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Submission #382175

# Submission time Handle Problem Language Result Execution time Memory
382175 2021-03-26T16:12:02 Z mohamedsobhi777 Cheap flights (LMIO18_pigus_skrydziai) C++14
53 / 100
 1774 ms 120272 KB 
#include <bits/stdc++.h>

using namespace std;

#define vi vector<int>
#define vll vector<ll>
#define vii vector<pair<int, int>>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define loop(_) for (int __ = 0; __ < (_); ++__)
#define pb push_back
#define f first
#define s second
#define sz(_) ((int)_.size())
#define all(_) _.begin(), _.end()
#define lb lower_bound
#define ub upper_bound

using ll = long long;
using ld = long double;

const int N = 3e5 + 7;
const ll mod = 1e9 + 7;

int n, m;
ll a[N];
int viz[N], col = 1;
ll ans;
map<pii, ll> cost;
vi adj[N];
vi adj2[N];
vii e , e2 ;
ll disto[N];
int fat[N];

void dfs(int x, int p = 0, int pp = 0)
{
       viz[x] = col;
       fat[x] = p;
       for (auto u : adj[x])
       {
              if (u == p)
                     continue;
              if (viz[u] != col)
              {
                     dfs(u, x, p);
              }
              else
              {
                     e2.pb({u, x});
                     if (p && pp && u == pp)
                     {
                            ans = max(ans, cost[{p, pp}] + cost[{x, p}] + cost[{x, pp}]);
                     }
                     adj2[x].pb(u);
              }
       }
}

void dfz(int x, int p)
{
       if (p)
       {
              for (auto u : adj2[x])
              {
                     ans = max(ans, cost[{x, p}] + disto[u] + cost[{x, u}]);
              }
              for (auto u : adj2[p])
              {
                     disto[u] = -2e12;
              }
       }
       for (auto u : adj2[x])
       {
              disto[u] = cost[{x, u}];
       }

       for (auto u : adj[x])
       {
              if (fat[u] == x)
                     dfz(u, x);
       }
}

void prep(vi &act, vii &e)
{
       act.clear();
       for (auto u : e)
       {
              act.pb(u.f);
              act.pb(u.s);
       }
       for(auto u :act){
              adj[u].clear() ; 
              adj2[u].clear() ;
       }
       for(auto u : e){
              adj[u.f].pb(u.s) ; 
              adj[u.s].pb(u.f);
       }
}

int main()
{
       ios_base::sync_with_stdio(0);
       cin.tie(0);
#ifndef ONLINE_JUDGE
#endif
       cin >> n >> m;
       for (int i = 0; i < N; ++i)
              disto[i] = -2e12;

       vi act;

       for (int i = 0; i < m; ++i)
       {
              int u, v, w;
              cin >> u >> v >> w;
              a[u] += w;
              a[v] += w;
              ans = max({ans, a[u], a[v]});
              e.pb({u, v});
              cost[{u, v}] = cost[{v, u}] = w;
       }

       while (sz(e))
       {
              prep(act, e);
              for (auto u : act)
              {
                     if (viz[u] != col)
                     {
                            dfs(u, 0, 0);
                            dfz(u, 0);
                     }
              }
              e = e2;
              ++col;
              break;
       }

       cout << ans;
       return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16768 KB Output is correct
2 Correct 11 ms 16748 KB Output is correct
3 Correct 10 ms 16748 KB Output is correct
4 Correct 10 ms 16748 KB Output is correct
5 Correct 12 ms 16748 KB Output is correct
6 Correct 34 ms 20668 KB Output is correct
7 Correct 11 ms 16748 KB Output is correct
8 Correct 10 ms 16748 KB Output is correct
9 Correct 14 ms 16876 KB Output is correct
10 Correct 11 ms 16748 KB Output is correct
11 Correct 14 ms 16876 KB Output is correct
12 Correct 11 ms 16876 KB Output is correct
13 Correct 11 ms 16876 KB Output is correct
14 Correct 11 ms 16748 KB Output is correct
15 Correct 11 ms 16748 KB Output is correct
16 Correct 11 ms 16748 KB Output is correct
17 Correct 11 ms 16748 KB Output is correct
18 Correct 12 ms 17004 KB Output is correct
19 Correct 14 ms 17260 KB Output is correct
20 Correct 11 ms 16876 KB Output is correct
21 Correct 11 ms 16748 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16768 KB Output is correct
2 Correct 11 ms 16748 KB Output is correct
3 Correct 10 ms 16748 KB Output is correct
4 Correct 10 ms 16748 KB Output is correct
5 Correct 12 ms 16748 KB Output is correct
6 Correct 34 ms 20668 KB Output is correct
7 Correct 11 ms 16748 KB Output is correct
8 Correct 10 ms 16748 KB Output is correct
9 Correct 14 ms 16876 KB Output is correct
10 Correct 11 ms 16748 KB Output is correct
11 Correct 14 ms 16876 KB Output is correct
12 Correct 11 ms 16876 KB Output is correct
13 Correct 11 ms 16876 KB Output is correct
14 Correct 11 ms 16748 KB Output is correct
15 Correct 11 ms 16748 KB Output is correct
16 Correct 11 ms 16748 KB Output is correct
17 Correct 11 ms 16748 KB Output is correct
18 Correct 12 ms 17004 KB Output is correct
19 Correct 14 ms 17260 KB Output is correct
20 Correct 11 ms 16876 KB Output is correct
21 Correct 11 ms 16748 KB Output is correct
22 Correct 1774 ms 114600 KB Output is correct
23 Correct 802 ms 111268 KB Output is correct
24 Correct 45 ms 21092 KB Output is correct
25 Correct 20 ms 18156 KB Output is correct
26 Correct 20 ms 18156 KB Output is correct
27 Correct 16 ms 17260 KB Output is correct
28 Correct 610 ms 56008 KB Output is correct
29 Correct 183 ms 32736 KB Output is correct
30 Correct 330 ms 40640 KB Output is correct
31 Correct 12 ms 17004 KB Output is correct
32 Correct 11 ms 17004 KB Output is correct
33 Correct 1033 ms 112028 KB Output is correct
34 Correct 921 ms 104260 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 315 ms 52056 KB Output is correct
2 Correct 825 ms 77904 KB Output is correct
3 Correct 203 ms 37240 KB Output is correct
4 Correct 400 ms 55024 KB Output is correct
5 Correct 1237 ms 89304 KB Output is correct
6 Correct 183 ms 40408 KB Output is correct
7 Correct 275 ms 83040 KB Output is correct
8 Correct 364 ms 81104 KB Output is correct
9 Correct 15 ms 21612 KB Output is correct
10 Correct 186 ms 40448 KB Output is correct
11 Correct 411 ms 77648 KB Output is correct
12 Correct 502 ms 64284 KB Output is correct
13 Correct 11 ms 16748 KB Output is correct
14 Correct 248 ms 36576 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 315 ms 52056 KB Output is correct
2 Correct 825 ms 77904 KB Output is correct
3 Correct 203 ms 37240 KB Output is correct
4 Correct 400 ms 55024 KB Output is correct
5 Correct 1237 ms 89304 KB Output is correct
6 Correct 183 ms 40408 KB Output is correct
7 Correct 275 ms 83040 KB Output is correct
8 Correct 364 ms 81104 KB Output is correct
9 Correct 15 ms 21612 KB Output is correct
10 Correct 186 ms 40448 KB Output is correct
11 Correct 411 ms 77648 KB Output is correct
12 Correct 502 ms 64284 KB Output is correct
13 Correct 11 ms 16748 KB Output is correct
14 Correct 248 ms 36576 KB Output is correct
15 Correct 11 ms 16768 KB Output is correct
16 Correct 11 ms 16748 KB Output is correct
17 Correct 10 ms 16748 KB Output is correct
18 Correct 10 ms 16748 KB Output is correct
19 Correct 12 ms 16748 KB Output is correct
20 Correct 34 ms 20668 KB Output is correct
21 Correct 11 ms 16748 KB Output is correct
22 Correct 10 ms 16748 KB Output is correct
23 Correct 14 ms 16876 KB Output is correct
24 Correct 11 ms 16748 KB Output is correct
25 Correct 14 ms 16876 KB Output is correct
26 Correct 11 ms 16876 KB Output is correct
27 Correct 11 ms 16876 KB Output is correct
28 Correct 11 ms 16748 KB Output is correct
29 Correct 11 ms 16748 KB Output is correct
30 Correct 11 ms 16748 KB Output is correct
31 Correct 11 ms 16748 KB Output is correct
32 Correct 12 ms 17004 KB Output is correct
33 Correct 14 ms 17260 KB Output is correct
34 Correct 11 ms 16876 KB Output is correct
35 Correct 11 ms 16748 KB Output is correct
36 Correct 1774 ms 114600 KB Output is correct
37 Correct 802 ms 111268 KB Output is correct
38 Correct 45 ms 21092 KB Output is correct
39 Correct 20 ms 18156 KB Output is correct
40 Correct 20 ms 18156 KB Output is correct
41 Correct 16 ms 17260 KB Output is correct
42 Correct 610 ms 56008 KB Output is correct
43 Correct 183 ms 32736 KB Output is correct
44 Correct 330 ms 40640 KB Output is correct
45 Correct 12 ms 17004 KB Output is correct
46 Correct 11 ms 17004 KB Output is correct
47 Correct 1033 ms 112028 KB Output is correct
48 Correct 921 ms 104260 KB Output is correct
49 Correct 710 ms 56916 KB Output is correct
50 Correct 691 ms 54680 KB Output is correct
51 Correct 589 ms 58988 KB Output is correct
52 Correct 994 ms 70224 KB Output is correct
53 Correct 174 ms 35812 KB Output is correct
54 Correct 1008 ms 77512 KB Output is correct
55 Correct 755 ms 120272 KB Output is correct
56 Correct 453 ms 85692 KB Output is correct
57 Correct 539 ms 72408 KB Output is correct
58 Correct 482 ms 45784 KB Output is correct
59 Correct 1010 ms 79056 KB Output is correct
60 Incorrect 1116 ms 72272 KB Output isn't correct
61 Halted 0 ms 0 KB -