oj.uz

Submission #343937

# Submission time Handle Problem Language Result Execution time Memory
343937 2021-01-04T19:09:30 Z minoum Beads and wires (APIO14_beads) C++17
100 / 100
 231 ms 36700 KB 
#include<bits/stdc++.h>
 
using namespace std;
typedef long long int ll;
 
const int MAXN = 2e5 + 10;
const ll inf = (ll)1e15;
ll n, dp[5][MAXN], tmp[5][MAXN], parw[MAXN];
vector <pair<int,ll>> adj[MAXN];
 
void dfs(int v, int parv){
	tmp[0][v] = tmp[1][v] = dp[1][v] = dp[2][v] = dp[3][v] = dp[4][v] = -inf;
	dp[0][v] = 0;
	for(auto i: adj[v]){
		int u = i.first; ll w = i.second;
		if(u == parv) continue;
		parw[u] = w;
		dfs(u, v);
		ll l0 = dp[0][v], l1 = dp[1][v], l2 = dp[2][v], l3 = dp[3][v], l4 = dp[4][v];
		dp[0][v] += max(dp[0][u], dp[2][u]);
		dp[1][v] = max(l1+max(dp[0][u],dp[2][u]),l0+max(max(dp[0][u],dp[1][u]),max(dp[3][u], dp[4][u])));
		dp[2][v] = max(l2+max(dp[0][u],dp[2][u]),l0+parw[v]+w+dp[0][u]);
		dp[3][v] = max(l3+max(dp[0][u],dp[2][u]),l0+parw[v]+w+max(max(dp[0][u],dp[1][u]),dp[4][u]));
		dp[4][v] = max(tmp[0][v]+max(max(dp[0][u],dp[1][u]),dp[4][u])+w,tmp[1][v]+dp[0][u]+w);
		dp[4][v] = max(dp[4][v], l4+max(dp[0][u],dp[2][u]));
		tmp[0][v] = max(tmp[0][v]+max(dp[0][u],dp[2][u]),l0+dp[0][u]+w);
		tmp[1][v] = max(tmp[1][v]+max(dp[0][u],dp[2][u]),l0+max(max(dp[0][u],dp[1][u]),dp[4][u])+w);
	}
	return;
}
 
int32_t main()
{
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n;	
	for(int i = 0; i < n-1; i++){
		int a, b; ll w;
		cin >> a >> b >> w; a--; b--;
		adj[a].push_back({b, w});
		adj[b].push_back({a, w});
	}
	dfs(0, -1);
	cout << max(max(dp[0][0], dp[1][0]),dp[4][0]) << '\n';
	return 0; 
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 5 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 5 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 5 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 6 ms 5740 KB Output is correct
24 Correct 6 ms 5740 KB Output is correct
25 Correct 6 ms 5740 KB Output is correct
26 Correct 9 ms 6380 KB Output is correct
27 Correct 9 ms 6380 KB Output is correct
28 Correct 8 ms 6376 KB Output is correct
29 Correct 9 ms 6380 KB Output is correct
30 Correct 8 ms 6396 KB Output is correct
31 Correct 9 ms 6892 KB Output is correct

Subtask #4
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 5 ms 5100 KB Output is correct
5 Correct 4 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 6 ms 5740 KB Output is correct
24 Correct 6 ms 5740 KB Output is correct
25 Correct 6 ms 5740 KB Output is correct
26 Correct 9 ms 6380 KB Output is correct
27 Correct 9 ms 6380 KB Output is correct
28 Correct 8 ms 6376 KB Output is correct
29 Correct 9 ms 6380 KB Output is correct
30 Correct 8 ms 6396 KB Output is correct
31 Correct 9 ms 6892 KB Output is correct
32 Correct 38 ms 11500 KB Output is correct
33 Correct 38 ms 11516 KB Output is correct
34 Correct 40 ms 11500 KB Output is correct
35 Correct 224 ms 31464 KB Output is correct
36 Correct 231 ms 31340 KB Output is correct
37 Correct 228 ms 31340 KB Output is correct
38 Correct 157 ms 30676 KB Output is correct
39 Correct 154 ms 30660 KB Output is correct
40 Correct 167 ms 30536 KB Output is correct
41 Correct 219 ms 36700 KB Output is correct