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Submission #205886

# Submission time Handle Problem Language Result Execution time Memory
205886 2020-03-01T09:52:56 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=800;
	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 12 ms 7416 KB Output is correct
5 Correct 12 ms 7416 KB Output is correct
6 Correct 102 ms 8184 KB Output is correct
7 Correct 9 ms 7416 KB Output is correct
8 Correct 9 ms 7420 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 10 ms 7416 KB Output is correct
11 Correct 9 ms 7416 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 9 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 11 ms 7416 KB Output is correct
17 Correct 10 ms 7336 KB Output is correct
18 Correct 14 ms 7416 KB Output is correct
19 Correct 12 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7340 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 12 ms 7416 KB Output is correct
5 Correct 12 ms 7416 KB Output is correct
6 Correct 102 ms 8184 KB Output is correct
7 Correct 9 ms 7416 KB Output is correct
8 Correct 9 ms 7420 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 10 ms 7416 KB Output is correct
11 Correct 9 ms 7416 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 9 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 11 ms 7416 KB Output is correct
17 Correct 10 ms 7336 KB Output is correct
18 Correct 14 ms 7416 KB Output is correct
19 Correct 12 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7340 KB Output is correct
22 Execution timed out 3085 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 127 ms 16760 KB Output is correct
2 Correct 307 ms 23008 KB Output is correct
3 Correct 72 ms 12664 KB Output is correct
4 Correct 179 ms 17656 KB Output is correct
5 Correct 387 ms 23008 KB Output is correct
6 Correct 1776 ms 11532 KB Output is correct
7 Correct 131 ms 19448 KB Output is correct
8 Correct 149 ms 21460 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1766 ms 11552 KB Output is correct
11 Correct 133 ms 21568 KB Output is correct
12 Correct 1858 ms 15584 KB Output is correct
13 Correct 10 ms 7416 KB Output is correct
14 Correct 497 ms 11768 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 127 ms 16760 KB Output is correct
2 Correct 307 ms 23008 KB Output is correct
3 Correct 72 ms 12664 KB Output is correct
4 Correct 179 ms 17656 KB Output is correct
5 Correct 387 ms 23008 KB Output is correct
6 Correct 1776 ms 11532 KB Output is correct
7 Correct 131 ms 19448 KB Output is correct
8 Correct 149 ms 21460 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1766 ms 11552 KB Output is correct
11 Correct 133 ms 21568 KB Output is correct
12 Correct 1858 ms 15584 KB Output is correct
13 Correct 10 ms 7416 KB Output is correct
14 Correct 497 ms 11768 KB Output is correct
15 Correct 147 ms 17384 KB Output is correct
16 Correct 262 ms 15604 KB Output is correct
17 Correct 1837 ms 16484 KB Output is correct
18 Correct 1831 ms 17480 KB Output is correct
19 Correct 73 ms 12644 KB Output is correct
20 Correct 2634 ms 23800 KB Output is correct
21 Correct 296 ms 23032 KB Output is correct
22 Correct 175 ms 17784 KB Output is correct
23 Correct 192 ms 20060 KB Output is correct
24 Correct 96 ms 14288 KB Output is correct
25 Correct 354 ms 21880 KB Output is correct
26 Correct 238 ms 20528 KB Output is correct
27 Correct 399 ms 19196 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 12 ms 7416 KB Output is correct
32 Correct 12 ms 7416 KB Output is correct
33 Correct 102 ms 8184 KB Output is correct
34 Correct 9 ms 7416 KB Output is correct
35 Correct 9 ms 7420 KB Output is correct
36 Correct 9 ms 7416 KB Output is correct
37 Correct 10 ms 7416 KB Output is correct
38 Correct 9 ms 7416 KB Output is correct
39 Correct 9 ms 7416 KB Output is correct
40 Correct 9 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 11 ms 7416 KB Output is correct
44 Correct 10 ms 7336 KB Output is correct
45 Correct 14 ms 7416 KB Output is correct
46 Correct 12 ms 7544 KB Output is correct
47 Correct 9 ms 7416 KB Output is correct
48 Correct 9 ms 7340 KB Output is correct
49 Execution timed out 3085 ms 29304 KB Time limit exceeded
50 Halted 0 ms 0 KB -