oj.uz

답안 #533504

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
533504 2022-03-06T08:18:22 Z N1NT3NDO Parkovi (COCI22_parkovi) C++17
0 / 110
 71 ms 11028 KB 
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define sz(x) (int)x.size()
#define fi first
#define sd second
#define all(x) x.begin(), x.end()
//#pragma GCC target ("avx2")
//#pragma GCC optimization ("O3")
//#pragma GCC optimization ("unroll-loops")

using namespace std;
//using namespace __gnu_pbds;

//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

const int N = (int)2e5 + 500;
vector< pair<int, int> > g[N];
int n, k, mx, mn_d;
bool have[N];

void dfs(int v, int pr, int d, int cur)
{
    if (have[v])
    {
//        if (d < mn_d)
//        {
//            mx = cur;
//            mn_d = d;
//        }
//        else if (d == mn_d) mx = min(mx, cur);

        mx = min(mx, cur);

        return;
    }

    for(auto [u, w] : g[v])
    {
        if (u == pr) continue;
        dfs(u, v, d + 1, cur + w);
    }
}

void group1()
{
    vector<int> vec;
    int ans = 1e9;
    for(int mask = 0; mask < (1 << n); mask++)
    {
        if (__builtin_popcount(mask) != k) continue;

        for(int i = 1; i <= n; i++) have[i] = 0;
        for(int i = 0; i < n; i++)
          if (mask & (1 << i))
            {
                have[i + 1] = 1;
            }


        int cur_ans = 0;
        for(int i = 1; i <= n; i++)
        {
            mx = 1e9; mn_d = 1e9;
            dfs(i, i, 0, 0);
            cur_ans = max(cur_ans, mx);
        }

        if (ans > cur_ans)
        {
            ans = cur_ans;
            vec.clear();
            for(int i = 0; i < n; i++)
              if (mask & (1 << i))
                vec.pb(i + 1);
        }
    }

    cout << ans << '\n';
    for(auto u : vec) cout << u << ' ';
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    //freopen("input.txt", "r", stdin);
    cin >> n >> k;
    for(int i = 1; i < n; i++)
    {
        int u, v, w;
        cin >> u >> v >> w;
        g[u].pb({v, w});
        g[v].pb({u, w});
    }

    if (n <= 20) group1();

}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4940 KB Output is correct
2 Correct 5 ms 5028 KB Output is correct
3 Incorrect 6 ms 4940 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 57 ms 10836 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 71 ms 11028 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4940 KB Output is correct
2 Correct 5 ms 5028 KB Output is correct
3 Incorrect 6 ms 4940 KB Output isn't correct
4 Halted 0 ms 0 KB -