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Submission #204192

# Submission time Handle Problem Language Result Execution time Memory
204192 2020-02-25T02:07:20 Z kig9981 Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 646 ms 3576 KB 
#include <bits/stdc++.h>

#ifdef NON_SUBMIT
#define TEST(n) (n)
#define tout cerr
#else
#define TEST(n) ((void)0)
#define tout cin
#endif

using namespace std;

vector<tuple<int,int,int>> adj[200], radj[200];
vector<tuple<int,int,int,int,int>> E;
int N, P[200];
long long dist1[200], dist2[200], rdist1[200], rdist2[200], dist[200];
bool MP[2][50000];

void dijkstra(int c, long long *dist, vector<tuple<int,int,int>> *adj)
{
	priority_queue<pair<long long,int>> Q;
	for(int i=0;i<N;i++) {
		dist[i]=(i!=c)*0x1f1f1f1f1f1f1f1fLL;
		P[i]=-1;
	}
	Q.emplace(0,c);
	while(!Q.empty()) {
		auto[t,c]=Q.top();
		Q.pop();
		if(-t!=dist[c]) continue;
		for(auto[n,w,i]: adj[c]) if(dist[n]>dist[c]+w) {
			dist[n]=dist[c]+w;
			P[n]=i;
			Q.emplace(-dist[n],n);
		}
	}
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);
	TEST(freopen("input.txt","r",stdin));
	TEST(freopen("output.txt","w",stdout));
	TEST(freopen("debug.txt","w",stderr));
	int M;
	long long ans;
	priority_queue<pair<long long,int>> Q;
	cin>>N>>M;
	E.resize(M);
	for(int i=0;i<M;i++) {
		auto &[u,v,w,x,idx]=E[i];
		cin>>u>>v>>x>>w; idx=i;
		adj[--u].emplace_back(--v,x,i);
		radj[v].emplace_back(u,x,i);
	}
	dijkstra(N-1,dist2,radj); dijkstra(0,dist1,adj);
	for(int c=0;c<N;c++) if(P[c]>-1) MP[0][P[c]]=true;
	dijkstra(0,rdist2,radj); dijkstra(N-1,rdist1,adj);
	for(int c=0;c<N;c++) if(P[c]>-1) MP[1][P[c]]=true;
	ans=dist1[N-1]+rdist1[0];
	for(auto[u,v,w,x,i]: E) {
		long long res=w;
		if(MP[0][i]) {
			for(int i=0;i<N;i++) dist[i]=(i!=0)*0x1f1f1f1f1f1f1f1fLL;
			Q.emplace(0,0);
			while(!Q.empty()) {
				auto[t,c]=Q.top();
				Q.pop();
				if(-t!=dist[c]) continue;
				if(c==v && dist[u]>dist[v]+x) {
					dist[u]=dist[v]+x;
					Q.emplace(-dist[u],u);
				}
				for(auto[n,w,j]: adj[c]) if(i!=j && dist[n]>dist[c]+w) {
					dist[n]=dist[c]+w;
					Q.emplace(-dist[n],n);
				}
			}
			res+=dist[N-1];
		}
		else res+=min(dist1[N-1],dist1[v]+dist2[u]+x);
		if(MP[1][i]) {
			for(int i=0;i<N;i++) dist[i]=(i!=N-1)*0x1f1f1f1f1f1f1f1fLL;
			Q.emplace(0,N-1);
			while(!Q.empty()) {
				auto[t,c]=Q.top();
				Q.pop();
				if(-t!=dist[c]) continue;
				if(c==v && dist[u]>dist[v]+x) {
					dist[u]=dist[v]+x;
					Q.emplace(-dist[u],u);
				}
				for(auto[n,w,j]: adj[c]) if(i!=j && dist[n]>dist[c]+w) {
					dist[n]=dist[c]+w;
					Q.emplace(-dist[n],n);
				}
			}
			res+=dist[0];
		}
		else res+=min(rdist1[0],rdist1[v]+rdist2[u]+x);
		ans=min(ans,res);
	}
	cout<<(ans<0x1f1f1f1f1f1f1f1fLL ? ans:-1)<<'\n';
	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 16 ms 376 KB Output is correct
4 Correct 16 ms 376 KB Output is correct
5 Correct 6 ms 504 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 22 ms 504 KB Output is correct
11 Correct 19 ms 248 KB Output is correct
12 Correct 20 ms 376 KB Output is correct
13 Correct 7 ms 504 KB Output is correct
14 Correct 11 ms 376 KB Output is correct
15 Correct 10 ms 380 KB Output is correct
16 Correct 14 ms 376 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 3320 KB Output is correct
2 Correct 86 ms 3448 KB Output is correct
3 Correct 91 ms 3372 KB Output is correct
4 Correct 14 ms 504 KB Output is correct
5 Correct 9 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 42 ms 3320 KB Output is correct
10 Correct 43 ms 3320 KB Output is correct
11 Correct 69 ms 3448 KB Output is correct
12 Correct 67 ms 3320 KB Output is correct
13 Correct 65 ms 3320 KB Output is correct
14 Correct 61 ms 3576 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 53 ms 2552 KB Output is correct
4 Correct 5 ms 380 KB Output is correct
5 Correct 59 ms 3320 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 34 ms 3320 KB Output is correct
9 Correct 36 ms 3320 KB Output is correct
10 Correct 54 ms 3324 KB Output is correct
11 Correct 47 ms 3320 KB Output is correct
12 Correct 48 ms 3448 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 376 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 5 ms 376 KB Output is correct
19 Correct 49 ms 3576 KB Output is correct
20 Correct 49 ms 3320 KB Output is correct
21 Correct 48 ms 3320 KB Output is correct
22 Correct 50 ms 3320 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 16 ms 376 KB Output is correct
4 Correct 16 ms 376 KB Output is correct
5 Correct 6 ms 504 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 376 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 22 ms 504 KB Output is correct
11 Correct 19 ms 248 KB Output is correct
12 Correct 20 ms 376 KB Output is correct
13 Correct 7 ms 504 KB Output is correct
14 Correct 11 ms 376 KB Output is correct
15 Correct 10 ms 380 KB Output is correct
16 Correct 14 ms 376 KB Output is correct
17 Correct 88 ms 3320 KB Output is correct
18 Correct 86 ms 3448 KB Output is correct
19 Correct 91 ms 3372 KB Output is correct
20 Correct 14 ms 504 KB Output is correct
21 Correct 9 ms 376 KB Output is correct
22 Correct 5 ms 376 KB Output is correct
23 Correct 5 ms 376 KB Output is correct
24 Correct 5 ms 376 KB Output is correct
25 Correct 42 ms 3320 KB Output is correct
26 Correct 43 ms 3320 KB Output is correct
27 Correct 69 ms 3448 KB Output is correct
28 Correct 67 ms 3320 KB Output is correct
29 Correct 65 ms 3320 KB Output is correct
30 Correct 61 ms 3576 KB Output is correct
31 Correct 13 ms 376 KB Output is correct
32 Correct 5 ms 376 KB Output is correct
33 Correct 53 ms 2552 KB Output is correct
34 Correct 5 ms 380 KB Output is correct
35 Correct 59 ms 3320 KB Output is correct
36 Correct 5 ms 376 KB Output is correct
37 Correct 5 ms 376 KB Output is correct
38 Correct 34 ms 3320 KB Output is correct
39 Correct 36 ms 3320 KB Output is correct
40 Correct 54 ms 3324 KB Output is correct
41 Correct 47 ms 3320 KB Output is correct
42 Correct 48 ms 3448 KB Output is correct
43 Correct 5 ms 376 KB Output is correct
44 Correct 5 ms 376 KB Output is correct
45 Correct 5 ms 376 KB Output is correct
46 Correct 5 ms 376 KB Output is correct
47 Correct 5 ms 376 KB Output is correct
48 Correct 5 ms 376 KB Output is correct
49 Correct 49 ms 3576 KB Output is correct
50 Correct 49 ms 3320 KB Output is correct
51 Correct 48 ms 3320 KB Output is correct
52 Correct 50 ms 3320 KB Output is correct
53 Correct 104 ms 3320 KB Output is correct
54 Correct 100 ms 3448 KB Output is correct
55 Correct 98 ms 3320 KB Output is correct
56 Correct 16 ms 376 KB Output is correct
57 Correct 21 ms 376 KB Output is correct
58 Correct 87 ms 2552 KB Output is correct
59 Correct 90 ms 2680 KB Output is correct
60 Correct 94 ms 2556 KB Output is correct
61 Correct 82 ms 2552 KB Output is correct
62 Correct 91 ms 2552 KB Output is correct
63 Correct 92 ms 2604 KB Output is correct
64 Correct 646 ms 3180 KB Output is correct
65 Correct 605 ms 3272 KB Output is correct
66 Correct 564 ms 3280 KB Output is correct
67 Correct 23 ms 2612 KB Output is correct
68 Correct 43 ms 3324 KB Output is correct
69 Correct 42 ms 3320 KB Output is correct
70 Correct 73 ms 3324 KB Output is correct
71 Correct 72 ms 3324 KB Output is correct
72 Correct 73 ms 3320 KB Output is correct
73 Correct 76 ms 3576 KB Output is correct
74 Correct 70 ms 3448 KB Output is correct