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Submission #485378

# Submission time Handle Problem Language Result Execution time Memory
485378 2021-11-07T13:39:29 Z PoPularPlusPlus Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 293 ms 5556 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}

const int N = 203;
vector<ar<ll,3>> adj[N];
ll dis[N];
vector<ar<ll,4>> v;

void Dijkstra(ll e , int idx){
	 priority_queue< pair<ll,ll>, vector <pair<ll,ll>> , greater<pair<ll,ll>> > pq; 
	 dis[e]=0;
	 pq.push({0,e});
	 while(!pq.empty()){
		 ll node = pq.top().second,ww=pq.top().first;
		 pq.pop();
		 if(dis[node] < ww)continue;
		 for(auto i : adj[node]){
			 if(i[2] == idx)continue;
			 ll w = i[1];
			 if(dis[i[0]] > dis[node] + w){
				 dis[i[0]] = dis[node] + w;
				 pq.push({dis[i[0]],i[0]});
			 }
		 }
		 if(node == v[idx][1]){
			 ll w = v[idx][2];
			 if(dis[v[idx][0]] > dis[node] + w){
				dis[v[idx][0]] = dis[node] + w;
				pq.push({dis[v[idx][0]],v[idx][0]}); 
			 }
		 }
	 }
}

void solve(){
	int n , m;
	cin >> n >> m;
	ll fw[n][n];
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++){
			if(i == j)fw[i][j] = 0;
			else fw[i][j] = 1e18;
		}
	}
	for(int i = 0; i < m; i++){
		ll a , b , c , d;
		cin >> a >> b >> c >> d;
		a--;
		b--;
		adj[a].push_back({b,c,i});
		v.push_back({a,b,c,d});
		fw[a][b] = min(fw[a][b] , c);
	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++){
			for(int k =0 ; k < n; k++){
				fw[j][k] = min(fw[j][k] , fw[j][i] + fw[i][k]);
			}
		}
	}
	ll ans = fw[0][n-1] + fw[n-1][0];
	for(int i = 0; i < m; i++){
		ll res = min(fw[0][n-1] , fw[0][v[i][1]] + fw[v[i][0]][n-1]) + min(fw[n-1][0] , fw[n-1][v[i][1]] + fw[v[i][0]][0]) + v[i][3] + v[i][2];
		if(res < ans){
			for(int j = 0; j < n; j++)dis[j] = 1e18;
			Dijkstra(0 , i);
			res = dis[n-1];
			for(int j = 0; j < n; j++)dis[j] = 1e18;
			Dijkstra(n-1 , i);
			res += dis[0];
			res += v[i][3];
			ans = min(ans , res);
		}
	}
	cout << (ans >= 1e18 ? -1 : ans) << '\n';
}

int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	//int t;cin >> t;while(t--)
	solve();
	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 712 KB Output is correct
2 Correct 10 ms 588 KB Output is correct
3 Correct 8 ms 716 KB Output is correct
4 Correct 9 ms 732 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 8 ms 588 KB Output is correct
7 Correct 0 ms 216 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 11 ms 716 KB Output is correct
11 Correct 18 ms 716 KB Output is correct
12 Correct 8 ms 716 KB Output is correct
13 Correct 8 ms 716 KB Output is correct
14 Correct 12 ms 728 KB Output is correct
15 Correct 12 ms 728 KB Output is correct
16 Correct 12 ms 732 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 5132 KB Output is correct
2 Correct 26 ms 5112 KB Output is correct
3 Correct 27 ms 5240 KB Output is correct
4 Correct 9 ms 716 KB Output is correct
5 Correct 8 ms 724 KB Output is correct
6 Correct 11 ms 696 KB Output is correct
7 Correct 9 ms 588 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 35 ms 5308 KB Output is correct
10 Correct 28 ms 5308 KB Output is correct
11 Correct 26 ms 5272 KB Output is correct
12 Correct 26 ms 5316 KB Output is correct
13 Correct 27 ms 5388 KB Output is correct
14 Correct 26 ms 5556 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 720 KB Output is correct
2 Correct 8 ms 588 KB Output is correct
3 Correct 20 ms 4672 KB Output is correct
4 Correct 8 ms 588 KB Output is correct
5 Correct 29 ms 4932 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 27 ms 5048 KB Output is correct
9 Correct 29 ms 4996 KB Output is correct
10 Correct 25 ms 5000 KB Output is correct
11 Correct 24 ms 5052 KB Output is correct
12 Correct 26 ms 5068 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 320 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 30 ms 5200 KB Output is correct
20 Correct 25 ms 5052 KB Output is correct
21 Correct 28 ms 5096 KB Output is correct
22 Correct 24 ms 4924 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 712 KB Output is correct
2 Correct 10 ms 588 KB Output is correct
3 Correct 8 ms 716 KB Output is correct
4 Correct 9 ms 732 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 8 ms 588 KB Output is correct
7 Correct 0 ms 216 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 11 ms 716 KB Output is correct
11 Correct 18 ms 716 KB Output is correct
12 Correct 8 ms 716 KB Output is correct
13 Correct 8 ms 716 KB Output is correct
14 Correct 12 ms 728 KB Output is correct
15 Correct 12 ms 728 KB Output is correct
16 Correct 12 ms 732 KB Output is correct
17 Correct 28 ms 5132 KB Output is correct
18 Correct 26 ms 5112 KB Output is correct
19 Correct 27 ms 5240 KB Output is correct
20 Correct 9 ms 716 KB Output is correct
21 Correct 8 ms 724 KB Output is correct
22 Correct 11 ms 696 KB Output is correct
23 Correct 9 ms 588 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 35 ms 5308 KB Output is correct
26 Correct 28 ms 5308 KB Output is correct
27 Correct 26 ms 5272 KB Output is correct
28 Correct 26 ms 5316 KB Output is correct
29 Correct 27 ms 5388 KB Output is correct
30 Correct 26 ms 5556 KB Output is correct
31 Correct 8 ms 720 KB Output is correct
32 Correct 8 ms 588 KB Output is correct
33 Correct 20 ms 4672 KB Output is correct
34 Correct 8 ms 588 KB Output is correct
35 Correct 29 ms 4932 KB Output is correct
36 Correct 1 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 27 ms 5048 KB Output is correct
39 Correct 29 ms 4996 KB Output is correct
40 Correct 25 ms 5000 KB Output is correct
41 Correct 24 ms 5052 KB Output is correct
42 Correct 26 ms 5068 KB Output is correct
43 Correct 0 ms 204 KB Output is correct
44 Correct 0 ms 204 KB Output is correct
45 Correct 0 ms 320 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 30 ms 5200 KB Output is correct
50 Correct 25 ms 5052 KB Output is correct
51 Correct 28 ms 5096 KB Output is correct
52 Correct 24 ms 4924 KB Output is correct
53 Correct 33 ms 5044 KB Output is correct
54 Correct 31 ms 5056 KB Output is correct
55 Correct 26 ms 4920 KB Output is correct
56 Correct 10 ms 716 KB Output is correct
57 Correct 9 ms 724 KB Output is correct
58 Correct 28 ms 4836 KB Output is correct
59 Correct 24 ms 4780 KB Output is correct
60 Correct 24 ms 4808 KB Output is correct
61 Correct 24 ms 4784 KB Output is correct
62 Correct 47 ms 4792 KB Output is correct
63 Correct 75 ms 4868 KB Output is correct
64 Correct 77 ms 4796 KB Output is correct
65 Correct 172 ms 4800 KB Output is correct
66 Correct 293 ms 4888 KB Output is correct
67 Correct 14 ms 4116 KB Output is correct
68 Correct 34 ms 5296 KB Output is correct
69 Correct 30 ms 5316 KB Output is correct
70 Correct 31 ms 5192 KB Output is correct
71 Correct 28 ms 5300 KB Output is correct
72 Correct 30 ms 5096 KB Output is correct
73 Correct 27 ms 5136 KB Output is correct
74 Correct 28 ms 5224 KB Output is correct