Submission #851102

#	Time	Username	Problem	Language	Result	Execution time	Memory
851102		Itamar	Paths (RMI21_paths)	C++14	36 / 100	817 ms	760 KiB

Main

// greedy cat.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
using namespace std;
#include <vector>
#define ll long long
#define pll pair<ll,ll>
#define vll vector<ll>
#include <queue>
const int siz = 2000;
vector<pll> fr[siz];
ll ans[siz];
int N,K;
#include <algorithm>
#include <set>
pll dfs(int i, vector<pll>&pad,vector<pll>&vec) {
    pll ansi={0,i};
    for (pll j: fr[i]) {
        if (j.first != pad[i].first) {
            pad[j.first] = { i,j.second };
            pll k =dfs(j.first, pad, vec);
            //s.insert({ -k.first - j.second,k.second });
            vec.push_back({ -k.first - j.second,k.second });
            ansi = max(ansi, { k.first + j.second,k.second });

        }
    }
    return ansi;
}

void calc(int r) {
    set<pll> s;
    vector<pll> vec;
    vector<pll> pad(N,{-1,-1});
    dfs(r,pad,vec);
    sort(vec.begin(), vec.end());
    for (pll p : vec)s.insert(p);
    vector<bool> vis(N);
    vis[r] = 1;
    for (int i = 0; i < K; i++) {
        if (s.empty())break;
        pll p = *s.begin();
        ans[r] -= p.first;
        ll cur = 0;
        int v = p.second;
        while (!vis[v]) {
            cur += pad[v].second;
            s.erase({ -cur, p.second });
            vis[v] = 1;
            v = pad[v].first;
        }
    }
}

int main()
{
    int n,k;
    cin >> n >> k;
    N = n, K =k;
    for (int i = 0; i < n - 1; i++) {
        int x, y, c;
        cin >> x >> y >> c;
        x--, y--;
        fr[x].push_back({ y,c });
        fr[y].push_back({ x,c });
    }
    for (int i = 0; i < n; i++) {
        calc(i);
    }
    for (int i = 0; i < n; i++)cout << ans[i] << "\n";
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file

• Subtask 1: 8 / 8
• Subtask 2: 11 / 11
• Subtask 3: 17 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 12
• Subtask 6: 0 / 32