Submission #1011891

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011891		andrei_iorgulescu	Beads and wires (APIO14_beads)	C++14	0 / 100	6 ms	460 KiB

beads

#include <bits/stdc++.h>

using namespace std;

#define int long long

int inf = 2e9;

int n;
vector<pair<int,pair<int,int>>> e;
bool iau[25];
int ans;
int fr[15];

void afis()
{
    for (int i = 1; i <= n; i++)
        fr[i] = 0;
    int cst = 0;
    for (int i = 0; i < n - 1; i++)
    {
        if (!iau[i])
            continue;
        if (iau[n - 1 + i])
            fr[e[i].second.first]++;
        else
            fr[e[i].second.second]++;
        cst += e[i].first;
    }
    for (int i = 1; i <= n; i++)
        if (fr[i] != 0 and fr[i] != 2)
            return;
    ans = max(ans,cst);
}

void bkt(int pos)
{
    if (pos == 2 * n - 2)
        afis();
    else
    {
        iau[pos] = false;
        bkt(pos + 1);
        iau[pos] = true;
        bkt(pos + 1);
    }
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> n;
    for (int i = 1; i < n; i++)
    {
        int x,y,z;
        cin >> x >> y >> z;
        e.push_back({z,{x,y}});
    }
    if (n <= 2)
    {
        cout << 0;
        return 0;
    }
    bkt(0);
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 15
• Subtask 3: 0 / 29
• Subtask 4: 0 / 43