160 KB |
Output is correct |
61 |
Correct |
148 ms |
185744 KB |
Output is correct |
62 |
Correct |
182 ms |
208964 KB |
Output is correct |
63 |
Correct |
129 ms |
193808 KB |
Output is correct |
64 |
Correct |
144 ms |
200392 KB |
Output is correct |
65 |
Correct |
175 ms |
216352 KB |
Output is correct |
66 |
Runtime error |
267 ms |
262148 KB |
Execution killed with signal 9 |
67 |
Halted |
0 ms |
0 KB |
- |