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Submission #205881

# Submission time Handle Problem Language Result Execution time Memory
205881 2020-03-01T09:45:28 Z mraron Cheap flights (LMIO18_pigus_skrydziai) C++14
28 / 100
 3000 ms 37384 KB 
#include<bits/stdc++.h>
using namespace std;
int n,m;
typedef long long ll;
struct el {
	int a,b;
	ll c;
	bool operator<(const el& masik) const {
		if(a==masik.a) return b<masik.b;
		return a<masik.a;
	}
};
vector<el> lst;
vector<pair<int, ll>> adj[300001];
ll cost(int a, int b) {
	if(a>b) swap(a,b);
	auto it=lower_bound(lst.begin(),lst.end(), el{a,b,0});
	if(it==lst.end() || it->a!=a || it->b!=b) return 0;
	return it->c;
}
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;
		lst.push_back({min(a,b),max(a,b),c});
		adj[a].push_back({b,c});
		adj[b].push_back({a,c});
	}
	sort(lst.begin(),lst.end());
	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);
	}
	
	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:46:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<adj[i].size();++j) {
                ~^~~~~~~~~~~~~~
pigus_skrydziai.cpp:47:20: 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 9 ms 7416 KB Output is correct
6 Correct 272 ms 8688 KB Output is correct
7 Correct 9 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 11 ms 7416 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 10 ms 7416 KB Output is correct
14 Correct 10 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 11 ms 7416 KB Output is correct
19 Correct 13 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7416 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 9 ms 7416 KB Output is correct
4 Correct 9 ms 7416 KB Output is correct
5 Correct 9 ms 7416 KB Output is correct
6 Correct 272 ms 8688 KB Output is correct
7 Correct 9 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 11 ms 7416 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 10 ms 7416 KB Output is correct
14 Correct 10 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 11 ms 7416 KB Output is correct
19 Correct 13 ms 7544 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 9 ms 7416 KB Output is correct
22 Execution timed out 3072 ms 37384 KB Time limit exceeded
23 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 131 ms 19812 KB Output is correct
2 Correct 340 ms 29788 KB Output is correct
3 Correct 88 ms 14180 KB Output is correct
4 Correct 201 ms 20700 KB Output is correct
5 Correct 503 ms 29444 KB Output is correct
6 Correct 235 ms 13540 KB Output is correct
7 Correct 150 ms 23516 KB Output is correct
8 Correct 180 ms 27868 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 235 ms 13568 KB Output is correct
11 Correct 144 ms 27072 KB Output is correct
12 Correct 314 ms 19420 KB Output is correct
13 Correct 9 ms 7416 KB Output is correct
14 Correct 1293 ms 13428 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 131 ms 19812 KB Output is correct
2 Correct 340 ms 29788 KB Output is correct
3 Correct 88 ms 14180 KB Output is correct
4 Correct 201 ms 20700 KB Output is correct
5 Correct 503 ms 29444 KB Output is correct
6 Correct 235 ms 13540 KB Output is correct
7 Correct 150 ms 23516 KB Output is correct
8 Correct 180 ms 27868 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 235 ms 13568 KB Output is correct
11 Correct 144 ms 27072 KB Output is correct
12 Correct 314 ms 19420 KB Output is correct
13 Correct 9 ms 7416 KB Output is correct
14 Correct 1293 ms 13428 KB Output is correct
15 Correct 169 ms 21468 KB Output is correct
16 Correct 566 ms 18912 KB Output is correct
17 Correct 379 ms 20060 KB Output is correct
18 Correct 429 ms 26716 KB Output is correct
19 Correct 73 ms 14164 KB Output is correct
20 Correct 1250 ms 28652 KB Output is correct
21 Correct 367 ms 29788 KB Output is correct
22 Correct 223 ms 20960 KB Output is correct
23 Correct 197 ms 24000 KB Output is correct
24 Correct 110 ms 17892 KB Output is correct
25 Correct 773 ms 28764 KB Output is correct
26 Correct 327 ms 28016 KB Output is correct
27 Correct 1084 ms 27484 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 9 ms 7416 KB Output is correct
33 Correct 272 ms 8688 KB Output is correct
34 Correct 9 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 11 ms 7416 KB Output is correct
39 Correct 9 ms 7416 KB Output is correct
40 Correct 10 ms 7416 KB Output is correct
41 Correct 10 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 11 ms 7416 KB Output is correct
46 Correct 13 ms 7544 KB Output is correct
47 Correct 9 ms 7416 KB Output is correct
48 Correct 9 ms 7416 KB Output is correct
49 Execution timed out 3072 ms 37384 KB Time limit exceeded
50 Halted 0 ms 0 KB -