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Submission #754157

# Submission time Handle Problem Language Result Execution time Memory
754157 2023-06-07T03:21:50 Z bgnbvnbv Beads and wires (APIO14_beads) C++14
100 / 100
 155 ms 25288 KB 
#include <bits/stdc++.h>
#define ll int
#define pll pair<ll, ll>
#define pb push_back
#define fi first
#define se second
using namespace std;
const int N = 3e5 + 5;
const ll mod = 1e9 + 7;
ll n, m, a[N], b[N], dp[N], gp[N], tong;
vector<pll> adj[N];
void dfs(ll u, ll p, ll s)
{
    ll sum = 0;
    ll mx1 = -mod, mx2 = -mod;
    for (pll v : adj[u])
    {
        if (v.se == p)
            continue;
        dfs(v.se, u, v.fi);
        sum += max(dp[v.se], gp[v.se]);
        int val = dp[v.se] - max(dp[v.se], gp[v.se]) + v.fi;
        if (mx1 < val)
        {
            mx2 = mx1;
            mx1 = val;
        }
        else if (mx2 < val)
            mx2 = val;
    }
    dp[u] = sum;
    a[u] = sum;
    for (pll v : adj[u])
    {
        if (v.se == p)
            continue;
        int val = dp[u] - max(dp[v.se], gp[v.se]);
        gp[u] = max(gp[u], dp[v.se] + val + v.fi + s);
        int mx = v.fi + dp[v.se] - max(dp[v.se], gp[v.se]);
        if (mx == mx1)
            mx = mx2;
        else
            mx = mx1;
        a[u] = max(a[u], a[v.se] + val + v.fi + mx);
        a[u] = max(a[u], a[v.se] + val);
        for (pll z : adj[v.se])
        {
            if (z.se == u)
                continue;
            int valz = dp[v.se] - max(dp[z.se], gp[z.se]);
            a[u] = max(a[u], val + valz + v.fi + z.fi + a[z.se]);
        }
    }
}
void sol()
{
    cin >> n;
    for (int i = 1; i < n; i++)
    {
        ll x, y, w;
        cin >> x >> y >> w;
        adj[x].pb({w, y});
        adj[y].pb({w, x});
    }
    dfs(1, 0, 0);
    cout << a[1];
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int test = 1;
    //cin >> test;
    while (test-- > 0)
        sol();
    return 0;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB Output is correct
2 Correct 4 ms 7252 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 5 ms 7380 KB Output is correct
5 Correct 4 ms 7380 KB Output is correct
6 Correct 5 ms 7252 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7380 KB Output is correct
9 Correct 4 ms 7376 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7372 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB Output is correct
2 Correct 4 ms 7252 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 5 ms 7380 KB Output is correct
5 Correct 4 ms 7380 KB Output is correct
6 Correct 5 ms 7252 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7380 KB Output is correct
9 Correct 4 ms 7376 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7372 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 5 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7376 KB Output is correct
16 Correct 4 ms 7300 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct
19 Correct 4 ms 7380 KB Output is correct
20 Correct 4 ms 7380 KB Output is correct
21 Correct 4 ms 7380 KB Output is correct
22 Correct 4 ms 7344 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB Output is correct
2 Correct 4 ms 7252 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 5 ms 7380 KB Output is correct
5 Correct 4 ms 7380 KB Output is correct
6 Correct 5 ms 7252 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7380 KB Output is correct
9 Correct 4 ms 7376 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7372 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 5 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7376 KB Output is correct
16 Correct 4 ms 7300 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct
19 Correct 4 ms 7380 KB Output is correct
20 Correct 4 ms 7380 KB Output is correct
21 Correct 4 ms 7380 KB Output is correct
22 Correct 4 ms 7344 KB Output is correct
23 Correct 6 ms 7636 KB Output is correct
24 Correct 6 ms 7636 KB Output is correct
25 Correct 6 ms 7636 KB Output is correct
26 Correct 9 ms 7892 KB Output is correct
27 Correct 8 ms 8000 KB Output is correct
28 Correct 8 ms 8024 KB Output is correct
29 Correct 8 ms 7896 KB Output is correct
30 Correct 10 ms 8032 KB Output is correct
31 Correct 9 ms 8416 KB Output is correct

Subtask #4
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB Output is correct
2 Correct 4 ms 7252 KB Output is correct
3 Correct 5 ms 7380 KB Output is correct
4 Correct 5 ms 7380 KB Output is correct
5 Correct 4 ms 7380 KB Output is correct
6 Correct 5 ms 7252 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7380 KB Output is correct
9 Correct 4 ms 7376 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7372 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 5 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7376 KB Output is correct
16 Correct 4 ms 7300 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct
19 Correct 4 ms 7380 KB Output is correct
20 Correct 4 ms 7380 KB Output is correct
21 Correct 4 ms 7380 KB Output is correct
22 Correct 4 ms 7344 KB Output is correct
23 Correct 6 ms 7636 KB Output is correct
24 Correct 6 ms 7636 KB Output is correct
25 Correct 6 ms 7636 KB Output is correct
26 Correct 9 ms 7892 KB Output is correct
27 Correct 8 ms 8000 KB Output is correct
28 Correct 8 ms 8024 KB Output is correct
29 Correct 8 ms 7896 KB Output is correct
30 Correct 10 ms 8032 KB Output is correct
31 Correct 9 ms 8416 KB Output is correct
32 Correct 28 ms 10572 KB Output is correct
33 Correct 26 ms 10580 KB Output is correct
34 Correct 28 ms 10572 KB Output is correct
35 Correct 155 ms 20568 KB Output is correct
36 Correct 149 ms 20692 KB Output is correct
37 Correct 152 ms 20632 KB Output is correct
38 Correct 105 ms 21088 KB Output is correct
39 Correct 102 ms 20284 KB Output is correct
40 Correct 110 ms 20960 KB Output is correct
41 Correct 143 ms 25288 KB Output is correct