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Submission #635977

# Submission time Handle Problem Language Result Execution time Memory
635977 2022-08-27T13:42:58 Z Arinoor Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 320 ms 3704 KB 
#include <bits/stdc++.h>
using namespace std;

#define ios				ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define pb				push_back
#define mp				make_pair
#define fi				first
#define se				second
#define all(x)			x.begin(), x.end()
#define bug(x)			cout << #x << " : " << x << '\n'
#define bug2(x, y)		cout << #x << ' ' << #y << " : " << x << ' ' << y << '\n'

typedef long long ll;
typedef pair<int, int> pii;

const int maxn = 2e2 + 10;
const int maxm = 5e4 + 10;
const int mod = 1e9 + 7;
const int inf = 2e9 + 10;

int n, m;
int u[maxm], v[maxm], c[maxm], f[maxm];
int d[2][2][maxn][maxn];
int par[2][2][maxn];
bool mark[maxn];
vector<int> G[maxn][2];

int ant(int e, int v){
	return ::v[e] + ::u[e] - v;
}

void dijkstra(int src, bool st, bool eg, int s){
	int (&d)[maxn] = ::d[st][eg][s];
	int (&p)[maxn] = par[st][eg];
	fill_n(d, maxn, inf);
	memset(mark, 0, sizeof mark);
	if(!s)
		memset(p, -1, sizeof p);
	d[src] = 0;
	while(true){
		int v = -1, h = inf;
		for(int i = 1; i <= n; i ++)
			if(!mark[i] and d[i] < h)
				v = i, h = d[i];
		if(v == -1) return;
		mark[v] = true;
		for(int e : G[v][eg]){
			int u = ant(e, v);
			int res = min((ll)h + c[e], (ll)inf);
			if(res < d[u]){
				d[u] = res;
				if(!s)
					p[u] = e;
			}
		}
	}
}

int main(){
	ios;
	cin >> n >> m;
	for(int i = 0; i < m; i ++){
		int u, v, c, f;
		cin >> u >> v >> c >> f;
		G[u][0].pb(i);
		G[v][1].pb(i);
		::u[i] = u;
		::v[i] = v;
		::c[i] = c;
		::f[i] = f;
	}
	for(int i = 0; i <= 1; i ++){
		dijkstra(1, 0, i, 0);
		dijkstra(n, 1, i, 0);
	}
	for(int i = 0; i <= 1; i ++){
		for(int j = 0; j <= 1; j ++){
			for(int v = 1; v <= n; v ++){
				int e = par[i][j][v];
				if(~e){
					int x = c[e];
					c[e] = inf;
					dijkstra(i ? n : 1, i, j, v);
					c[e] = x;
				}
			}
		}
	}
	ll ans = (ll)d[0][0][0][n] + d[1][0][0][1];
	for(int i = 0; i < m; i ++){
		int u = ::u[i];
		int v = ::v[i];
		int c = ::c[i];
		int f = ::f[i];
		int state[2][2];
		for(int j = 0; j <= 1; j ++){
			state[j][0] = i == par[j][0][v] ? v : 0;
			state[j][1] = i == par[j][1][u] ? u : 0;
		}
		int (&d1_out)[maxn] = d[0][0][state[0][0]];
		int (&d1_in)[maxn] = d[0][1][state[0][1]];
		int (&dn_out)[maxn] = d[1][0][state[1][0]];
		int (&dn_in)[maxn] = d[1][1][state[1][1]];
		ll res1 = min((ll)d1_out[n], (ll)d1_out[v] + c + dn_in[u]);
		ll resn = min((ll)dn_out[1], (ll)dn_out[v] + c + d1_in[u]);
		ans = min(ans, res1 + resn + f);
	}
	if(ans >= inf)
		ans = -1;
	cout << ans << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 1028 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 79 ms 1020 KB Output is correct
4 Correct 82 ms 1068 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 6 ms 724 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 87 ms 944 KB Output is correct
11 Correct 82 ms 944 KB Output is correct
12 Correct 83 ms 952 KB Output is correct
13 Correct 17 ms 980 KB Output is correct
14 Correct 50 ms 1024 KB Output is correct
15 Correct 49 ms 996 KB Output is correct
16 Correct 50 ms 1040 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 3328 KB Output is correct
2 Correct 226 ms 3404 KB Output is correct
3 Correct 229 ms 3516 KB Output is correct
4 Correct 80 ms 1024 KB Output is correct
5 Correct 63 ms 956 KB Output is correct
6 Correct 17 ms 708 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 65 ms 3512 KB Output is correct
10 Correct 57 ms 3592 KB Output is correct
11 Correct 148 ms 3492 KB Output is correct
12 Correct 149 ms 3704 KB Output is correct
13 Correct 140 ms 3688 KB Output is correct
14 Correct 143 ms 3572 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 984 KB Output is correct
2 Correct 13 ms 848 KB Output is correct
3 Correct 150 ms 2792 KB Output is correct
4 Correct 7 ms 824 KB Output is correct
5 Correct 198 ms 3268 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 54 ms 3340 KB Output is correct
9 Correct 58 ms 3348 KB Output is correct
10 Correct 134 ms 3284 KB Output is correct
11 Correct 126 ms 3296 KB Output is correct
12 Correct 124 ms 3296 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 143 ms 3408 KB Output is correct
20 Correct 136 ms 3312 KB Output is correct
21 Correct 126 ms 3276 KB Output is correct
22 Correct 131 ms 3292 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 1028 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 79 ms 1020 KB Output is correct
4 Correct 82 ms 1068 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 6 ms 724 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 87 ms 944 KB Output is correct
11 Correct 82 ms 944 KB Output is correct
12 Correct 83 ms 952 KB Output is correct
13 Correct 17 ms 980 KB Output is correct
14 Correct 50 ms 1024 KB Output is correct
15 Correct 49 ms 996 KB Output is correct
16 Correct 50 ms 1040 KB Output is correct
17 Correct 216 ms 3328 KB Output is correct
18 Correct 226 ms 3404 KB Output is correct
19 Correct 229 ms 3516 KB Output is correct
20 Correct 80 ms 1024 KB Output is correct
21 Correct 63 ms 956 KB Output is correct
22 Correct 17 ms 708 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 65 ms 3512 KB Output is correct
26 Correct 57 ms 3592 KB Output is correct
27 Correct 148 ms 3492 KB Output is correct
28 Correct 149 ms 3704 KB Output is correct
29 Correct 140 ms 3688 KB Output is correct
30 Correct 143 ms 3572 KB Output is correct
31 Correct 74 ms 984 KB Output is correct
32 Correct 13 ms 848 KB Output is correct
33 Correct 150 ms 2792 KB Output is correct
34 Correct 7 ms 824 KB Output is correct
35 Correct 198 ms 3268 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 0 ms 340 KB Output is correct
38 Correct 54 ms 3340 KB Output is correct
39 Correct 58 ms 3348 KB Output is correct
40 Correct 134 ms 3284 KB Output is correct
41 Correct 126 ms 3296 KB Output is correct
42 Correct 124 ms 3296 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 336 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 143 ms 3408 KB Output is correct
50 Correct 136 ms 3312 KB Output is correct
51 Correct 126 ms 3276 KB Output is correct
52 Correct 131 ms 3292 KB Output is correct
53 Correct 220 ms 3396 KB Output is correct
54 Correct 261 ms 3332 KB Output is correct
55 Correct 252 ms 3340 KB Output is correct
56 Correct 79 ms 972 KB Output is correct
57 Correct 80 ms 1028 KB Output is correct
58 Correct 186 ms 2940 KB Output is correct
59 Correct 198 ms 2836 KB Output is correct
60 Correct 230 ms 2808 KB Output is correct
61 Correct 201 ms 2800 KB Output is correct
62 Correct 191 ms 2832 KB Output is correct
63 Correct 199 ms 2868 KB Output is correct
64 Correct 320 ms 2996 KB Output is correct
65 Correct 301 ms 3020 KB Output is correct
66 Correct 274 ms 3000 KB Output is correct
67 Correct 13 ms 2256 KB Output is correct
68 Correct 59 ms 3516 KB Output is correct
69 Correct 59 ms 3504 KB Output is correct
70 Correct 149 ms 3572 KB Output is correct
71 Correct 163 ms 3552 KB Output is correct
72 Correct 158 ms 3508 KB Output is correct
73 Correct 159 ms 3556 KB Output is correct
74 Correct 156 ms 3660 KB Output is correct