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Submission #1046341

# Submission time Handle Problem Language Result Execution time Memory
1046341 2024-08-06T13:15:02 Z xnqs Cheap flights (LMIO18_pigus_skrydziai) C++17
28 / 100
 3000 ms 49604 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <set>
 
int gs, edg;
std::vector<std::set<std::pair<int,int>>> adj_list;
 
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	std::cout.tie(NULL);
 
	std::cin >> gs >> edg;
	adj_list.resize(gs+1);
 
	std::priority_queue<int> q;
	for (int i = 0, a, b, c; i < edg; i++) {
		std::cin >> a >> b >> c;
		adj_list[a].emplace(b,c);
		adj_list[b].emplace(a,c);
		q.emplace(c);
	}
 
	int64_t max_tri = 0;
	for (int cnt = 0; !q.empty() && cnt < 3; cnt++) {
		max_tri += q.top();
		q.pop();
	}
 
	// try all star graphs
	int64_t ans = 0;
	for (int i = 1; i <= gs; i++) {
		int64_t cand = 0;
		for (const auto& [j, w] : adj_list[i]) {
			cand += w;
		}
		ans = std::max(ans,cand);
	}
 
	// try all "triangle" cycles
	if (ans<=max_tri)
	for (int i = 1; i <= gs; i++) {
		if (adj_list[i].size()>300) {
			continue;
		}
		for (const auto& [j, wj] : adj_list[i]) {
			if (j<i) {
				continue;
			}
			for (const auto& [k, wk] : adj_list[j]) {
				if (k<j) {
					continue;
				}
				if (k==i) {
					continue;
				}
 
				auto it = adj_list[k].lower_bound(std::pair<int,int>(i,0));
				if (it!=adj_list[k].end()&&it->first==i) {
					//std::cout << i << " " << j << " " << k << "\n";
					//std::cout << wj << " " << wk << " " << it->second << "\n";
					ans = std::max(ans, static_cast<int64_t>(wj)+wk+it->second);
				}
			}
		}
	}
 
	std::cout << ans << "\n";
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2392 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 2392 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 562 ms 49604 KB Output is correct
23 Correct 192 ms 49344 KB Output is correct
24 Correct 32 ms 2392 KB Output is correct
25 Correct 4 ms 860 KB Output is correct
26 Correct 4 ms 860 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 139 ms 19932 KB Output is correct
29 Correct 43 ms 8192 KB Output is correct
30 Correct 79 ms 12636 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 184 ms 48472 KB Output is correct
34 Execution timed out 3074 ms 44528 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 29128 KB Output is correct
2 Correct 156 ms 43716 KB Output is correct
3 Correct 30 ms 14740 KB Output is correct
4 Correct 86 ms 28728 KB Output is correct
5 Correct 162 ms 39200 KB Output is correct
6 Correct 34 ms 12500 KB Output is correct
7 Correct 51 ms 37576 KB Output is correct
8 Correct 65 ms 43716 KB Output is correct
9 Correct 3 ms 14424 KB Output is correct
10 Correct 31 ms 12668 KB Output is correct
11 Correct 84 ms 36648 KB Output is correct
12 Correct 64 ms 24776 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 54 ms 10292 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 29128 KB Output is correct
2 Correct 156 ms 43716 KB Output is correct
3 Correct 30 ms 14740 KB Output is correct
4 Correct 86 ms 28728 KB Output is correct
5 Correct 162 ms 39200 KB Output is correct
6 Correct 34 ms 12500 KB Output is correct
7 Correct 51 ms 37576 KB Output is correct
8 Correct 65 ms 43716 KB Output is correct
9 Correct 3 ms 14424 KB Output is correct
10 Correct 31 ms 12668 KB Output is correct
11 Correct 84 ms 36648 KB Output is correct
12 Correct 64 ms 24776 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 54 ms 10292 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 6 ms 2392 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 344 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 2 ms 604 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 562 ms 49604 KB Output is correct
37 Correct 192 ms 49344 KB Output is correct
38 Correct 32 ms 2392 KB Output is correct
39 Correct 4 ms 860 KB Output is correct
40 Correct 4 ms 860 KB Output is correct
41 Correct 1 ms 604 KB Output is correct
42 Correct 139 ms 19932 KB Output is correct
43 Correct 43 ms 8192 KB Output is correct
44 Correct 79 ms 12636 KB Output is correct
45 Correct 0 ms 344 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 184 ms 48472 KB Output is correct
48 Execution timed out 3074 ms 44528 KB Time limit exceeded
49 Halted 0 ms 0 KB -