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Submission #205884

# Submission time Handle Problem Language Result Execution time Memory
205884 2020-03-01T09:52:15 Z mraron Cheap flights (LMIO18_pigus_skrydziai) C++14
28 / 100
 3000 ms 29304 KB 
#include<bits/stdc++.h>
using namespace std;
int n,m;
typedef long long ll;

vector<pair<int, ll>> adj[300001];
ll cost(int a, int b) {
	if(adj[a].size()>adj[b].size()) swap(a,b);
	auto it=lower_bound(adj[a].begin(),adj[a].end(), make_pair(b,0LL));
	if(it==adj[a].end() || it->first!=b) return 0;
	return it->second;
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>m;
	for(int i=0;i<m;++i) {
		int a,b,c;
		cin>>a>>b>>c;
		adj[a].push_back({b,c});
		adj[b].push_back({a,c});
	}
	ll ans=0;
	for(int i=1;i<=n;++i) {
		ll cans=0;
		for(auto j:adj[i]) {
			cans+=j.second;
		}
		ans=max(ans, cans);
		sort(adj[i].begin(),adj[i].end());
	}
	
	const int lim=700;
	for(int i=1;i<=n;++i) {
		if(adj[i].size()<=lim) {
			for(int j=0;j<adj[i].size();++j) {
				for(int k=j+1;k<adj[i].size();++k) {
					ans=max(ans, adj[i][j].second+adj[i][k].second+cost(adj[i][j].first, adj[i][k].first));
				}
			}
		}else {
			vector<int> kell(n+1);
			for(auto j:adj[i]) {
				kell[j.first]=j.second;
			}
			for(auto j:adj[i]) {
				for(auto k:adj[j.first]) {
					if(kell[k.first]) ans=max(ans, k.second+j.second+kell[k.first]);
				}
			}
		}
	}
	cout<<ans<<"\n";
	return 0;
}

Compilation message

pigus_skrydziai.cpp: In function 'int main()':
pigus_skrydziai.cpp:37:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<adj[i].size();++j) {
                ~^~~~~~~~~~~~~~
pigus_skrydziai.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int k=j+1;k<adj[i].size();++k) {
                   ~^~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 9 ms 7416 KB Output is correct
3 Correct 10 ms 7416 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 99 ms 8184 KB Output is correct
7 Correct 9 ms 7420 KB Output is correct
8 Correct 10 ms 7544 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 10 ms 7416 KB Output is correct
11 Correct 10 ms 7416 KB Output is correct
12 Correct 9 ms 7544 KB Output is correct
13 Correct 11 ms 7416 KB Output is correct
14 Correct 9 ms 7416 KB Output is correct
15 Correct 9 ms 7416 KB Output is correct
16 Correct 10 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 10 ms 7416 KB Output is correct
19 Correct 11 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7544 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 9 ms 7416 KB Output is correct
3 Correct 10 ms 7416 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 99 ms 8184 KB Output is correct
7 Correct 9 ms 7420 KB Output is correct
8 Correct 10 ms 7544 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 10 ms 7416 KB Output is correct
11 Correct 10 ms 7416 KB Output is correct
12 Correct 9 ms 7544 KB Output is correct
13 Correct 11 ms 7416 KB Output is correct
14 Correct 9 ms 7416 KB Output is correct
15 Correct 9 ms 7416 KB Output is correct
16 Correct 10 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 10 ms 7416 KB Output is correct
19 Correct 11 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7544 KB Output is correct
22 Execution timed out 3087 ms 29304 KB Time limit exceeded
23 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 16760 KB Output is correct
2 Correct 282 ms 23160 KB Output is correct
3 Correct 77 ms 12664 KB Output is correct
4 Correct 163 ms 17828 KB Output is correct
5 Correct 370 ms 23032 KB Output is correct
6 Correct 1717 ms 11640 KB Output is correct
7 Correct 127 ms 19448 KB Output is correct
8 Correct 150 ms 21496 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1779 ms 11512 KB Output is correct
11 Correct 137 ms 21468 KB Output is correct
12 Correct 1823 ms 15540 KB Output is correct
13 Correct 9 ms 7288 KB Output is correct
14 Correct 495 ms 11896 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 16760 KB Output is correct
2 Correct 282 ms 23160 KB Output is correct
3 Correct 77 ms 12664 KB Output is correct
4 Correct 163 ms 17828 KB Output is correct
5 Correct 370 ms 23032 KB Output is correct
6 Correct 1717 ms 11640 KB Output is correct
7 Correct 127 ms 19448 KB Output is correct
8 Correct 150 ms 21496 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1779 ms 11512 KB Output is correct
11 Correct 137 ms 21468 KB Output is correct
12 Correct 1823 ms 15540 KB Output is correct
13 Correct 9 ms 7288 KB Output is correct
14 Correct 495 ms 11896 KB Output is correct
15 Correct 152 ms 17240 KB Output is correct
16 Correct 226 ms 15576 KB Output is correct
17 Correct 1836 ms 16484 KB Output is correct
18 Correct 1896 ms 17608 KB Output is correct
19 Correct 73 ms 12644 KB Output is correct
20 Correct 2647 ms 23928 KB Output is correct
21 Correct 303 ms 23076 KB Output is correct
22 Correct 188 ms 17784 KB Output is correct
23 Correct 206 ms 20060 KB Output is correct
24 Correct 108 ms 14292 KB Output is correct
25 Correct 376 ms 21752 KB Output is correct
26 Correct 235 ms 20528 KB Output is correct
27 Correct 436 ms 19320 KB Output is correct
28 Correct 9 ms 7416 KB Output is correct
29 Correct 9 ms 7416 KB Output is correct
30 Correct 10 ms 7416 KB Output is correct
31 Correct 10 ms 7416 KB Output is correct
32 Correct 9 ms 7416 KB Output is correct
33 Correct 99 ms 8184 KB Output is correct
34 Correct 9 ms 7420 KB Output is correct
35 Correct 10 ms 7544 KB Output is correct
36 Correct 9 ms 7416 KB Output is correct
37 Correct 10 ms 7416 KB Output is correct
38 Correct 10 ms 7416 KB Output is correct
39 Correct 9 ms 7544 KB Output is correct
40 Correct 11 ms 7416 KB Output is correct
41 Correct 9 ms 7416 KB Output is correct
42 Correct 9 ms 7416 KB Output is correct
43 Correct 10 ms 7416 KB Output is correct
44 Correct 9 ms 7416 KB Output is correct
45 Correct 10 ms 7416 KB Output is correct
46 Correct 11 ms 7544 KB Output is correct
47 Correct 9 ms 7416 KB Output is correct
48 Correct 9 ms 7544 KB Output is correct
49 Execution timed out 3087 ms 29304 KB Time limit exceeded
50 Halted 0 ms 0 KB -