#include<bits/stdc++.h>
#define fi first
#define se second
#define pii pair<int,int>
#define mp make_pair
using namespace std;
const int N=30005;
int n,m,b[N],p[N],d[N];
vector<pii>adj[N];
vector<int>have[N];
bool Have(int pos, int val)
{
return binary_search(have[pos].begin(), have[pos].end(), val);
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin>>n>>m;
for(int i=1;i<=m;i++)
{
cin>>b[i]>>p[i];
b[i]++;
have[b[i]].push_back(p[i]);
}
for(int i=1;i<=n;i++)
{
sort(have[i].begin(),have[i].end());
have[i].erase(unique(have[i].begin(),have[i].end()),have[i].end());
}
memset(d,-1,sizeof d);
d[b[1]]=0;
priority_queue<pii,vector<pii>,greater<pii>>pq;
pq.push(mp(0,b[1]));
while(!pq.empty())
{
auto u=pq.top();
pq.pop();
if(u.fi!=d[u.se]) continue;
for(auto&x:have[u.se])
{
int cnt=0,cur=u.se;
while(cur+x<=n)
{
cnt++;
cur+=x;
if(d[cur]==-1||d[cur]>u.fi+cnt)
{
d[cur]=u.fi+cnt;
pq.push(mp(d[cur],cur));
}
if(Have(cur,x)) break;
}
cur=u.se;
cnt=0;
while(cur-x>=1)
{
cnt++;
cur-=x;
if(d[cur]==-1||d[cur]>u.fi+cnt)
{
d[cur]=u.fi+cnt;
pq.push(mp(d[cur],cur));
}
if(Have(cur,x)) break;
}
}
}
cout<<d[b[2]];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1920 KB |
Output is correct |
2 |
Correct |
2 ms |
1920 KB |
Output is correct |
3 |
Correct |
2 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1792 KB |
Output is correct |
6 |
Correct |
1 ms |
1792 KB |
Output is correct |
7 |
Correct |
2 ms |
1792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1792 KB |
Output is correct |
2 |
Correct |
1 ms |
1792 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
2 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1792 KB |
Output is correct |
6 |
Correct |
2 ms |
1792 KB |
Output is correct |
7 |
Correct |
2 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1792 KB |
Output is correct |
10 |
Correct |
1 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
3 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1792 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1792 KB |
Output is correct |
4 |
Correct |
2 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
2 ms |
1792 KB |
Output is correct |
7 |
Correct |
2 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1792 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
2 ms |
1920 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
2 ms |
1920 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
2 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
1920 KB |
Output is correct |
24 |
Correct |
3 ms |
1920 KB |
Output is correct |
25 |
Correct |
3 ms |
1920 KB |
Output is correct |
26 |
Correct |
2 ms |
1920 KB |
Output is correct |
27 |
Correct |
2 ms |
1920 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
4 ms |
2048 KB |
Output is correct |
30 |
Correct |
2 ms |
1920 KB |
Output is correct |
31 |
Correct |
3 ms |
2048 KB |
Output is correct |
32 |
Correct |
2 ms |
1920 KB |
Output is correct |
33 |
Correct |
6 ms |
2304 KB |
Output is correct |
34 |
Correct |
6 ms |
2304 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1920 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
1 ms |
1792 KB |
Output is correct |
7 |
Correct |
1 ms |
1920 KB |
Output is correct |
8 |
Correct |
1 ms |
1792 KB |
Output is correct |
9 |
Correct |
2 ms |
1920 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
4 ms |
1920 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
2 ms |
1920 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
2 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
1920 KB |
Output is correct |
24 |
Correct |
3 ms |
2048 KB |
Output is correct |
25 |
Correct |
3 ms |
1920 KB |
Output is correct |
26 |
Correct |
2 ms |
1952 KB |
Output is correct |
27 |
Correct |
2 ms |
1920 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
4 ms |
2048 KB |
Output is correct |
30 |
Correct |
2 ms |
1920 KB |
Output is correct |
31 |
Correct |
3 ms |
2048 KB |
Output is correct |
32 |
Correct |
2 ms |
1920 KB |
Output is correct |
33 |
Correct |
6 ms |
2304 KB |
Output is correct |
34 |
Correct |
6 ms |
2304 KB |
Output is correct |
35 |
Correct |
10 ms |
2304 KB |
Output is correct |
36 |
Correct |
3 ms |
2048 KB |
Output is correct |
37 |
Correct |
11 ms |
2304 KB |
Output is correct |
38 |
Correct |
13 ms |
2432 KB |
Output is correct |
39 |
Correct |
13 ms |
2472 KB |
Output is correct |
40 |
Correct |
13 ms |
2432 KB |
Output is correct |
41 |
Correct |
13 ms |
2432 KB |
Output is correct |
42 |
Correct |
7 ms |
2560 KB |
Output is correct |
43 |
Correct |
7 ms |
2560 KB |
Output is correct |
44 |
Correct |
7 ms |
2560 KB |
Output is correct |
45 |
Correct |
14 ms |
2816 KB |
Output is correct |
46 |
Correct |
16 ms |
2816 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1792 KB |
Output is correct |
2 |
Correct |
1 ms |
1920 KB |
Output is correct |
3 |
Correct |
1 ms |
1920 KB |
Output is correct |
4 |
Correct |
1 ms |
1920 KB |
Output is correct |
5 |
Correct |
1 ms |
1920 KB |
Output is correct |
6 |
Correct |
1 ms |
1920 KB |
Output is correct |
7 |
Correct |
2 ms |
1920 KB |
Output is correct |
8 |
Correct |
2 ms |
1920 KB |
Output is correct |
9 |
Correct |
1 ms |
1792 KB |
Output is correct |
10 |
Correct |
2 ms |
1920 KB |
Output is correct |
11 |
Correct |
2 ms |
1920 KB |
Output is correct |
12 |
Correct |
2 ms |
1920 KB |
Output is correct |
13 |
Correct |
2 ms |
1920 KB |
Output is correct |
14 |
Correct |
2 ms |
1920 KB |
Output is correct |
15 |
Correct |
2 ms |
1920 KB |
Output is correct |
16 |
Correct |
2 ms |
1920 KB |
Output is correct |
17 |
Correct |
2 ms |
1920 KB |
Output is correct |
18 |
Correct |
2 ms |
1920 KB |
Output is correct |
19 |
Correct |
2 ms |
1920 KB |
Output is correct |
20 |
Correct |
2 ms |
1920 KB |
Output is correct |
21 |
Correct |
2 ms |
1920 KB |
Output is correct |
22 |
Correct |
2 ms |
1920 KB |
Output is correct |
23 |
Correct |
2 ms |
1920 KB |
Output is correct |
24 |
Correct |
3 ms |
1920 KB |
Output is correct |
25 |
Correct |
3 ms |
1920 KB |
Output is correct |
26 |
Correct |
2 ms |
1920 KB |
Output is correct |
27 |
Correct |
2 ms |
1920 KB |
Output is correct |
28 |
Correct |
2 ms |
1920 KB |
Output is correct |
29 |
Correct |
4 ms |
2048 KB |
Output is correct |
30 |
Correct |
2 ms |
1920 KB |
Output is correct |
31 |
Correct |
3 ms |
2044 KB |
Output is correct |
32 |
Correct |
2 ms |
1920 KB |
Output is correct |
33 |
Correct |
5 ms |
2304 KB |
Output is correct |
34 |
Correct |
6 ms |
2304 KB |
Output is correct |
35 |
Correct |
10 ms |
2304 KB |
Output is correct |
36 |
Correct |
3 ms |
2048 KB |
Output is correct |
37 |
Correct |
12 ms |
2304 KB |
Output is correct |
38 |
Correct |
14 ms |
2432 KB |
Output is correct |
39 |
Correct |
13 ms |
2432 KB |
Output is correct |
40 |
Correct |
13 ms |
2432 KB |
Output is correct |
41 |
Correct |
13 ms |
2432 KB |
Output is correct |
42 |
Correct |
7 ms |
2560 KB |
Output is correct |
43 |
Correct |
7 ms |
2560 KB |
Output is correct |
44 |
Correct |
7 ms |
2560 KB |
Output is correct |
45 |
Correct |
14 ms |
2944 KB |
Output is correct |
46 |
Correct |
14 ms |
2816 KB |
Output is correct |
47 |
Correct |
32 ms |
3324 KB |
Output is correct |
48 |
Correct |
9 ms |
2816 KB |
Output is correct |
49 |
Correct |
8 ms |
2688 KB |
Output is correct |
50 |
Correct |
6 ms |
2560 KB |
Output is correct |
51 |
Correct |
42 ms |
3708 KB |
Output is correct |
52 |
Correct |
35 ms |
3708 KB |
Output is correct |
53 |
Correct |
19 ms |
3668 KB |
Output is correct |
54 |
Correct |
3 ms |
2048 KB |
Output is correct |
55 |
Correct |
4 ms |
2048 KB |
Output is correct |
56 |
Correct |
11 ms |
3292 KB |
Output is correct |
57 |
Correct |
28 ms |
2680 KB |
Output is correct |
58 |
Correct |
9 ms |
2560 KB |
Output is correct |
59 |
Correct |
10 ms |
2688 KB |
Output is correct |
60 |
Correct |
11 ms |
2688 KB |
Output is correct |
61 |
Correct |
10 ms |
2688 KB |
Output is correct |
62 |
Correct |
16 ms |
3328 KB |
Output is correct |
63 |
Correct |
49 ms |
4724 KB |
Output is correct |
64 |
Correct |
51 ms |
4724 KB |
Output is correct |
65 |
Correct |
67 ms |
4724 KB |
Output is correct |
66 |
Correct |
132 ms |
6768 KB |
Output is correct |
67 |
Correct |
141 ms |
6768 KB |
Output is correct |