Submission #28484

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
28484	2017-07-16T06:31:01 Z	三( ε:)(#1146, xdoju, veckal, unused)	Alternative Mart (FXCUP2_mart)	C++14	0 / 1	1856 ms	36320 KB

mart

#include <cstdio>
#include <vector>
#include <queue>
#include <set>
using namespace std;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;

int main() {
	//freopen("input.txt", "r", stdin);
	int n, m, k, q;
	scanf("%d%d%d%d", &n, &m, &k, &q);
	vector<set<ii>> dist(n); // (distance, from)
	vector<vector<ii>> adj(n); // (destination, weight)
	priority_queue<iii> pq; // (-distance, (here, from))
	while (k--) {
		int s;
		scanf("%d", &s);
		--s;
		dist[s].emplace(0, s);
		pq.emplace(0, 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()) {
		int 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 (ii 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;
			int 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) {
				if (dist[next].rbegin()->first <= nweight)
					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 (ii p : dist[target]) {
			if (closed.find(p.second) == closed.end()) {
				printf("%d %d\n", p.second + 1, p.first);
				break;
			}
		}
	}
	return 0;
}

Compilation message

mart.cpp: In function 'int main()':
mart.cpp:12:35: 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:18:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &s);
                  ^
mart.cpp:25:30: 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:73:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &target, &x);
                             ^
mart.cpp:78:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &c);
                   ^

Subtask #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	1940 KB	Output is correct
6	Correct	0 ms	1940 KB	Output is correct
7	Correct	3 ms	2336 KB	Output is correct
8	Correct	3 ms	2204 KB	Output is correct
9	Correct	63 ms	2848 KB	Output is correct
10	Correct	16 ms	2664 KB	Output is correct
11	Correct	56 ms	5140 KB	Output is correct
12	Correct	53 ms	5008 KB	Output is correct
13	Correct	816 ms	11380 KB	Output is correct
14	Correct	956 ms	11428 KB	Output is correct
15	Correct	133 ms	9752 KB	Output is correct
16	Correct	116 ms	9416 KB	Output is correct
17	Correct	1409 ms	31576 KB	Output is correct
18	Correct	843 ms	30536 KB	Output is correct
19	Correct	1646 ms	34716 KB	Output is correct
20	Correct	1166 ms	32780 KB	Output is correct
21	Correct	1856 ms	34716 KB	Output is correct
22	Correct	1646 ms	32856 KB	Output is correct
23	Correct	1676 ms	36136 KB	Output is correct
24	Correct	1856 ms	34336 KB	Output is correct
25	Correct	1219 ms	36136 KB	Output is correct
26	Correct	1276 ms	34336 KB	Output is correct
27	Correct	129 ms	10248 KB	Output is correct
28	Correct	133 ms	9960 KB	Output is correct
29	Correct	1726 ms	32692 KB	Output is correct
30	Correct	1769 ms	31504 KB	Output is correct
31	Incorrect	1809 ms	36320 KB	Output isn't correct
32	Halted	0 ms	0 KB	-