#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define watch(x) cout<<(#x)<<"="<<(x)<<'\n'
#define mset(d,val) memset(d,val,sizeof(d))
#define setp(x) cout<<fixed<<setprecision(x)
#define forn(i,a,b) for(int i=(a);i<(b);i++)
#define fore(i,a,b) for(int i=(a);i<=(b);i++)
#define pb push_back
#define F first
#define S second
#define pqueue priority_queue
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef pair<ll,ii> iii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
void amin(ll &a, ll b){ a=min(a,b); }
void amax(ll &a, ll b){ a=max(a,b); }
void YES(){cout<<"YES\n";} void NO(){cout<<"NO\n";}
void SD(int t=0){ cout<<"PASSED "<<t<<endl; }
const ll INF = ll(1e18);
const int MOD = 998244353;
const bool DEBUG = 0;
const int MAXN = 30005;
const int MAXP = 30005;
const int MAXM = 30005;
const int LIM = 10;
int n,m;
int a[MAXM],p[MAXM];
vi v[MAXN];
ll dist[MAXN][LIM];
priority_queue<iii,vector<iii>,greater<iii>> q;
void add(ll x, ll y, ll w, ll d)
{
if(x<0 || x>=n) return;
if(y>=LIM)
{
for(int i=x%y;i<n;i+=y){
add(i, 0, abs(x-i)/y, d);
}
}
else
{
if(dist[x][y]>d+w){
dist[x][y]=d+w;
q.push({dist[x][y],{x,y}});
}
}
}
void dijkstra(ii src)
{
dist[src.F][src.S]=0;
q.push({0,src});
while(!q.empty())
{
ii u=q.top().S; q.pop();
if(u.S)
{
add(u.F-u.S, u.S, 1, dist[u.F][u.S]);
add(u.F+u.S, u.S, 1, dist[u.F][u.S]);
add(u.F, 0, 0, dist[u.F][u.S]);
}
else
{
for(int P: v[u.F])
{
add(u.F, P, 0, dist[u.F][u.S]);
}
}
}
}
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
cin>>n>>m;
forn(i,0,m){
cin>>a[i]>>p[i];
v[a[i]].pb(p[i]);
}
forn(i,0,n) forn(j,0,LIM) dist[i][j]=INF;
dijkstra({a[0],0});
if(dist[a[1]][0]<INF) cout<<dist[a[1]][0]<<'\n';
else cout<<-1<<'\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1024 KB |
Output is correct |
2 |
Correct |
1 ms |
1024 KB |
Output is correct |
3 |
Correct |
1 ms |
1024 KB |
Output is correct |
4 |
Correct |
1 ms |
1024 KB |
Output is correct |
5 |
Correct |
1 ms |
1024 KB |
Output is correct |
6 |
Correct |
1 ms |
1024 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1024 KB |
Output is correct |
2 |
Correct |
1 ms |
1024 KB |
Output is correct |
3 |
Correct |
1 ms |
1024 KB |
Output is correct |
4 |
Correct |
1 ms |
1024 KB |
Output is correct |
5 |
Correct |
1 ms |
1024 KB |
Output is correct |
6 |
Correct |
1 ms |
1024 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
8 |
Correct |
1 ms |
1024 KB |
Output is correct |
9 |
Correct |
1 ms |
1024 KB |
Output is correct |
10 |
Correct |
1 ms |
1024 KB |
Output is correct |
11 |
Correct |
1 ms |
1152 KB |
Output is correct |
12 |
Correct |
1 ms |
1152 KB |
Output is correct |
13 |
Correct |
1 ms |
1152 KB |
Output is correct |
14 |
Correct |
1 ms |
1152 KB |
Output is correct |
15 |
Correct |
1 ms |
1152 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1024 KB |
Output is correct |
2 |
Correct |
1 ms |
1024 KB |
Output is correct |
3 |
Correct |
1 ms |
1024 KB |
Output is correct |
4 |
Correct |
1 ms |
1024 KB |
Output is correct |
5 |
Correct |
1 ms |
1024 KB |
Output is correct |
6 |
Correct |
1 ms |
1024 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
8 |
Correct |
1 ms |
1024 KB |
Output is correct |
9 |
Correct |
1 ms |
1152 KB |
Output is correct |
10 |
Correct |
1 ms |
1024 KB |
Output is correct |
11 |
Correct |
1 ms |
1152 KB |
Output is correct |
12 |
Correct |
1 ms |
1152 KB |
Output is correct |
13 |
Correct |
1 ms |
1152 KB |
Output is correct |
14 |
Correct |
1 ms |
1152 KB |
Output is correct |
15 |
Correct |
1 ms |
1152 KB |
Output is correct |
16 |
Correct |
1 ms |
1152 KB |
Output is correct |
17 |
Correct |
2 ms |
1280 KB |
Output is correct |
18 |
Correct |
1 ms |
1280 KB |
Output is correct |
19 |
Correct |
1 ms |
1280 KB |
Output is correct |
20 |
Correct |
1 ms |
1280 KB |
Output is correct |
21 |
Correct |
1 ms |
1152 KB |
Output is correct |
22 |
Correct |
1 ms |
1280 KB |
Output is correct |
23 |
Correct |
2 ms |
1280 KB |
Output is correct |
24 |
Correct |
2 ms |
1280 KB |
Output is correct |
25 |
Correct |
2 ms |
1280 KB |
Output is correct |
26 |
Correct |
1 ms |
1280 KB |
Output is correct |
27 |
Correct |
1 ms |
1280 KB |
Output is correct |
28 |
Correct |
2 ms |
1280 KB |
Output is correct |
29 |
Correct |
3 ms |
1600 KB |
Output is correct |
30 |
Correct |
2 ms |
1408 KB |
Output is correct |
31 |
Correct |
2 ms |
1536 KB |
Output is correct |
32 |
Correct |
2 ms |
1408 KB |
Output is correct |
33 |
Correct |
6 ms |
1728 KB |
Output is correct |
34 |
Correct |
5 ms |
1728 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1024 KB |
Output is correct |
2 |
Correct |
1 ms |
1024 KB |
Output is correct |
3 |
Correct |
1 ms |
1024 KB |
Output is correct |
4 |
Correct |
1 ms |
1024 KB |
Output is correct |
5 |
Correct |
1 ms |
1024 KB |
Output is correct |
6 |
Correct |
1 ms |
1024 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
8 |
Correct |
1 ms |
1024 KB |
Output is correct |
9 |
Correct |
1 ms |
1024 KB |
Output is correct |
10 |
Correct |
1 ms |
1024 KB |
Output is correct |
11 |
Correct |
1 ms |
1152 KB |
Output is correct |
12 |
Correct |
1 ms |
1152 KB |
Output is correct |
13 |
Correct |
1 ms |
1152 KB |
Output is correct |
14 |
Correct |
2 ms |
1152 KB |
Output is correct |
15 |
Correct |
1 ms |
1152 KB |
Output is correct |
16 |
Correct |
1 ms |
1152 KB |
Output is correct |
17 |
Correct |
2 ms |
1280 KB |
Output is correct |
18 |
Correct |
1 ms |
1280 KB |
Output is correct |
19 |
Correct |
1 ms |
1280 KB |
Output is correct |
20 |
Correct |
2 ms |
1280 KB |
Output is correct |
21 |
Correct |
1 ms |
1152 KB |
Output is correct |
22 |
Correct |
1 ms |
1152 KB |
Output is correct |
23 |
Correct |
2 ms |
1280 KB |
Output is correct |
24 |
Correct |
2 ms |
1408 KB |
Output is correct |
25 |
Correct |
2 ms |
1280 KB |
Output is correct |
26 |
Correct |
1 ms |
1280 KB |
Output is correct |
27 |
Correct |
2 ms |
1280 KB |
Output is correct |
28 |
Correct |
3 ms |
1280 KB |
Output is correct |
29 |
Correct |
3 ms |
1600 KB |
Output is correct |
30 |
Correct |
3 ms |
1408 KB |
Output is correct |
31 |
Correct |
2 ms |
1536 KB |
Output is correct |
32 |
Correct |
2 ms |
1408 KB |
Output is correct |
33 |
Correct |
5 ms |
1728 KB |
Output is correct |
34 |
Correct |
6 ms |
1728 KB |
Output is correct |
35 |
Correct |
12 ms |
1920 KB |
Output is correct |
36 |
Correct |
3 ms |
1280 KB |
Output is correct |
37 |
Correct |
14 ms |
1972 KB |
Output is correct |
38 |
Correct |
17 ms |
2176 KB |
Output is correct |
39 |
Correct |
24 ms |
2048 KB |
Output is correct |
40 |
Correct |
16 ms |
2176 KB |
Output is correct |
41 |
Correct |
15 ms |
2048 KB |
Output is correct |
42 |
Correct |
6 ms |
1792 KB |
Output is correct |
43 |
Correct |
6 ms |
1792 KB |
Output is correct |
44 |
Correct |
6 ms |
1828 KB |
Output is correct |
45 |
Correct |
13 ms |
2116 KB |
Output is correct |
46 |
Correct |
13 ms |
2116 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
1024 KB |
Output is correct |
2 |
Correct |
1 ms |
1024 KB |
Output is correct |
3 |
Correct |
1 ms |
1024 KB |
Output is correct |
4 |
Correct |
1 ms |
1024 KB |
Output is correct |
5 |
Correct |
1 ms |
1024 KB |
Output is correct |
6 |
Correct |
1 ms |
1024 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
8 |
Correct |
1 ms |
1024 KB |
Output is correct |
9 |
Correct |
1 ms |
1024 KB |
Output is correct |
10 |
Correct |
1 ms |
1024 KB |
Output is correct |
11 |
Correct |
1 ms |
1152 KB |
Output is correct |
12 |
Correct |
2 ms |
1152 KB |
Output is correct |
13 |
Correct |
2 ms |
1152 KB |
Output is correct |
14 |
Correct |
2 ms |
1152 KB |
Output is correct |
15 |
Correct |
2 ms |
1152 KB |
Output is correct |
16 |
Correct |
1 ms |
1152 KB |
Output is correct |
17 |
Correct |
2 ms |
1280 KB |
Output is correct |
18 |
Correct |
2 ms |
1152 KB |
Output is correct |
19 |
Correct |
1 ms |
1280 KB |
Output is correct |
20 |
Correct |
2 ms |
1280 KB |
Output is correct |
21 |
Correct |
1 ms |
1152 KB |
Output is correct |
22 |
Correct |
1 ms |
1280 KB |
Output is correct |
23 |
Correct |
2 ms |
1280 KB |
Output is correct |
24 |
Correct |
3 ms |
1280 KB |
Output is correct |
25 |
Correct |
2 ms |
1280 KB |
Output is correct |
26 |
Correct |
2 ms |
1280 KB |
Output is correct |
27 |
Correct |
2 ms |
1280 KB |
Output is correct |
28 |
Correct |
2 ms |
1280 KB |
Output is correct |
29 |
Correct |
3 ms |
1600 KB |
Output is correct |
30 |
Correct |
2 ms |
1408 KB |
Output is correct |
31 |
Correct |
2 ms |
1536 KB |
Output is correct |
32 |
Correct |
3 ms |
1408 KB |
Output is correct |
33 |
Correct |
7 ms |
1728 KB |
Output is correct |
34 |
Correct |
6 ms |
1728 KB |
Output is correct |
35 |
Correct |
10 ms |
1920 KB |
Output is correct |
36 |
Correct |
3 ms |
1280 KB |
Output is correct |
37 |
Correct |
12 ms |
1920 KB |
Output is correct |
38 |
Correct |
19 ms |
2176 KB |
Output is correct |
39 |
Correct |
15 ms |
2048 KB |
Output is correct |
40 |
Correct |
14 ms |
2176 KB |
Output is correct |
41 |
Correct |
14 ms |
2048 KB |
Output is correct |
42 |
Correct |
8 ms |
1792 KB |
Output is correct |
43 |
Correct |
10 ms |
1792 KB |
Output is correct |
44 |
Correct |
7 ms |
1828 KB |
Output is correct |
45 |
Correct |
14 ms |
2116 KB |
Output is correct |
46 |
Correct |
15 ms |
2116 KB |
Output is correct |
47 |
Correct |
57 ms |
3580 KB |
Output is correct |
48 |
Correct |
10 ms |
3456 KB |
Output is correct |
49 |
Correct |
8 ms |
3712 KB |
Output is correct |
50 |
Correct |
8 ms |
3712 KB |
Output is correct |
51 |
Correct |
49 ms |
5872 KB |
Output is correct |
52 |
Correct |
61 ms |
5880 KB |
Output is correct |
53 |
Correct |
18 ms |
4224 KB |
Output is correct |
54 |
Correct |
3 ms |
3328 KB |
Output is correct |
55 |
Correct |
4 ms |
3328 KB |
Output is correct |
56 |
Correct |
11 ms |
4608 KB |
Output is correct |
57 |
Correct |
169 ms |
6772 KB |
Output is correct |
58 |
Correct |
11 ms |
3968 KB |
Output is correct |
59 |
Correct |
11 ms |
3968 KB |
Output is correct |
60 |
Correct |
12 ms |
3968 KB |
Output is correct |
61 |
Correct |
17 ms |
3968 KB |
Output is correct |
62 |
Correct |
26 ms |
4608 KB |
Output is correct |
63 |
Correct |
68 ms |
7284 KB |
Output is correct |
64 |
Correct |
66 ms |
7284 KB |
Output is correct |
65 |
Correct |
101 ms |
10344 KB |
Output is correct |
66 |
Correct |
165 ms |
10344 KB |
Output is correct |
67 |
Correct |
161 ms |
10216 KB |
Output is correct |