oj.uz

Submission #28524

# Submission time Handle Problem Language Result Execution time Memory
28524 2017-07-16T06:58:41 Z 三( ε:)(#1146, xdoju, veckal, unused) Alternative Mart (FXCUP2_mart) C++14
1 / 1
 3759 ms 50648 KB 
#include <cstdio>
#include <vector>
#include <queue>
#include <set>
using namespace std;
typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, int> li;
typedef pair<ll, ii> lii;

int main() {
	//freopen("input.txt", "r", stdin);
	int n, m, k, q;
	scanf("%d%d%d%d", &n, &m, &k, &q);
	vector<set<li>> dist(n); // (distance, from)
	vector<vector<ii>> adj(n); // (destination, weight)
	priority_queue<lii> pq; // (-distance, (here, -from))
	while (k--) {
		int s;
		scanf("%d", &s);
		--s;
		dist[s].emplace(0ll, s);
		pq.emplace(0ll, ii(s, -s));
	}
	while (m--) {
		int p, q, v;
		scanf("%d%d%d", &p, &q, &v);
		--p; --q;
		adj[p].emplace_back(q, v);
		adj[q].emplace_back(p, v);
	}
	while (!pq.empty()) {
		ll weight = -pq.top().first;
		int here = pq.top().second.first;
		int from = -pq.top().second.second;
		pq.pop();
		bool skip = false;
		bool hasFrom = false;
		for (li p : dist[here]) {
			if (p.second != from)
				continue;
			hasFrom = true;
			if (weight > p.first)
				skip = true;
			break;
		}
		if (skip || !hasFrom) continue;
		for (ii p : adj[here]) {
			int next = p.first;
			ll nweight = weight + p.second;
			bool skip = false;
			bool hasFrom = false;
			for (auto it = dist[next].begin(); it != dist[next].end(); ++it) {
				if (it->second != from) continue;
				hasFrom = true;
				if (it->first <= nweight)
					skip = true;
				else
					dist[next].erase(it);
				break;
			}
			if (!hasFrom && dist[next].size() >= 11) {
				int f = dist[next].rbegin()->second;
				ll d = dist[next].rbegin()->first;
				if (d < nweight || (d == nweight && f < from))
					skip = true;
				else
					dist[next].erase(--dist[next].end());
			}
			if (skip) continue;
			dist[next].emplace(nweight, from);
			pq.emplace(-nweight, ii(next, -from));
		}
	}
	while (q--) {
		int target, x;
		scanf("%d%d", &target, &x);
		--target;
		set<int> closed;
		while (x--) {
			int c;
			scanf("%d", &c);
			closed.insert(--c);
		}
		for (li p : dist[target]) {
			if (closed.find(p.second) == closed.end()) {
				printf("%d %lld\n", p.second + 1, p.first);
				break;
			}
		}
	}
	return 0;
}

Compilation message

mart.cpp: In function 'int main()':
mart.cpp:14:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &n, &m, &k, &q);
                                   ^
mart.cpp:20:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &s);
                  ^
mart.cpp:27:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &p, &q, &v);
                              ^
mart.cpp:77:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &target, &x);
                             ^
mart.cpp:82:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &c);
                   ^

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1940 KB Output is correct
2 Correct 0 ms 1940 KB Output is correct
3 Correct 0 ms 1940 KB Output is correct
4 Correct 0 ms 1940 KB Output is correct
5 Correct 0 ms 2072 KB Output is correct
6 Correct 0 ms 2072 KB Output is correct
7 Correct 3 ms 2336 KB Output is correct
8 Correct 3 ms 2336 KB Output is correct
9 Correct 69 ms 2992 KB Output is correct
10 Correct 19 ms 2908 KB Output is correct
11 Correct 63 ms 6084 KB Output is correct
12 Correct 53 ms 5932 KB Output is correct
13 Correct 839 ms 13800 KB Output is correct
14 Correct 789 ms 13848 KB Output is correct
15 Correct 119 ms 10636 KB Output is correct
16 Correct 99 ms 10208 KB Output is correct
17 Correct 1306 ms 39568 KB Output is correct
18 Correct 853 ms 38324 KB Output is correct
19 Correct 1349 ms 43736 KB Output is correct
20 Correct 1153 ms 41360 KB Output is correct
21 Correct 1993 ms 43712 KB Output is correct
22 Correct 1849 ms 41528 KB Output is correct
23 Correct 2033 ms 45760 KB Output is correct
24 Correct 2306 ms 43448 KB Output is correct
25 Correct 1999 ms 45760 KB Output is correct
26 Correct 1796 ms 43448 KB Output is correct
27 Correct 86 ms 10996 KB Output is correct
28 Correct 83 ms 10764 KB Output is correct
29 Correct 1926 ms 40904 KB Output is correct
30 Correct 1626 ms 39536 KB Output is correct
31 Correct 2366 ms 46032 KB Output is correct
32 Correct 2053 ms 42652 KB Output is correct
33 Correct 2136 ms 43844 KB Output is correct
34 Correct 3156 ms 46288 KB Output is correct
35 Correct 2456 ms 46024 KB Output is correct
36 Correct 2483 ms 46156 KB Output is correct
37 Correct 2936 ms 50384 KB Output is correct
38 Correct 2889 ms 46156 KB Output is correct
39 Correct 176 ms 11680 KB Output is correct
40 Correct 173 ms 11696 KB Output is correct
41 Correct 2376 ms 43372 KB Output is correct
42 Correct 2256 ms 43396 KB Output is correct
43 Correct 3153 ms 46540 KB Output is correct
44 Correct 3123 ms 46556 KB Output is correct
45 Correct 3409 ms 46552 KB Output is correct
46 Correct 2776 ms 46552 KB Output is correct
47 Correct 3169 ms 50648 KB Output is correct
48 Correct 3099 ms 50648 KB Output is correct
49 Correct 3546 ms 50648 KB Output is correct
50 Correct 3759 ms 50648 KB Output is correct
51 Correct 1396 ms 50648 KB Output is correct
52 Correct 1636 ms 50648 KB Output is correct
53 Correct 446 ms 41492 KB Output is correct
54 Correct 2626 ms 46264 KB Output is correct
55 Correct 2609 ms 46252 KB Output is correct
56 Correct 2503 ms 46516 KB Output is correct
57 Correct 529 ms 9012 KB Output is correct