oj.uz

Submission #205887

# Submission time Handle Problem Language Result Execution time Memory
205887 2020-03-01T09:53:36 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=900;
	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 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 10 ms 7416 KB Output is correct
8 Correct 10 ms 7416 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 9 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 12 ms 7416 KB Output is correct
20 Correct 10 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 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 10 ms 7416 KB Output is correct
8 Correct 10 ms 7416 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 9 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 12 ms 7416 KB Output is correct
20 Correct 10 ms 7416 KB Output is correct
21 Correct 9 ms 7416 KB Output is correct
22 Execution timed out 3074 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 118 ms 16760 KB Output is correct
2 Correct 274 ms 23036 KB Output is correct
3 Correct 71 ms 12664 KB Output is correct
4 Correct 177 ms 17656 KB Output is correct
5 Correct 357 ms 22976 KB Output is correct
6 Correct 1713 ms 11640 KB Output is correct
7 Correct 135 ms 19448 KB Output is correct
8 Correct 145 ms 21496 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1714 ms 11640 KB Output is correct
11 Correct 134 ms 21604 KB Output is correct
12 Correct 1819 ms 15608 KB Output is correct
13 Correct 9 ms 7420 KB Output is correct
14 Correct 479 ms 11768 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 16760 KB Output is correct
2 Correct 274 ms 23036 KB Output is correct
3 Correct 71 ms 12664 KB Output is correct
4 Correct 177 ms 17656 KB Output is correct
5 Correct 357 ms 22976 KB Output is correct
6 Correct 1713 ms 11640 KB Output is correct
7 Correct 135 ms 19448 KB Output is correct
8 Correct 145 ms 21496 KB Output is correct
9 Correct 12 ms 7416 KB Output is correct
10 Correct 1714 ms 11640 KB Output is correct
11 Correct 134 ms 21604 KB Output is correct
12 Correct 1819 ms 15608 KB Output is correct
13 Correct 9 ms 7420 KB Output is correct
14 Correct 479 ms 11768 KB Output is correct
15 Correct 144 ms 17236 KB Output is correct
16 Correct 227 ms 15708 KB Output is correct
17 Correct 1806 ms 16488 KB Output is correct
18 Correct 1852 ms 17596 KB Output is correct
19 Correct 74 ms 12644 KB Output is correct
20 Correct 2601 ms 23888 KB Output is correct
21 Correct 290 ms 23160 KB Output is correct
22 Correct 192 ms 17768 KB Output is correct
23 Correct 195 ms 20196 KB Output is correct
24 Correct 95 ms 14292 KB Output is correct
25 Correct 350 ms 21752 KB Output is correct
26 Correct 228 ms 20528 KB Output is correct
27 Correct 405 ms 19192 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 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 10 ms 7416 KB Output is correct
35 Correct 10 ms 7416 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 9 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 12 ms 7416 KB Output is correct
47 Correct 10 ms 7416 KB Output is correct
48 Correct 9 ms 7416 KB Output is correct
49 Execution timed out 3074 ms 29304 KB Time limit exceeded
50 Halted 0 ms 0 KB -