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Submission #628844

# Submission time Handle Problem Language Result Execution time Memory
628844 2022-08-13T18:15:41 Z vovamr Autobus (COCI22_autobus) C++17
70 / 70
 549 ms 9800 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

inline void solve() {
	int n, m;
	cin >> n >> m;
	ve<ve<int>> c(n,ve<int>(n,iinf));
	for (int i = 0; i < m; ++i) {
		int v, u, w;
		cin >> v >> u >> w;
		chmin(c[--v][--u], w);
	}

	ve<ve<pii>> gr(n);
	for (int v = 0; v < n; ++v) {
		for (int u = 0; u < n; ++u) {
			if (c[v][u] == iinf) continue;
			gr[v].pb({u, c[v][u]});
		}
	}

	ve<ve<ve<ll>>>dist(n,ve<ve<ll>>(n,ve<ll>(n+1,inf)));
	for (int s = 0; s < n; ++s) {
		auto &d = dist[s];
		d[s][0] = 0;
		set<pair<int,pii>> st;
		st.insert({0, {s, 0}});
		while (sz(st)) {
			auto [v, c] = st.begin()->se;
			st.erase(st.begin());
			if (c == n) continue;
			for (auto &[to, w] : gr[v]) {
				if (d[to][c + 1] > d[v][c] + w) {
					st.erase({d[to][c + 1], {to, c + 1}});
					d[to][c + 1] = d[v][c] + w;
					st.insert({d[to][c + 1], {to, c + 1}});
				}
			}
		}
	}

	int k, q;
	cin >> k >> q;
	chmin(k, n);

	for (int s = 0; s < n; ++s) {
		for (int to = 0; to < n; ++to) {
			for (int t = 1; t <= n; ++t) {
				chmin(dist[s][to][t], dist[s][to][t - 1]);
			}
		}
	}

	while (q--) {
		int v, u;
		cin >> v >> u;
		ll ans = dist[--v][--u][k];
		if (ans == inf) ans = -1;
		cout << ans << '\n';
	}
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 3280 KB Output is correct
2 Correct 142 ms 3276 KB Output is correct
3 Correct 142 ms 3276 KB Output is correct
4 Correct 158 ms 3264 KB Output is correct
5 Correct 161 ms 3284 KB Output is correct
6 Correct 298 ms 3284 KB Output is correct
7 Correct 304 ms 3388 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 144 ms 3364 KB Output is correct
8 Correct 142 ms 3364 KB Output is correct
9 Correct 191 ms 3260 KB Output is correct
10 Correct 169 ms 3300 KB Output is correct
11 Correct 268 ms 3364 KB Output is correct
12 Correct 286 ms 3372 KB Output is correct
13 Correct 381 ms 9476 KB Output is correct
14 Correct 422 ms 9476 KB Output is correct
15 Correct 390 ms 9420 KB Output is correct
16 Correct 388 ms 9532 KB Output is correct
17 Correct 296 ms 9548 KB Output is correct
18 Correct 310 ms 9552 KB Output is correct
19 Correct 293 ms 9528 KB Output is correct
20 Correct 295 ms 9536 KB Output is correct
21 Correct 369 ms 9580 KB Output is correct
22 Correct 380 ms 9676 KB Output is correct
23 Correct 363 ms 9600 KB Output is correct
24 Correct 362 ms 9536 KB Output is correct
25 Correct 394 ms 9792 KB Output is correct
26 Correct 380 ms 9676 KB Output is correct
27 Correct 395 ms 9672 KB Output is correct
28 Correct 396 ms 9676 KB Output is correct
29 Correct 531 ms 9684 KB Output is correct
30 Correct 536 ms 9680 KB Output is correct
31 Correct 531 ms 9784 KB Output is correct
32 Correct 535 ms 9676 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 143 ms 3280 KB Output is correct
8 Correct 142 ms 3276 KB Output is correct
9 Correct 142 ms 3276 KB Output is correct
10 Correct 158 ms 3264 KB Output is correct
11 Correct 161 ms 3284 KB Output is correct
12 Correct 298 ms 3284 KB Output is correct
13 Correct 304 ms 3388 KB Output is correct
14 Correct 144 ms 3364 KB Output is correct
15 Correct 142 ms 3364 KB Output is correct
16 Correct 191 ms 3260 KB Output is correct
17 Correct 169 ms 3300 KB Output is correct
18 Correct 268 ms 3364 KB Output is correct
19 Correct 286 ms 3372 KB Output is correct
20 Correct 381 ms 9476 KB Output is correct
21 Correct 422 ms 9476 KB Output is correct
22 Correct 390 ms 9420 KB Output is correct
23 Correct 388 ms 9532 KB Output is correct
24 Correct 296 ms 9548 KB Output is correct
25 Correct 310 ms 9552 KB Output is correct
26 Correct 293 ms 9528 KB Output is correct
27 Correct 295 ms 9536 KB Output is correct
28 Correct 369 ms 9580 KB Output is correct
29 Correct 380 ms 9676 KB Output is correct
30 Correct 363 ms 9600 KB Output is correct
31 Correct 362 ms 9536 KB Output is correct
32 Correct 394 ms 9792 KB Output is correct
33 Correct 380 ms 9676 KB Output is correct
34 Correct 395 ms 9672 KB Output is correct
35 Correct 396 ms 9676 KB Output is correct
36 Correct 531 ms 9684 KB Output is correct
37 Correct 536 ms 9680 KB Output is correct
38 Correct 531 ms 9784 KB Output is correct
39 Correct 535 ms 9676 KB Output is correct
40 Correct 125 ms 3396 KB Output is correct
41 Correct 130 ms 3308 KB Output is correct
42 Correct 194 ms 3404 KB Output is correct
43 Correct 179 ms 3404 KB Output is correct
44 Correct 291 ms 3364 KB Output is correct
45 Correct 291 ms 3368 KB Output is correct
46 Correct 400 ms 9536 KB Output is correct
47 Correct 400 ms 9536 KB Output is correct
48 Correct 396 ms 9420 KB Output is correct
49 Correct 405 ms 9408 KB Output is correct
50 Correct 295 ms 9548 KB Output is correct
51 Correct 291 ms 9676 KB Output is correct
52 Correct 302 ms 9528 KB Output is correct
53 Correct 297 ms 9544 KB Output is correct
54 Correct 395 ms 9584 KB Output is correct
55 Correct 394 ms 9576 KB Output is correct
56 Correct 391 ms 9524 KB Output is correct
57 Correct 397 ms 9676 KB Output is correct
58 Correct 418 ms 9668 KB Output is correct
59 Correct 417 ms 9668 KB Output is correct
60 Correct 409 ms 9688 KB Output is correct
61 Correct 414 ms 9676 KB Output is correct
62 Correct 540 ms 9800 KB Output is correct
63 Correct 549 ms 9668 KB Output is correct
64 Correct 532 ms 9664 KB Output is correct
65 Correct 541 ms 9796 KB Output is correct