oj.uz

Submission #529413

# Submission time Handle Problem Language Result Execution time Memory
529413 2022-02-23T01:55:39 Z rk42745417 Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 167 ms 3704 KB 
#include <bits/stdc++.h>
using namespace std;

#define EmiliaMyWife ios::sync_with_stdio(0); cin.tie(0);
using ll = int64_t;
using ull = uint64_t;
using uint = uint32_t;
using ld = long double;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const ll LINF = ll(4e18) + ll(2e15);
const double EPS = 1e-9;
static int LamyIsCute = []() {
	EmiliaMyWife
	return 48763;
}();

const int N = 207, M = 5e4 + 25;
struct dat {
	int v, c, i;
};
vector<dat> edge[N], redge[N];
bool is[M];
int n;
int len[M], cost[M];
ll dis[N][N];
pair<int, int> edges[M];

ll dijk(int s, int t, int id) {
	vector<ll> dis(n + 1, LINF);
	vector<bool> vis(n + 1);
	dis[s] = 0;
	while(true) {
		int u = -1;
		for(int i = 1; i <= n; i++)
			if(!vis[i] && (u == -1 || dis[u] > dis[i]))
				u = i;
		if(u == -1)
			break;
		vis[u] = true;
		for(const auto &[v, c, i] : edge[u])
			if(i != id && dis[v] > dis[u] + c)
				dis[v] = dis[u] + c;
	}
	return dis[t];
}
ll brute(int id) {
	if(~id)
		edge[edges[id].second].push_back({edges[id].first, len[id], -1});
	ll ret = dijk(1, n, id) + dijk(n, 1, id);
	if(~id)
		edge[edges[id].second].pop_back();
	return ret;
}
void dijk2(int s) {
	vector<ll> dis(n + 1, LINF);
	vector<int> lst(n + 1, -1);
	dis[s] = 0;
	vector<bool> vis(n + 1);
	while(true) {
		int u = -1;
		for(int i = 1; i <= n; i++)
			if(!vis[i] && (u == -1 || dis[u] > dis[i]))
				u = i;
		if(u == -1 || dis[u] == LINF)
			break;
		if(~lst[u])
			is[lst[u]] = true;
		vis[u] = true;
		for(const auto &[v, c, id] : edge[u])
			if(dis[v] > dis[u] + c)
				dis[v] = dis[u] + c, lst[v] = id;
	}
}
signed main() {
	int m;
	cin >> n >> m;
	for(int i = 0; i < m; i++) {
		int u, v, c, d;
		cin >> u >> v >> c >> d;
		edge[u].push_back({v, c, i});
		redge[v].push_back({u, c, i});
		cost[i] = d;
		len[i] = c;
		edges[i] = {u, v};
	}

	dijk2(1);
	dijk2(n);
	
	for(int i = 0; i < N; i++)
		for(int j = 0; j < N; j++)
			if(i != j)
				dis[i][j] = LINF;
	for(int i = 0; i < m; i++)
		dis[edges[i].first][edges[i].second] = min<ll>(dis[edges[i].first][edges[i].second], len[i]);
	for(int k = 1; k <= n; k++)
		for(int i = 1; i <= n; i++)
			for(int j = 1; j <= n; j++)
				dis[i][j] = min(dis[i][j], dis[i][k] + dis[k][j]);

	ll ans = dis[1][n] + dis[n][1];
	for(int i = 0; i < m; i++) {
		const auto &[u, v] = edges[i];
		if(is[i])
			ans = min(ans, brute(i) + cost[i]);
		else
			ans = min(ans, min(dis[1][n], dis[1][v] + dis[u][n] + len[i]) + min(dis[n][1], dis[n][v] + dis[u][1] + len[i])  + cost[i]);
	}
	if(ans > 2e9)
		cout << "-1\n";
	else
		cout << ans << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 716 KB Output is correct
2 Correct 12 ms 688 KB Output is correct
3 Correct 58 ms 732 KB Output is correct
4 Correct 60 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 11 ms 688 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 46 ms 720 KB Output is correct
11 Correct 61 ms 724 KB Output is correct
12 Correct 55 ms 720 KB Output is correct
13 Correct 32 ms 716 KB Output is correct
14 Correct 50 ms 716 KB Output is correct
15 Correct 48 ms 716 KB Output is correct
16 Correct 44 ms 716 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 3452 KB Output is correct
2 Correct 119 ms 3468 KB Output is correct
3 Correct 107 ms 3404 KB Output is correct
4 Correct 53 ms 792 KB Output is correct
5 Correct 46 ms 716 KB Output is correct
6 Correct 11 ms 588 KB Output is correct
7 Correct 14 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 78 ms 3412 KB Output is correct
10 Correct 65 ms 3408 KB Output is correct
11 Correct 93 ms 3508 KB Output is correct
12 Correct 95 ms 3492 KB Output is correct
13 Correct 95 ms 3584 KB Output is correct
14 Correct 92 ms 3704 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 716 KB Output is correct
2 Correct 24 ms 588 KB Output is correct
3 Correct 112 ms 2688 KB Output is correct
4 Correct 15 ms 588 KB Output is correct
5 Correct 122 ms 3420 KB Output is correct
6 Correct 0 ms 588 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 75 ms 3404 KB Output is correct
9 Correct 78 ms 3408 KB Output is correct
10 Correct 107 ms 3404 KB Output is correct
11 Correct 96 ms 3404 KB Output is correct
12 Correct 101 ms 3512 KB Output is correct
13 Correct 1 ms 588 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 1 ms 588 KB Output is correct
16 Correct 1 ms 588 KB Output is correct
17 Correct 0 ms 588 KB Output is correct
18 Correct 0 ms 588 KB Output is correct
19 Correct 102 ms 3552 KB Output is correct
20 Correct 97 ms 3448 KB Output is correct
21 Correct 100 ms 3336 KB Output is correct
22 Correct 100 ms 3432 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 716 KB Output is correct
2 Correct 12 ms 688 KB Output is correct
3 Correct 58 ms 732 KB Output is correct
4 Correct 60 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 11 ms 688 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 46 ms 720 KB Output is correct
11 Correct 61 ms 724 KB Output is correct
12 Correct 55 ms 720 KB Output is correct
13 Correct 32 ms 716 KB Output is correct
14 Correct 50 ms 716 KB Output is correct
15 Correct 48 ms 716 KB Output is correct
16 Correct 44 ms 716 KB Output is correct
17 Correct 108 ms 3452 KB Output is correct
18 Correct 119 ms 3468 KB Output is correct
19 Correct 107 ms 3404 KB Output is correct
20 Correct 53 ms 792 KB Output is correct
21 Correct 46 ms 716 KB Output is correct
22 Correct 11 ms 588 KB Output is correct
23 Correct 14 ms 588 KB Output is correct
24 Correct 1 ms 588 KB Output is correct
25 Correct 78 ms 3412 KB Output is correct
26 Correct 65 ms 3408 KB Output is correct
27 Correct 93 ms 3508 KB Output is correct
28 Correct 95 ms 3492 KB Output is correct
29 Correct 95 ms 3584 KB Output is correct
30 Correct 92 ms 3704 KB Output is correct
31 Correct 47 ms 716 KB Output is correct
32 Correct 24 ms 588 KB Output is correct
33 Correct 112 ms 2688 KB Output is correct
34 Correct 15 ms 588 KB Output is correct
35 Correct 122 ms 3420 KB Output is correct
36 Correct 0 ms 588 KB Output is correct
37 Correct 1 ms 588 KB Output is correct
38 Correct 75 ms 3404 KB Output is correct
39 Correct 78 ms 3408 KB Output is correct
40 Correct 107 ms 3404 KB Output is correct
41 Correct 96 ms 3404 KB Output is correct
42 Correct 101 ms 3512 KB Output is correct
43 Correct 1 ms 588 KB Output is correct
44 Correct 1 ms 588 KB Output is correct
45 Correct 1 ms 588 KB Output is correct
46 Correct 1 ms 588 KB Output is correct
47 Correct 0 ms 588 KB Output is correct
48 Correct 0 ms 588 KB Output is correct
49 Correct 102 ms 3552 KB Output is correct
50 Correct 97 ms 3448 KB Output is correct
51 Correct 100 ms 3336 KB Output is correct
52 Correct 100 ms 3432 KB Output is correct
53 Correct 100 ms 3376 KB Output is correct
54 Correct 112 ms 3412 KB Output is correct
55 Correct 105 ms 3404 KB Output is correct
56 Correct 61 ms 716 KB Output is correct
57 Correct 52 ms 724 KB Output is correct
58 Correct 73 ms 2632 KB Output is correct
59 Correct 86 ms 2808 KB Output is correct
60 Correct 105 ms 2636 KB Output is correct
61 Correct 76 ms 2648 KB Output is correct
62 Correct 96 ms 2624 KB Output is correct
63 Correct 109 ms 2680 KB Output is correct
64 Correct 123 ms 2912 KB Output is correct
65 Correct 129 ms 2892 KB Output is correct
66 Correct 167 ms 2932 KB Output is correct
67 Correct 12 ms 2364 KB Output is correct
68 Correct 67 ms 3392 KB Output is correct
69 Correct 65 ms 3372 KB Output is correct
70 Correct 114 ms 3420 KB Output is correct
71 Correct 105 ms 3396 KB Output is correct
72 Correct 96 ms 3404 KB Output is correct
73 Correct 96 ms 3444 KB Output is correct
74 Correct 94 ms 3484 KB Output is correct