#include <bits/stdc++.h>
using namespace std;
#pragma GCC target("avx2,popcnt,sse4")
#pragma GCC optimize("O3,unroll-loops")
#define ll long long
#define pll pair<ll,ll>
#define pii pair<short,short>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
const int inf = 1e9+10;
const int mxn = 3e4+10;
const int mxe = mxn*sqrt(mxn)*2.5;
const int mxv = mxn*sqrt(mxn)*2.1;
map<pii,vector<int>> mp;
int N,M;
int ecnt,vcnt;
int to[mxe],nid[mxe];
bitset<mxv> wei;
int head[mxv];
int dist[mxv];
int S,T;
int ts;
void add_edge(int a,int b,int w){
ecnt++;
nid[ecnt] = head[a];
to[ecnt] = b;
wei[ecnt] = w;
head[a] = ecnt;
}
bitset<mxv> done;
deque<int> dq;
void BFS(){
dq.resize(mxv*2);
fill(dist,dist+mxv,inf);
dist[S] = 0;
dq.push_back(S);
while(!dq.empty()){
int now = dq.front();
dq.pop_front();
if(done[now])continue;
done[now] = true;
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(nxt);
}
}
else{
if(dist[nxt]>dist[now]+w){
dist[nxt] = dist[now]+w;
dq.push_back(nxt);
}
}
}
}
return;
}
int main(){
ts = clock();
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 |
81 ms |
137720 KB |
Output is correct |
2 |
Correct |
81 ms |
137920 KB |
Output is correct |
3 |
Correct |
81 ms |
137812 KB |
Output is correct |
4 |
Correct |
81 ms |
137920 KB |
Output is correct |
5 |
Correct |
77 ms |
137812 KB |
Output is correct |
6 |
Correct |
80 ms |
137920 KB |
Output is correct |
7 |
Correct |
94 ms |
137920 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
78 ms |
137916 KB |
Output is correct |
2 |
Correct |
77 ms |
137852 KB |
Output is correct |
3 |
Correct |
79 ms |
137928 KB |
Output is correct |
4 |
Correct |
78 ms |
137700 KB |
Output is correct |
5 |
Correct |
102 ms |
137812 KB |
Output is correct |
6 |
Correct |
84 ms |
137924 KB |
Output is correct |
7 |
Correct |
77 ms |
137920 KB |
Output is correct |
8 |
Correct |
80 ms |
137872 KB |
Output is correct |
9 |
Correct |
79 ms |
137832 KB |
Output is correct |
10 |
Correct |
79 ms |
137808 KB |
Output is correct |
11 |
Correct |
80 ms |
138064 KB |
Output is correct |
12 |
Correct |
78 ms |
137932 KB |
Output is correct |
13 |
Correct |
77 ms |
137932 KB |
Output is correct |
14 |
Correct |
80 ms |
138064 KB |
Output is correct |
15 |
Correct |
84 ms |
138068 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
80 ms |
137812 KB |
Output is correct |
2 |
Correct |
77 ms |
137808 KB |
Output is correct |
3 |
Correct |
78 ms |
137832 KB |
Output is correct |
4 |
Correct |
77 ms |
137808 KB |
Output is correct |
5 |
Correct |
83 ms |
137904 KB |
Output is correct |
6 |
Correct |
94 ms |
137808 KB |
Output is correct |
7 |
Correct |
78 ms |
137808 KB |
Output is correct |
8 |
Correct |
78 ms |
137916 KB |
Output is correct |
9 |
Correct |
76 ms |
137812 KB |
Output is correct |
10 |
Correct |
78 ms |
137808 KB |
Output is correct |
11 |
Correct |
78 ms |
138064 KB |
Output is correct |
12 |
Correct |
78 ms |
137812 KB |
Output is correct |
13 |
Correct |
80 ms |
137808 KB |
Output is correct |
14 |
Correct |
86 ms |
137912 KB |
Output is correct |
15 |
Correct |
79 ms |
138064 KB |
Output is correct |
16 |
Correct |
76 ms |
138020 KB |
Output is correct |
17 |
Correct |
81 ms |
138068 KB |
Output is correct |
18 |
Correct |
77 ms |
137972 KB |
Output is correct |
19 |
Correct |
77 ms |
137808 KB |
Output is correct |
20 |
Correct |
80 ms |
137808 KB |
Output is correct |
21 |
Correct |
78 ms |
137812 KB |
Output is correct |
22 |
Correct |
76 ms |
138028 KB |
Output is correct |
23 |
Correct |
90 ms |
138172 KB |
Output is correct |
24 |
Correct |
79 ms |
138068 KB |
Output is correct |
25 |
Correct |
82 ms |
138068 KB |
Output is correct |
26 |
Correct |
77 ms |
137872 KB |
Output is correct |
27 |
Correct |
79 ms |
137808 KB |
Output is correct |
28 |
Correct |
85 ms |
138324 KB |
Output is correct |
29 |
Correct |
80 ms |
142160 KB |
Output is correct |
30 |
Correct |
82 ms |
137808 KB |
Output is correct |
31 |
Correct |
78 ms |
140116 KB |
Output is correct |
32 |
Correct |
77 ms |
138068 KB |
Output is correct |
33 |
Correct |
91 ms |
142928 KB |
Output is correct |
34 |
Correct |
82 ms |
142676 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
78 ms |
137808 KB |
Output is correct |
2 |
Correct |
78 ms |
137812 KB |
Output is correct |
3 |
Correct |
80 ms |
137812 KB |
Output is correct |
4 |
Correct |
78 ms |
137812 KB |
Output is correct |
5 |
Correct |
78 ms |
137820 KB |
Output is correct |
6 |
Correct |
78 ms |
137812 KB |
Output is correct |
7 |
Correct |
82 ms |
137808 KB |
Output is correct |
8 |
Correct |
77 ms |
137812 KB |
Output is correct |
9 |
Correct |
85 ms |
137808 KB |
Output is correct |
10 |
Correct |
83 ms |
137872 KB |
Output is correct |
11 |
Correct |
82 ms |
137988 KB |
Output is correct |
12 |
Correct |
77 ms |
137840 KB |
Output is correct |
13 |
Correct |
81 ms |
138228 KB |
Output is correct |
14 |
Correct |
77 ms |
138068 KB |
Output is correct |
15 |
Correct |
79 ms |
138068 KB |
Output is correct |
16 |
Correct |
78 ms |
137812 KB |
Output is correct |
17 |
Correct |
87 ms |
138316 KB |
Output is correct |
18 |
Correct |
107 ms |
138064 KB |
Output is correct |
19 |
Correct |
78 ms |
137812 KB |
Output is correct |
20 |
Correct |
77 ms |
137812 KB |
Output is correct |
21 |
Correct |
80 ms |
138056 KB |
Output is correct |
22 |
Correct |
82 ms |
137912 KB |
Output is correct |
23 |
Correct |
79 ms |
138060 KB |
Output is correct |
24 |
Correct |
79 ms |
138068 KB |
Output is correct |
25 |
Correct |
78 ms |
138068 KB |
Output is correct |
26 |
Correct |
78 ms |
137984 KB |
Output is correct |
27 |
Correct |
78 ms |
137808 KB |
Output is correct |
28 |
Correct |
79 ms |
138068 KB |
Output is correct |
29 |
Correct |
81 ms |
142236 KB |
Output is correct |
30 |
Correct |
77 ms |
137912 KB |
Output is correct |
31 |
Correct |
82 ms |
140112 KB |
Output is correct |
32 |
Correct |
79 ms |
137812 KB |
Output is correct |
33 |
Correct |
82 ms |
142676 KB |
Output is correct |
34 |
Correct |
81 ms |
142676 KB |
Output is correct |
35 |
Correct |
94 ms |
145092 KB |
Output is correct |
36 |
Correct |
81 ms |
138404 KB |
Output is correct |
37 |
Correct |
94 ms |
144616 KB |
Output is correct |
38 |
Correct |
99 ms |
145720 KB |
Output is correct |
39 |
Correct |
100 ms |
145788 KB |
Output is correct |
40 |
Correct |
100 ms |
145748 KB |
Output is correct |
41 |
Correct |
114 ms |
145652 KB |
Output is correct |
42 |
Correct |
87 ms |
138068 KB |
Output is correct |
43 |
Correct |
83 ms |
138000 KB |
Output is correct |
44 |
Correct |
81 ms |
137956 KB |
Output is correct |
45 |
Correct |
114 ms |
155472 KB |
Output is correct |
46 |
Correct |
115 ms |
155220 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
80 ms |
137812 KB |
Output is correct |
2 |
Correct |
77 ms |
137824 KB |
Output is correct |
3 |
Correct |
79 ms |
137812 KB |
Output is correct |
4 |
Correct |
76 ms |
137924 KB |
Output is correct |
5 |
Correct |
78 ms |
137924 KB |
Output is correct |
6 |
Correct |
78 ms |
137804 KB |
Output is correct |
7 |
Correct |
84 ms |
138040 KB |
Output is correct |
8 |
Correct |
78 ms |
137812 KB |
Output is correct |
9 |
Correct |
77 ms |
137808 KB |
Output is correct |
10 |
Correct |
78 ms |
137876 KB |
Output is correct |
11 |
Correct |
79 ms |
137972 KB |
Output is correct |
12 |
Correct |
81 ms |
137940 KB |
Output is correct |
13 |
Correct |
77 ms |
137828 KB |
Output is correct |
14 |
Correct |
79 ms |
137968 KB |
Output is correct |
15 |
Correct |
78 ms |
138068 KB |
Output is correct |
16 |
Correct |
79 ms |
137900 KB |
Output is correct |
17 |
Correct |
80 ms |
138168 KB |
Output is correct |
18 |
Correct |
79 ms |
138068 KB |
Output is correct |
19 |
Correct |
79 ms |
137916 KB |
Output is correct |
20 |
Correct |
78 ms |
137832 KB |
Output is correct |
21 |
Correct |
78 ms |
138052 KB |
Output is correct |
22 |
Correct |
84 ms |
137928 KB |
Output is correct |
23 |
Correct |
82 ms |
137812 KB |
Output is correct |
24 |
Correct |
80 ms |
138068 KB |
Output is correct |
25 |
Correct |
81 ms |
138196 KB |
Output is correct |
26 |
Correct |
79 ms |
137900 KB |
Output is correct |
27 |
Correct |
81 ms |
137772 KB |
Output is correct |
28 |
Correct |
79 ms |
138240 KB |
Output is correct |
29 |
Correct |
81 ms |
142164 KB |
Output is correct |
30 |
Correct |
83 ms |
137808 KB |
Output is correct |
31 |
Correct |
84 ms |
140444 KB |
Output is correct |
32 |
Correct |
80 ms |
138068 KB |
Output is correct |
33 |
Correct |
83 ms |
142680 KB |
Output is correct |
34 |
Correct |
84 ms |
142684 KB |
Output is correct |
35 |
Correct |
94 ms |
145004 KB |
Output is correct |
36 |
Correct |
83 ms |
138504 KB |
Output is correct |
37 |
Correct |
93 ms |
144720 KB |
Output is correct |
38 |
Correct |
100 ms |
145744 KB |
Output is correct |
39 |
Correct |
102 ms |
145876 KB |
Output is correct |
40 |
Correct |
108 ms |
146000 KB |
Output is correct |
41 |
Correct |
101 ms |
145716 KB |
Output is correct |
42 |
Correct |
82 ms |
138092 KB |
Output is correct |
43 |
Correct |
80 ms |
138000 KB |
Output is correct |
44 |
Correct |
87 ms |
138184 KB |
Output is correct |
45 |
Correct |
119 ms |
155240 KB |
Output is correct |
46 |
Correct |
116 ms |
155216 KB |
Output is correct |
47 |
Correct |
128 ms |
161872 KB |
Output is correct |
48 |
Correct |
95 ms |
147788 KB |
Output is correct |
49 |
Correct |
92 ms |
145012 KB |
Output is correct |
50 |
Correct |
90 ms |
144208 KB |
Output is correct |
51 |
Correct |
112 ms |
150612 KB |
Output is correct |
52 |
Correct |
122 ms |
150772 KB |
Output is correct |
53 |
Correct |
100 ms |
145568 KB |
Output is correct |
54 |
Correct |
80 ms |
140100 KB |
Output is correct |
55 |
Correct |
79 ms |
140116 KB |
Output is correct |
56 |
Correct |
84 ms |
140344 KB |
Output is correct |
57 |
Correct |
96 ms |
151984 KB |
Output is correct |
58 |
Correct |
82 ms |
142416 KB |
Output is correct |
59 |
Correct |
84 ms |
142456 KB |
Output is correct |
60 |
Correct |
85 ms |
142708 KB |
Output is correct |
61 |
Correct |
91 ms |
143040 KB |
Output is correct |
62 |
Correct |
116 ms |
155476 KB |
Output is correct |
63 |
Correct |
208 ms |
203604 KB |
Output is correct |
64 |
Correct |
239 ms |
217940 KB |
Output is correct |
65 |
Runtime error |
230 ms |
262148 KB |
Execution killed with signal 9 |
66 |
Halted |
0 ms |
0 KB |
- |