#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
const int inf = 1e9;
const int mxn = 3e4+10;
const int mxe = mxn*sqrt(mxn)*2;
const int mxv = mxe;
map<pii,vector<int>> mp;
int N,M;
int ecnt,vcnt;
int to[mxe],nid[mxe],wei[mxe];
int head[mxv];
int dist[mxv];
int S,T;
void add_edge(int a,int b,int w){
ecnt++;
nid[ecnt] = head[a];
to[ecnt] = b;
wei[ecnt] = w;
head[a] = ecnt;
}
deque<pii> dq;
void BFS(){
fill(dist,dist+mxv,inf);
dist[S] = 0;
dq.push_back(pii(0,S));
while(!dq.empty()){
auto [d,now] = dq.front();
dq.pop_front();
if(d != dist[now])continue;
for(int eid = head[now];eid;eid = nid[eid]){
int nxt = to[eid],w = wei[eid];
//cout<<now<<' '<<nxt<<":"<<dist[now]+w<<' '<<dist[nxt]<<endl;
if(!w){
if(dist[nxt]>dist[now]){
dist[nxt] = dist[now];
dq.push_front(pii(dist[nxt],nxt));
}
}
else{
if(dist[nxt]>dist[now]+w){
dist[nxt] = dist[now]+w;
dq.push_back(pii(dist[nxt],nxt));
}
}
}
}
return;
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>N>>M;
for(int i = 0;i<M;i++){
pii tmp;
cin>>tmp.fs>>tmp.sc;
mp[pii(tmp.sc,tmp.fs%tmp.sc)].push_back(tmp.fs);
if(!i)S = tmp.fs;
if(i == 1)T = tmp.fs;
}
vcnt = N-1;
for(auto &i:mp){
sort(i.sc.rbegin(),i.sc.rend());
for(int j = i.fs.sc;j<N;j+=i.fs.fs){
vcnt++;
add_edge(vcnt,j,0);
while(!i.sc.empty()&&i.sc.back() == j){
add_edge(i.sc.back(),vcnt,0);
i.sc.pop_back();
}
if(j != i.fs.sc){
add_edge(vcnt-1,vcnt,1);
add_edge(vcnt,vcnt-1,1);
}
}
}
BFS();
cout<<(dist[T]>=inf?-1:dist[T])<<'\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
23 ms |
47196 KB |
Output is correct |
2 |
Correct |
13 ms |
47196 KB |
Output is correct |
3 |
Correct |
13 ms |
47192 KB |
Output is correct |
4 |
Correct |
13 ms |
47252 KB |
Output is correct |
5 |
Correct |
13 ms |
47196 KB |
Output is correct |
6 |
Correct |
12 ms |
47196 KB |
Output is correct |
7 |
Correct |
12 ms |
47196 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
47608 KB |
Output is correct |
2 |
Correct |
15 ms |
47196 KB |
Output is correct |
3 |
Correct |
13 ms |
47196 KB |
Output is correct |
4 |
Correct |
12 ms |
47196 KB |
Output is correct |
5 |
Correct |
12 ms |
47192 KB |
Output is correct |
6 |
Correct |
13 ms |
47312 KB |
Output is correct |
7 |
Correct |
12 ms |
47196 KB |
Output is correct |
8 |
Correct |
12 ms |
47192 KB |
Output is correct |
9 |
Correct |
12 ms |
47196 KB |
Output is correct |
10 |
Correct |
13 ms |
47196 KB |
Output is correct |
11 |
Correct |
17 ms |
47704 KB |
Output is correct |
12 |
Correct |
13 ms |
47320 KB |
Output is correct |
13 |
Correct |
12 ms |
47196 KB |
Output is correct |
14 |
Correct |
13 ms |
47452 KB |
Output is correct |
15 |
Correct |
13 ms |
47452 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
13 ms |
47196 KB |
Output is correct |
2 |
Correct |
13 ms |
47196 KB |
Output is correct |
3 |
Correct |
12 ms |
47196 KB |
Output is correct |
4 |
Correct |
12 ms |
47272 KB |
Output is correct |
5 |
Correct |
13 ms |
47192 KB |
Output is correct |
6 |
Correct |
14 ms |
47256 KB |
Output is correct |
7 |
Correct |
12 ms |
47196 KB |
Output is correct |
8 |
Correct |
13 ms |
47196 KB |
Output is correct |
9 |
Correct |
12 ms |
47296 KB |
Output is correct |
10 |
Correct |
12 ms |
47196 KB |
Output is correct |
11 |
Correct |
13 ms |
47448 KB |
Output is correct |
12 |
Correct |
13 ms |
47312 KB |
Output is correct |
13 |
Correct |
13 ms |
47196 KB |
Output is correct |
14 |
Correct |
14 ms |
47452 KB |
Output is correct |
15 |
Correct |
14 ms |
47452 KB |
Output is correct |
16 |
Correct |
12 ms |
47196 KB |
Output is correct |
17 |
Correct |
14 ms |
47452 KB |
Output is correct |
18 |
Correct |
14 ms |
47424 KB |
Output is correct |
19 |
Correct |
12 ms |
47448 KB |
Output is correct |
20 |
Correct |
13 ms |
47196 KB |
Output is correct |
21 |
Correct |
13 ms |
47444 KB |
Output is correct |
22 |
Correct |
16 ms |
47196 KB |
Output is correct |
23 |
Correct |
13 ms |
47704 KB |
Output is correct |
24 |
Correct |
13 ms |
47452 KB |
Output is correct |
25 |
Correct |
13 ms |
47452 KB |
Output is correct |
26 |
Correct |
16 ms |
47588 KB |
Output is correct |
27 |
Correct |
16 ms |
47196 KB |
Output is correct |
28 |
Correct |
13 ms |
47452 KB |
Output is correct |
29 |
Correct |
14 ms |
47452 KB |
Output is correct |
30 |
Correct |
14 ms |
47196 KB |
Output is correct |
31 |
Correct |
14 ms |
47452 KB |
Output is correct |
32 |
Correct |
13 ms |
47220 KB |
Output is correct |
33 |
Correct |
17 ms |
52060 KB |
Output is correct |
34 |
Correct |
20 ms |
52056 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
47192 KB |
Output is correct |
2 |
Correct |
12 ms |
47204 KB |
Output is correct |
3 |
Correct |
12 ms |
47276 KB |
Output is correct |
4 |
Correct |
12 ms |
47192 KB |
Output is correct |
5 |
Correct |
12 ms |
47192 KB |
Output is correct |
6 |
Correct |
18 ms |
47196 KB |
Output is correct |
7 |
Correct |
12 ms |
47196 KB |
Output is correct |
8 |
Correct |
15 ms |
47312 KB |
Output is correct |
9 |
Correct |
12 ms |
47192 KB |
Output is correct |
10 |
Correct |
13 ms |
47324 KB |
Output is correct |
11 |
Correct |
13 ms |
47452 KB |
Output is correct |
12 |
Correct |
13 ms |
47296 KB |
Output is correct |
13 |
Correct |
12 ms |
47272 KB |
Output is correct |
14 |
Correct |
13 ms |
47452 KB |
Output is correct |
15 |
Correct |
13 ms |
47452 KB |
Output is correct |
16 |
Correct |
13 ms |
47628 KB |
Output is correct |
17 |
Correct |
13 ms |
47452 KB |
Output is correct |
18 |
Correct |
12 ms |
47704 KB |
Output is correct |
19 |
Correct |
13 ms |
47196 KB |
Output is correct |
20 |
Correct |
13 ms |
47192 KB |
Output is correct |
21 |
Correct |
12 ms |
47704 KB |
Output is correct |
22 |
Correct |
12 ms |
47196 KB |
Output is correct |
23 |
Correct |
13 ms |
47452 KB |
Output is correct |
24 |
Correct |
15 ms |
47452 KB |
Output is correct |
25 |
Correct |
18 ms |
47356 KB |
Output is correct |
26 |
Correct |
13 ms |
47192 KB |
Output is correct |
27 |
Correct |
13 ms |
47196 KB |
Output is correct |
28 |
Correct |
14 ms |
47452 KB |
Output is correct |
29 |
Correct |
16 ms |
47704 KB |
Output is correct |
30 |
Correct |
13 ms |
47196 KB |
Output is correct |
31 |
Correct |
17 ms |
47452 KB |
Output is correct |
32 |
Correct |
17 ms |
47396 KB |
Output is correct |
33 |
Correct |
18 ms |
52060 KB |
Output is correct |
34 |
Correct |
18 ms |
52056 KB |
Output is correct |
35 |
Correct |
34 ms |
52552 KB |
Output is correct |
36 |
Correct |
15 ms |
47960 KB |
Output is correct |
37 |
Correct |
31 ms |
56156 KB |
Output is correct |
38 |
Correct |
37 ms |
57428 KB |
Output is correct |
39 |
Correct |
36 ms |
57268 KB |
Output is correct |
40 |
Correct |
42 ms |
57292 KB |
Output is correct |
41 |
Correct |
36 ms |
57432 KB |
Output is correct |
42 |
Correct |
16 ms |
47452 KB |
Output is correct |
43 |
Correct |
16 ms |
47452 KB |
Output is correct |
44 |
Correct |
15 ms |
47452 KB |
Output is correct |
45 |
Correct |
57 ms |
68944 KB |
Output is correct |
46 |
Correct |
71 ms |
69156 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
12 ms |
47192 KB |
Output is correct |
2 |
Correct |
12 ms |
47304 KB |
Output is correct |
3 |
Correct |
12 ms |
47196 KB |
Output is correct |
4 |
Correct |
13 ms |
47196 KB |
Output is correct |
5 |
Correct |
12 ms |
47196 KB |
Output is correct |
6 |
Correct |
12 ms |
47196 KB |
Output is correct |
7 |
Correct |
12 ms |
47192 KB |
Output is correct |
8 |
Correct |
12 ms |
47192 KB |
Output is correct |
9 |
Correct |
13 ms |
47196 KB |
Output is correct |
10 |
Correct |
13 ms |
47196 KB |
Output is correct |
11 |
Correct |
13 ms |
47428 KB |
Output is correct |
12 |
Correct |
13 ms |
47196 KB |
Output is correct |
13 |
Correct |
13 ms |
47316 KB |
Output is correct |
14 |
Correct |
14 ms |
47448 KB |
Output is correct |
15 |
Correct |
13 ms |
47448 KB |
Output is correct |
16 |
Correct |
13 ms |
47196 KB |
Output is correct |
17 |
Correct |
13 ms |
47376 KB |
Output is correct |
18 |
Correct |
13 ms |
47452 KB |
Output is correct |
19 |
Correct |
13 ms |
47196 KB |
Output is correct |
20 |
Correct |
13 ms |
47196 KB |
Output is correct |
21 |
Correct |
13 ms |
47452 KB |
Output is correct |
22 |
Correct |
13 ms |
47452 KB |
Output is correct |
23 |
Correct |
13 ms |
47452 KB |
Output is correct |
24 |
Correct |
14 ms |
47588 KB |
Output is correct |
25 |
Correct |
14 ms |
47452 KB |
Output is correct |
26 |
Correct |
13 ms |
47196 KB |
Output is correct |
27 |
Correct |
13 ms |
47372 KB |
Output is correct |
28 |
Correct |
15 ms |
47708 KB |
Output is correct |
29 |
Correct |
16 ms |
47448 KB |
Output is correct |
30 |
Correct |
13 ms |
47196 KB |
Output is correct |
31 |
Correct |
14 ms |
47452 KB |
Output is correct |
32 |
Correct |
13 ms |
47452 KB |
Output is correct |
33 |
Correct |
18 ms |
52060 KB |
Output is correct |
34 |
Correct |
18 ms |
52056 KB |
Output is correct |
35 |
Correct |
34 ms |
52564 KB |
Output is correct |
36 |
Correct |
15 ms |
47708 KB |
Output is correct |
37 |
Correct |
30 ms |
56160 KB |
Output is correct |
38 |
Correct |
37 ms |
57428 KB |
Output is correct |
39 |
Correct |
35 ms |
57436 KB |
Output is correct |
40 |
Correct |
36 ms |
57320 KB |
Output is correct |
41 |
Correct |
36 ms |
57424 KB |
Output is correct |
42 |
Correct |
20 ms |
47560 KB |
Output is correct |
43 |
Correct |
16 ms |
47452 KB |
Output is correct |
44 |
Correct |
16 ms |
47552 KB |
Output is correct |
45 |
Correct |
54 ms |
69136 KB |
Output is correct |
46 |
Correct |
55 ms |
68912 KB |
Output is correct |
47 |
Correct |
81 ms |
77648 KB |
Output is correct |
48 |
Correct |
29 ms |
56660 KB |
Output is correct |
49 |
Correct |
26 ms |
56412 KB |
Output is correct |
50 |
Correct |
22 ms |
55744 KB |
Output is correct |
51 |
Correct |
45 ms |
62044 KB |
Output is correct |
52 |
Correct |
54 ms |
64340 KB |
Output is correct |
53 |
Correct |
34 ms |
53072 KB |
Output is correct |
54 |
Correct |
13 ms |
47196 KB |
Output is correct |
55 |
Correct |
13 ms |
47448 KB |
Output is correct |
56 |
Correct |
18 ms |
47708 KB |
Output is correct |
57 |
Correct |
32 ms |
63496 KB |
Output is correct |
58 |
Correct |
17 ms |
49756 KB |
Output is correct |
59 |
Correct |
19 ms |
51804 KB |
Output is correct |
60 |
Correct |
20 ms |
54108 KB |
Output is correct |
61 |
Correct |
27 ms |
52536 KB |
Output is correct |
62 |
Correct |
45 ms |
70996 KB |
Output is correct |
63 |
Correct |
205 ms |
139696 KB |
Output is correct |
64 |
Correct |
189 ms |
160080 KB |
Output is correct |
65 |
Incorrect |
112 ms |
183348 KB |
Output isn't correct |
66 |
Halted |
0 ms |
0 KB |
- |