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Submission #210514

# Submission time Handle Problem Language Result Execution time Memory
210514 2020-03-17T14:33:59 Z islingr Commuter Pass (JOI18_commuter_pass) C++14
100 / 100
 637 ms 23268 KB 
#include <iostream>
#include <vector>

using namespace std;

#define rep(i, a, b) for (auto i = (a); i < (b); ++i)
#define trav(x, v) for (auto &x : v)

#define eb(x...) emplace_back(x)
#define ff first
#define ss second

using ll = int64_t;
using vl = vector<ll>;
using pii = pair<int, int>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;

template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

const int N = 1 << 17;
const ll inf = 1e18;
vector<pii> g[N];

#include <ext/pb_ds/priority_queue.hpp>
using namespace __gnu_pbds;
using pq = __gnu_pbds::priority_queue<pli, greater<pli>, thin_heap_tag>;

int n;

vl dij(int s) {
	vl dist(n, inf); dist[s] = 0; pq q;
	vector<pq::point_iterator> it(n);
	rep(i, 0, n) it[i] = q.push({dist[i], i});
	while (!q.empty()) {
		int u = q.top().ss; q.pop();
		trav(e, g[u])
			if (ckmin(dist[e.ff], dist[u] + e.ss))
				q.modify(it[e.ff], {dist[e.ff], e.ff});
	}
	return dist;
}

ll mx[N], my[N];
vl ds, dx, dy;

pll dfs(int u) {
	if (mx[u] == inf) {
		mx[u] = dx[u]; my[u] = dy[u];
		trav(e, g[u]) {
			if (ds[u] < ds[e.ff] + e.ss) continue;
			auto dv = dfs(e.ff);
			if (dx[u] + dv.ss < mx[u] + my[u])
				mx[u] = dx[u], my[u] = dv.ss;
			if (dv.ff + dy[u] < mx[u] + my[u])
				mx[u] = dv.ff, my[u] = dy[u];
			if (dv.ff + dv.ss < mx[u] + my[u])
				mx[u] = dv.ff, my[u] = dv.ss;
		}
	}
	return {mx[u], my[u]};
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int m, s, t, x, y; cin >> n >> m >> s >> t >> x >> y; --s; --t; --x; --y;
	while (m--) {
		int u, v, w; cin >> u >> v >> w; --u; --v;
		g[u].eb(v, w); g[v].eb(u, w);
	}
	ds = dij(s); dx = dij(x); dy = dij(y);
	rep(u, 0, n) mx[u] = my[u] = inf;
	cout << min(dx[y], dfs(t).ff + dfs(t).ss);
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 603 ms 18872 KB Output is correct
2 Correct 536 ms 18872 KB Output is correct
3 Correct 539 ms 18844 KB Output is correct
4 Correct 578 ms 18860 KB Output is correct
5 Correct 519 ms 18848 KB Output is correct
6 Correct 613 ms 18844 KB Output is correct
7 Correct 510 ms 18860 KB Output is correct
8 Correct 507 ms 22312 KB Output is correct
9 Correct 618 ms 23124 KB Output is correct
10 Correct 536 ms 23268 KB Output is correct
11 Correct 361 ms 18024 KB Output is correct
12 Correct 637 ms 23076 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 578 ms 18888 KB Output is correct
2 Correct 552 ms 22364 KB Output is correct
3 Correct 548 ms 22356 KB Output is correct
4 Correct 545 ms 22352 KB Output is correct
5 Correct 550 ms 22364 KB Output is correct
6 Correct 528 ms 22664 KB Output is correct
7 Correct 551 ms 22308 KB Output is correct
8 Correct 546 ms 22248 KB Output is correct
9 Correct 525 ms 22356 KB Output is correct
10 Correct 581 ms 22476 KB Output is correct
11 Correct 354 ms 18024 KB Output is correct
12 Correct 539 ms 22576 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 4088 KB Output is correct
2 Correct 7 ms 3448 KB Output is correct
3 Correct 8 ms 3448 KB Output is correct
4 Correct 22 ms 4736 KB Output is correct
5 Correct 14 ms 4088 KB Output is correct
6 Correct 9 ms 3448 KB Output is correct
7 Correct 8 ms 3448 KB Output is correct
8 Correct 8 ms 3580 KB Output is correct
9 Correct 8 ms 3448 KB Output is correct
10 Correct 14 ms 4088 KB Output is correct
11 Correct 7 ms 3448 KB Output is correct
12 Correct 7 ms 3448 KB Output is correct
13 Correct 7 ms 3448 KB Output is correct
14 Correct 7 ms 3448 KB Output is correct
15 Correct 7 ms 3448 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 603 ms 18872 KB Output is correct
2 Correct 536 ms 18872 KB Output is correct
3 Correct 539 ms 18844 KB Output is correct
4 Correct 578 ms 18860 KB Output is correct
5 Correct 519 ms 18848 KB Output is correct
6 Correct 613 ms 18844 KB Output is correct
7 Correct 510 ms 18860 KB Output is correct
8 Correct 507 ms 22312 KB Output is correct
9 Correct 618 ms 23124 KB Output is correct
10 Correct 536 ms 23268 KB Output is correct
11 Correct 361 ms 18024 KB Output is correct
12 Correct 637 ms 23076 KB Output is correct
13 Correct 578 ms 18888 KB Output is correct
14 Correct 552 ms 22364 KB Output is correct
15 Correct 548 ms 22356 KB Output is correct
16 Correct 545 ms 22352 KB Output is correct
17 Correct 550 ms 22364 KB Output is correct
18 Correct 528 ms 22664 KB Output is correct
19 Correct 551 ms 22308 KB Output is correct
20 Correct 546 ms 22248 KB Output is correct
21 Correct 525 ms 22356 KB Output is correct
22 Correct 581 ms 22476 KB Output is correct
23 Correct 354 ms 18024 KB Output is correct
24 Correct 539 ms 22576 KB Output is correct
25 Correct 15 ms 4088 KB Output is correct
26 Correct 7 ms 3448 KB Output is correct
27 Correct 8 ms 3448 KB Output is correct
28 Correct 22 ms 4736 KB Output is correct
29 Correct 14 ms 4088 KB Output is correct
30 Correct 9 ms 3448 KB Output is correct
31 Correct 8 ms 3448 KB Output is correct
32 Correct 8 ms 3580 KB Output is correct
33 Correct 8 ms 3448 KB Output is correct
34 Correct 14 ms 4088 KB Output is correct
35 Correct 7 ms 3448 KB Output is correct
36 Correct 7 ms 3448 KB Output is correct
37 Correct 7 ms 3448 KB Output is correct
38 Correct 7 ms 3448 KB Output is correct
39 Correct 7 ms 3448 KB Output is correct
40 Correct 543 ms 22788 KB Output is correct
41 Correct 613 ms 23080 KB Output is correct
42 Correct 632 ms 23124 KB Output is correct
43 Correct 380 ms 18024 KB Output is correct
44 Correct 373 ms 18024 KB Output is correct
45 Correct 545 ms 22316 KB Output is correct
46 Correct 529 ms 22044 KB Output is correct
47 Correct 599 ms 22684 KB Output is correct
48 Correct 360 ms 17500 KB Output is correct
49 Correct 502 ms 22392 KB Output is correct
50 Correct 540 ms 22232 KB Output is correct
51 Correct 532 ms 22312 KB Output is correct