oj.uz

Submission #287334

# Submission time Handle Problem Language Result Execution time Memory
287334 2020-08-31T15:47:34 Z reymontada61 Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 466 ms 4216 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
int n, m;
const int MXN = 205, MXM = 50005;

int apsp[MXN][MXN];
int eds[MXM][4];

vector<int> adj[MXN];
int mxh = INT_MAX * 1000ll;

int dist(int src, int dest, int skip) {
	int dists[MXN];
	for (int i=0; i<MXN; i++) dists[i] = mxh;
	priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> proc;
	proc.push({0, src});
	while (!proc.empty()) {
		auto x = proc.top(); proc.pop();
		int di = x.first, no = x.second;
		if (dists[no] < di) continue;
		dists[no] = di;
		for (auto ed: adj[no]) {
			if (ed != skip) {
				int ot = eds[ed][0] + eds[ed][1] - no;
				int we = eds[ed][2];
				if (dists[ot] > dists[no] + we) {
					dists[ot] = dists[no] + we;
					proc.push({dists[ot], ot});
				}
			}
		}
		if (no == eds[skip][1]) {
			int ot = eds[skip][0];
			int od = dists[no] + eds[skip][2];
			if (dists[ot] > od) {
				dists[ot] = od;
				proc.push({od, ot});
			}
		}
	}
	return dists[dest];
} 

signed main() {
	
	for (int i=0; i<MXN; i++) {
		for (int j=0; j<MXN; j++) {
			apsp[i][j] = mxh;
		}
		apsp[i][i] = 0;
	}
	
	cin >> n >> m;
	for (int i=0; i<m; i++) {
		int a, b, w, c;
		cin >> a >> b >> w >> c;
		eds[i][0] = a;
		eds[i][1] = b;
		eds[i][2] = w;
		eds[i][3] = c;
		adj[a].push_back(i);
		apsp[a][b] = min(apsp[a][b], w);
	}
	
	for (int k=1; k<=n; k++) {
		for (int i=1; i<=n; i++) {
			for (int j=1; j<=n; j++) {
				if (apsp[i][k] + apsp[k][j] < apsp[i][j]) {
					apsp[i][j] = apsp[i][k] + apsp[k][j];
				}
			}
		}
	}
	
	int res = apsp[1][n] + apsp[n][1];
	for (int i=0; i<m; i++) {
		int a = eds[i][0], b = eds[i][1];
		int w = eds[i][2], c = eds[i][3];
		int d1 = min(apsp[1][n], apsp[1][b] + w + apsp[a][n]);
		int d2 = min(apsp[n][1], apsp[n][b] + w + apsp[a][1]);
		if (d1 + c + d2 < res) {
			int actual = dist(1, n, i) + dist(n, 1, i) + c;
			res = min(res, actual);
		}
	}
	
	if (res >= mxh) cout << -1 << endl;
	else cout << res << endl;
	
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 768 KB Output is correct
2 Correct 10 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 13 ms 768 KB Output is correct
5 Correct 3 ms 768 KB Output is correct
6 Correct 10 ms 768 KB Output is correct
7 Correct 1 ms 640 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 17 ms 768 KB Output is correct
11 Correct 27 ms 768 KB Output is correct
12 Correct 14 ms 768 KB Output is correct
13 Correct 13 ms 768 KB Output is correct
14 Correct 12 ms 768 KB Output is correct
15 Correct 13 ms 800 KB Output is correct
16 Correct 12 ms 896 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 3832 KB Output is correct
2 Correct 113 ms 3832 KB Output is correct
3 Correct 124 ms 4084 KB Output is correct
4 Correct 17 ms 768 KB Output is correct
5 Correct 12 ms 768 KB Output is correct
6 Correct 10 ms 640 KB Output is correct
7 Correct 10 ms 724 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 130 ms 3960 KB Output is correct
10 Correct 129 ms 3960 KB Output is correct
11 Correct 130 ms 4092 KB Output is correct
12 Correct 126 ms 4088 KB Output is correct
13 Correct 123 ms 4088 KB Output is correct
14 Correct 125 ms 4216 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 776 KB Output is correct
2 Correct 9 ms 640 KB Output is correct
3 Correct 86 ms 3064 KB Output is correct
4 Correct 10 ms 640 KB Output is correct
5 Correct 105 ms 3704 KB Output is correct
6 Correct 1 ms 640 KB Output is correct
7 Correct 1 ms 640 KB Output is correct
8 Correct 110 ms 3704 KB Output is correct
9 Correct 115 ms 3808 KB Output is correct
10 Correct 107 ms 3704 KB Output is correct
11 Correct 118 ms 3728 KB Output is correct
12 Correct 108 ms 3832 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 672 KB Output is correct
17 Correct 1 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 104 ms 3808 KB Output is correct
20 Correct 108 ms 3704 KB Output is correct
21 Correct 105 ms 3704 KB Output is correct
22 Correct 104 ms 3832 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 768 KB Output is correct
2 Correct 10 ms 640 KB Output is correct
3 Correct 13 ms 768 KB Output is correct
4 Correct 13 ms 768 KB Output is correct
5 Correct 3 ms 768 KB Output is correct
6 Correct 10 ms 768 KB Output is correct
7 Correct 1 ms 640 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 17 ms 768 KB Output is correct
11 Correct 27 ms 768 KB Output is correct
12 Correct 14 ms 768 KB Output is correct
13 Correct 13 ms 768 KB Output is correct
14 Correct 12 ms 768 KB Output is correct
15 Correct 13 ms 800 KB Output is correct
16 Correct 12 ms 896 KB Output is correct
17 Correct 115 ms 3832 KB Output is correct
18 Correct 113 ms 3832 KB Output is correct
19 Correct 124 ms 4084 KB Output is correct
20 Correct 17 ms 768 KB Output is correct
21 Correct 12 ms 768 KB Output is correct
22 Correct 10 ms 640 KB Output is correct
23 Correct 10 ms 724 KB Output is correct
24 Correct 1 ms 640 KB Output is correct
25 Correct 130 ms 3960 KB Output is correct
26 Correct 129 ms 3960 KB Output is correct
27 Correct 130 ms 4092 KB Output is correct
28 Correct 126 ms 4088 KB Output is correct
29 Correct 123 ms 4088 KB Output is correct
30 Correct 125 ms 4216 KB Output is correct
31 Correct 11 ms 776 KB Output is correct
32 Correct 9 ms 640 KB Output is correct
33 Correct 86 ms 3064 KB Output is correct
34 Correct 10 ms 640 KB Output is correct
35 Correct 105 ms 3704 KB Output is correct
36 Correct 1 ms 640 KB Output is correct
37 Correct 1 ms 640 KB Output is correct
38 Correct 110 ms 3704 KB Output is correct
39 Correct 115 ms 3808 KB Output is correct
40 Correct 107 ms 3704 KB Output is correct
41 Correct 118 ms 3728 KB Output is correct
42 Correct 108 ms 3832 KB Output is correct
43 Correct 1 ms 640 KB Output is correct
44 Correct 1 ms 640 KB Output is correct
45 Correct 1 ms 640 KB Output is correct
46 Correct 1 ms 672 KB Output is correct
47 Correct 1 ms 640 KB Output is correct
48 Correct 1 ms 640 KB Output is correct
49 Correct 104 ms 3808 KB Output is correct
50 Correct 108 ms 3704 KB Output is correct
51 Correct 105 ms 3704 KB Output is correct
52 Correct 104 ms 3832 KB Output is correct
53 Correct 118 ms 3896 KB Output is correct
54 Correct 112 ms 3832 KB Output is correct
55 Correct 113 ms 3832 KB Output is correct
56 Correct 13 ms 768 KB Output is correct
57 Correct 14 ms 768 KB Output is correct
58 Correct 99 ms 3192 KB Output is correct
59 Correct 99 ms 3196 KB Output is correct
60 Correct 103 ms 3196 KB Output is correct
61 Correct 103 ms 3192 KB Output is correct
62 Correct 141 ms 3192 KB Output is correct
63 Correct 195 ms 3192 KB Output is correct
64 Correct 155 ms 3660 KB Output is correct
65 Correct 293 ms 3684 KB Output is correct
66 Correct 466 ms 3672 KB Output is correct
67 Correct 82 ms 3188 KB Output is correct
68 Correct 130 ms 3964 KB Output is correct
69 Correct 127 ms 3960 KB Output is correct
70 Correct 124 ms 3960 KB Output is correct
71 Correct 124 ms 3960 KB Output is correct
72 Correct 126 ms 3960 KB Output is correct
73 Correct 125 ms 4088 KB Output is correct
74 Correct 126 ms 3964 KB Output is correct