Submission #28500

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
28500	2017-07-16T06:45:09 Z	三( ε:)(#1146, xdoju, veckal, unused)	Alternative Mart (FXCUP2_mart)	C++14	0 / 1	2426 ms	46032 KB

mart

#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) {
				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 (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:75:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &target, &x);
                             ^
mart.cpp:80:19: 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	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	6 ms	2336 KB	Output is correct
9	Correct	69 ms	2992 KB	Output is correct
10	Correct	23 ms	2908 KB	Output is correct
11	Correct	66 ms	6084 KB	Output is correct
12	Correct	56 ms	5932 KB	Output is correct
13	Correct	833 ms	13800 KB	Output is correct
14	Correct	883 ms	13848 KB	Output is correct
15	Correct	79 ms	10636 KB	Output is correct
16	Correct	66 ms	10208 KB	Output is correct
17	Correct	1253 ms	39568 KB	Output is correct
18	Correct	856 ms	38324 KB	Output is correct
19	Correct	1909 ms	43736 KB	Output is correct
20	Correct	1369 ms	41360 KB	Output is correct
21	Correct	1826 ms	43712 KB	Output is correct
22	Correct	1896 ms	41528 KB	Output is correct
23	Correct	2209 ms	45760 KB	Output is correct
24	Correct	2186 ms	43448 KB	Output is correct
25	Correct	1953 ms	45760 KB	Output is correct
26	Correct	2059 ms	43448 KB	Output is correct
27	Correct	149 ms	10996 KB	Output is correct
28	Correct	119 ms	10764 KB	Output is correct
29	Correct	1966 ms	40904 KB	Output is correct
30	Correct	1676 ms	39536 KB	Output is correct
31	Incorrect	2426 ms	46032 KB	Output isn't correct
32	Halted	0 ms	0 KB	-