#include <bits/stdc++.h>
using namespace std;
#define ll long long
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define usecppio ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define all(x) ((x).begin()),((x).end())
#define int ll
using pii = pair <int, int>;
#define INF 0x7f7f7f7f7f7f7f7f
const bool debug = false;
const int MX = 30202;
struct Edge
{
int dest, w;
bool operator<(const Edge &p) const
{
return w > p.w;
}
};
bool relax(Edge edge, int u, int dist[])
{
bool flag = 0;
int v = edge.dest, w = edge.w;
if (dist[v] > dist[u] + w && (dist[u]!=INF))
{
flag = true;
dist[v] = dist[u]+w;
}
return flag;
}
void dijkstra(int dist[], int start, vector<Edge> graph[])
{
fill(dist,dist+MX,INF);
dist[start] = 0;
priority_queue<Edge> pq;
pq.push({start,0});
while(!pq.empty())
{
Edge x = pq.top();
int v = x.dest, w = x.w;
pq.pop();
if (w>dist[v])
continue;
for (auto ed : graph[v])
if (relax(ed, v, dist))
pq.push({ed.dest,dist[ed.dest]});
}
}
int n, m;
vector <int> bi(30303, 0), pi(30303, 0);
vector <Edge> G[30303];
bitset <30303> mark[30303];
vector <int> doge[30303];
int distances[30303];
bool visit[30303];
void print_graph()
{
for (int i = 0; i<n; i++)
{
for (auto it:G[i])
printf("From %lld to %lld, %lld\n",i, it.dest, it.w);
}
}
queue<pii> q;
int32_t main()
{
usecppio
cin >> n >> m;
for (int i = 0; i<m; i++)
{
cin >> bi[i] >> pi[i];
if (!mark[bi[i]][pi[i]] && i!=1)
{
mark[bi[i]][pi[i]] = true;
doge[bi[i]].push_back(pi[i]);
}
}
visit[bi[0]] = true;
for (auto it:doge[bi[0]])
{
q.push({it, bi[0]});
}
memset(distances, 0x7f, sizeof(distances));
while (!q.empty())
{
auto dg = q.front();
q.pop();
for (int i = 1; ; i++)
{
int u = dg.second+i*dg.first;
if (u >= n) break;
G[dg.second].push_back({u, i});
if (!visit[u])
{
visit[u] = true;
for (auto unseen:doge[u])
{
q.push({unseen, u});
}
}
}
for (int i = -1; ; i--)
{
int u = dg.second+i*dg.first;
if (u < 0) break;
G[dg.second].push_back({u, -i});
if (!visit[u])
{
visit[u] = true;
for (auto unseen:doge[u])
{
q.push({unseen, u});
}
}
}
}
//print_graph();
dijkstra(distances,bi[0],G);
if (distances[bi[1]] >= 10000000)
{
printf("-1");
}
else printf("%lld\n",distances[bi[1]]);
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2424 KB |
Output is correct |
2 |
Correct |
6 ms |
2424 KB |
Output is correct |
3 |
Correct |
6 ms |
2424 KB |
Output is correct |
4 |
Correct |
6 ms |
2424 KB |
Output is correct |
5 |
Correct |
7 ms |
2424 KB |
Output is correct |
6 |
Correct |
6 ms |
2552 KB |
Output is correct |
7 |
Correct |
6 ms |
2552 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2424 KB |
Output is correct |
2 |
Correct |
7 ms |
2424 KB |
Output is correct |
3 |
Correct |
9 ms |
2424 KB |
Output is correct |
4 |
Correct |
6 ms |
2424 KB |
Output is correct |
5 |
Correct |
6 ms |
2424 KB |
Output is correct |
6 |
Correct |
6 ms |
2552 KB |
Output is correct |
7 |
Correct |
6 ms |
2424 KB |
Output is correct |
8 |
Correct |
6 ms |
2552 KB |
Output is correct |
9 |
Correct |
6 ms |
2552 KB |
Output is correct |
10 |
Correct |
6 ms |
2936 KB |
Output is correct |
11 |
Correct |
7 ms |
3064 KB |
Output is correct |
12 |
Correct |
6 ms |
2552 KB |
Output is correct |
13 |
Correct |
7 ms |
3064 KB |
Output is correct |
14 |
Correct |
10 ms |
2808 KB |
Output is correct |
15 |
Correct |
6 ms |
2808 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2424 KB |
Output is correct |
2 |
Correct |
6 ms |
2424 KB |
Output is correct |
3 |
Correct |
6 ms |
2424 KB |
Output is correct |
4 |
Correct |
7 ms |
2424 KB |
Output is correct |
5 |
Correct |
6 ms |
2424 KB |
Output is correct |
6 |
Correct |
6 ms |
2424 KB |
Output is correct |
7 |
Correct |
6 ms |
2552 KB |
Output is correct |
8 |
Correct |
6 ms |
2552 KB |
Output is correct |
9 |
Correct |
6 ms |
2552 KB |
Output is correct |
10 |
Correct |
6 ms |
2936 KB |
Output is correct |
11 |
Correct |
16 ms |
3064 KB |
Output is correct |
12 |
Correct |
6 ms |
2552 KB |
Output is correct |
13 |
Correct |
6 ms |
3064 KB |
Output is correct |
14 |
Correct |
6 ms |
2808 KB |
Output is correct |
15 |
Correct |
7 ms |
2808 KB |
Output is correct |
16 |
Correct |
6 ms |
3192 KB |
Output is correct |
17 |
Correct |
9 ms |
5624 KB |
Output is correct |
18 |
Correct |
8 ms |
5496 KB |
Output is correct |
19 |
Correct |
8 ms |
4472 KB |
Output is correct |
20 |
Correct |
90 ms |
74232 KB |
Output is correct |
21 |
Correct |
7 ms |
3960 KB |
Output is correct |
22 |
Correct |
7 ms |
4856 KB |
Output is correct |
23 |
Correct |
8 ms |
5496 KB |
Output is correct |
24 |
Correct |
11 ms |
7416 KB |
Output is correct |
25 |
Correct |
10 ms |
7544 KB |
Output is correct |
26 |
Correct |
7 ms |
3064 KB |
Output is correct |
27 |
Correct |
7 ms |
2936 KB |
Output is correct |
28 |
Correct |
13 ms |
10384 KB |
Output is correct |
29 |
Correct |
9 ms |
4088 KB |
Output is correct |
30 |
Correct |
8 ms |
3192 KB |
Output is correct |
31 |
Correct |
8 ms |
3576 KB |
Output is correct |
32 |
Correct |
7 ms |
3320 KB |
Output is correct |
33 |
Correct |
10 ms |
5108 KB |
Output is correct |
34 |
Correct |
11 ms |
5108 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
2552 KB |
Output is correct |
2 |
Correct |
6 ms |
2424 KB |
Output is correct |
3 |
Correct |
6 ms |
2424 KB |
Output is correct |
4 |
Correct |
6 ms |
2424 KB |
Output is correct |
5 |
Correct |
6 ms |
2424 KB |
Output is correct |
6 |
Correct |
6 ms |
2424 KB |
Output is correct |
7 |
Correct |
6 ms |
2552 KB |
Output is correct |
8 |
Correct |
6 ms |
2552 KB |
Output is correct |
9 |
Correct |
6 ms |
2552 KB |
Output is correct |
10 |
Correct |
6 ms |
2936 KB |
Output is correct |
11 |
Correct |
7 ms |
3064 KB |
Output is correct |
12 |
Correct |
6 ms |
2552 KB |
Output is correct |
13 |
Correct |
7 ms |
3064 KB |
Output is correct |
14 |
Correct |
6 ms |
2808 KB |
Output is correct |
15 |
Correct |
6 ms |
2808 KB |
Output is correct |
16 |
Correct |
7 ms |
3192 KB |
Output is correct |
17 |
Correct |
9 ms |
5624 KB |
Output is correct |
18 |
Correct |
8 ms |
5496 KB |
Output is correct |
19 |
Correct |
7 ms |
4472 KB |
Output is correct |
20 |
Correct |
87 ms |
74232 KB |
Output is correct |
21 |
Correct |
7 ms |
3960 KB |
Output is correct |
22 |
Correct |
8 ms |
4856 KB |
Output is correct |
23 |
Correct |
9 ms |
5496 KB |
Output is correct |
24 |
Correct |
11 ms |
7416 KB |
Output is correct |
25 |
Correct |
10 ms |
7544 KB |
Output is correct |
26 |
Correct |
7 ms |
3064 KB |
Output is correct |
27 |
Correct |
7 ms |
2936 KB |
Output is correct |
28 |
Correct |
13 ms |
10360 KB |
Output is correct |
29 |
Correct |
9 ms |
4220 KB |
Output is correct |
30 |
Correct |
7 ms |
3192 KB |
Output is correct |
31 |
Correct |
8 ms |
3576 KB |
Output is correct |
32 |
Correct |
7 ms |
3320 KB |
Output is correct |
33 |
Correct |
10 ms |
5236 KB |
Output is correct |
34 |
Correct |
11 ms |
5108 KB |
Output is correct |
35 |
Correct |
21 ms |
11384 KB |
Output is correct |
36 |
Correct |
11 ms |
7032 KB |
Output is correct |
37 |
Correct |
25 ms |
16376 KB |
Output is correct |
38 |
Correct |
27 ms |
15480 KB |
Output is correct |
39 |
Correct |
27 ms |
15736 KB |
Output is correct |
40 |
Correct |
26 ms |
15480 KB |
Output is correct |
41 |
Correct |
26 ms |
15352 KB |
Output is correct |
42 |
Correct |
10 ms |
3320 KB |
Output is correct |
43 |
Correct |
10 ms |
3064 KB |
Output is correct |
44 |
Correct |
92 ms |
74360 KB |
Output is correct |
45 |
Correct |
20 ms |
12276 KB |
Output is correct |
46 |
Correct |
21 ms |
12280 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
2424 KB |
Output is correct |
2 |
Correct |
6 ms |
2424 KB |
Output is correct |
3 |
Correct |
6 ms |
2424 KB |
Output is correct |
4 |
Correct |
6 ms |
2424 KB |
Output is correct |
5 |
Correct |
6 ms |
2424 KB |
Output is correct |
6 |
Correct |
6 ms |
2424 KB |
Output is correct |
7 |
Correct |
6 ms |
2424 KB |
Output is correct |
8 |
Correct |
6 ms |
2552 KB |
Output is correct |
9 |
Correct |
6 ms |
2552 KB |
Output is correct |
10 |
Correct |
7 ms |
2936 KB |
Output is correct |
11 |
Correct |
7 ms |
3064 KB |
Output is correct |
12 |
Correct |
6 ms |
2552 KB |
Output is correct |
13 |
Correct |
7 ms |
3064 KB |
Output is correct |
14 |
Correct |
6 ms |
2808 KB |
Output is correct |
15 |
Correct |
6 ms |
2808 KB |
Output is correct |
16 |
Correct |
6 ms |
3192 KB |
Output is correct |
17 |
Correct |
9 ms |
5624 KB |
Output is correct |
18 |
Correct |
8 ms |
5496 KB |
Output is correct |
19 |
Correct |
7 ms |
4472 KB |
Output is correct |
20 |
Correct |
89 ms |
74232 KB |
Output is correct |
21 |
Correct |
7 ms |
3960 KB |
Output is correct |
22 |
Correct |
8 ms |
4856 KB |
Output is correct |
23 |
Correct |
9 ms |
5496 KB |
Output is correct |
24 |
Correct |
11 ms |
7420 KB |
Output is correct |
25 |
Correct |
10 ms |
7544 KB |
Output is correct |
26 |
Correct |
7 ms |
3064 KB |
Output is correct |
27 |
Correct |
7 ms |
2936 KB |
Output is correct |
28 |
Correct |
13 ms |
10360 KB |
Output is correct |
29 |
Correct |
8 ms |
4088 KB |
Output is correct |
30 |
Correct |
8 ms |
3064 KB |
Output is correct |
31 |
Correct |
8 ms |
3576 KB |
Output is correct |
32 |
Correct |
7 ms |
3320 KB |
Output is correct |
33 |
Correct |
10 ms |
5108 KB |
Output is correct |
34 |
Correct |
11 ms |
5108 KB |
Output is correct |
35 |
Correct |
20 ms |
11384 KB |
Output is correct |
36 |
Correct |
11 ms |
7032 KB |
Output is correct |
37 |
Correct |
24 ms |
16376 KB |
Output is correct |
38 |
Correct |
26 ms |
15484 KB |
Output is correct |
39 |
Correct |
27 ms |
15740 KB |
Output is correct |
40 |
Correct |
27 ms |
15480 KB |
Output is correct |
41 |
Correct |
25 ms |
15352 KB |
Output is correct |
42 |
Correct |
11 ms |
3320 KB |
Output is correct |
43 |
Correct |
12 ms |
3064 KB |
Output is correct |
44 |
Correct |
93 ms |
74360 KB |
Output is correct |
45 |
Correct |
21 ms |
12280 KB |
Output is correct |
46 |
Correct |
21 ms |
12280 KB |
Output is correct |
47 |
Correct |
80 ms |
64892 KB |
Output is correct |
48 |
Correct |
54 ms |
59128 KB |
Output is correct |
49 |
Correct |
57 ms |
59128 KB |
Output is correct |
50 |
Correct |
44 ms |
48504 KB |
Output is correct |
51 |
Correct |
101 ms |
85612 KB |
Output is correct |
52 |
Correct |
102 ms |
85828 KB |
Output is correct |
53 |
Correct |
74 ms |
77816 KB |
Output is correct |
54 |
Correct |
8 ms |
3192 KB |
Output is correct |
55 |
Correct |
9 ms |
3320 KB |
Output is correct |
56 |
Runtime error |
248 ms |
262148 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
57 |
Halted |
0 ms |
0 KB |
- |