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Submission #205893

# Submission time Handle Problem Language Result Execution time Memory
205893 2020-03-01T09:56:45 Z mraron Cheap flights (LMIO18_pigus_skrydziai) C++14
100 / 100
 2992 ms 35704 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=200;
	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 9 ms 7416 KB Output is correct
4 Correct 9 ms 7416 KB Output is correct
5 Correct 10 ms 7416 KB Output is correct
6 Correct 102 ms 8312 KB Output is correct
7 Correct 10 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 9 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 10 ms 7416 KB Output is correct
17 Correct 9 ms 7420 KB Output is correct
18 Correct 11 ms 7416 KB Output is correct
19 Correct 11 ms 7416 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7416 KB Output is correct

Subtask #2
25.0 / 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 9 ms 7416 KB Output is correct
4 Correct 9 ms 7416 KB Output is correct
5 Correct 10 ms 7416 KB Output is correct
6 Correct 102 ms 8312 KB Output is correct
7 Correct 10 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 9 ms 7416 KB Output is correct
10 Correct 9 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 10 ms 7416 KB Output is correct
17 Correct 9 ms 7420 KB Output is correct
18 Correct 11 ms 7416 KB Output is correct
19 Correct 11 ms 7416 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7416 KB Output is correct
22 Correct 2992 ms 29432 KB Output is correct
23 Correct 2287 ms 32248 KB Output is correct
24 Correct 47 ms 8696 KB Output is correct
25 Correct 14 ms 7800 KB Output is correct
26 Correct 15 ms 7800 KB Output is correct
27 Correct 11 ms 7544 KB Output is correct
28 Correct 269 ms 19764 KB Output is correct
29 Correct 141 ms 12152 KB Output is correct
30 Correct 295 ms 13944 KB Output is correct
31 Correct 10 ms 7416 KB Output is correct
32 Correct 10 ms 7416 KB Output is correct
33 Correct 814 ms 35704 KB Output is correct
34 Correct 713 ms 31608 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 110 ms 16764 KB Output is correct
2 Correct 282 ms 23032 KB Output is correct
3 Correct 73 ms 12664 KB Output is correct
4 Correct 174 ms 17656 KB Output is correct
5 Correct 385 ms 23032 KB Output is correct
6 Correct 259 ms 11640 KB Output is correct
7 Correct 124 ms 19576 KB Output is correct
8 Correct 152 ms 21500 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 230 ms 11512 KB Output is correct
11 Correct 132 ms 21596 KB Output is correct
12 Correct 304 ms 15476 KB Output is correct
13 Correct 9 ms 7416 KB Output is correct
14 Correct 489 ms 11896 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 110 ms 16764 KB Output is correct
2 Correct 282 ms 23032 KB Output is correct
3 Correct 73 ms 12664 KB Output is correct
4 Correct 174 ms 17656 KB Output is correct
5 Correct 385 ms 23032 KB Output is correct
6 Correct 259 ms 11640 KB Output is correct
7 Correct 124 ms 19576 KB Output is correct
8 Correct 152 ms 21500 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 230 ms 11512 KB Output is correct
11 Correct 132 ms 21596 KB Output is correct
12 Correct 304 ms 15476 KB Output is correct
13 Correct 9 ms 7416 KB Output is correct
14 Correct 489 ms 11896 KB Output is correct
15 Correct 143 ms 17236 KB Output is correct
16 Correct 233 ms 15704 KB Output is correct
17 Correct 367 ms 16484 KB Output is correct
18 Correct 388 ms 17480 KB Output is correct
19 Correct 72 ms 12648 KB Output is correct
20 Correct 667 ms 23800 KB Output is correct
21 Correct 294 ms 23032 KB Output is correct
22 Correct 186 ms 17784 KB Output is correct
23 Correct 205 ms 20188 KB Output is correct
24 Correct 94 ms 14284 KB Output is correct
25 Correct 347 ms 21752 KB Output is correct
26 Correct 233 ms 20656 KB Output is correct
27 Correct 396 ms 19188 KB Output is correct
28 Correct 9 ms 7416 KB Output is correct
29 Correct 9 ms 7416 KB Output is correct
30 Correct 9 ms 7416 KB Output is correct
31 Correct 9 ms 7416 KB Output is correct
32 Correct 10 ms 7416 KB Output is correct
33 Correct 102 ms 8312 KB Output is correct
34 Correct 10 ms 7416 KB Output is correct
35 Correct 9 ms 7416 KB Output is correct
36 Correct 9 ms 7416 KB Output is correct
37 Correct 9 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 10 ms 7416 KB Output is correct
44 Correct 9 ms 7420 KB Output is correct
45 Correct 11 ms 7416 KB Output is correct
46 Correct 11 ms 7416 KB Output is correct
47 Correct 9 ms 7416 KB Output is correct
48 Correct 9 ms 7416 KB Output is correct
49 Correct 2992 ms 29432 KB Output is correct
50 Correct 2287 ms 32248 KB Output is correct
51 Correct 47 ms 8696 KB Output is correct
52 Correct 14 ms 7800 KB Output is correct
53 Correct 15 ms 7800 KB Output is correct
54 Correct 11 ms 7544 KB Output is correct
55 Correct 269 ms 19764 KB Output is correct
56 Correct 141 ms 12152 KB Output is correct
57 Correct 295 ms 13944 KB Output is correct
58 Correct 10 ms 7416 KB Output is correct
59 Correct 10 ms 7416 KB Output is correct
60 Correct 814 ms 35704 KB Output is correct
61 Correct 713 ms 31608 KB Output is correct