Submission #848674

#	Time	Username	Problem	Language	Result	Execution time	Memory
848674		TahirAliyev	Paths (RMI21_paths)	C++17	56 / 100	190 ms	848 KiB

Main

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long int
#define oo 1e9
#define pii pair<ll, int>

const int MAX = 2002;
int n, k;

vector<pii> g[MAX];
vector<ll> val;
int heavy[MAX];

ll dfs(int node, int p){
    pii m = {0, 0};
    for(pii to : g[node]){
        if(p == to.first) continue;
        ll a = dfs(to.first, node) + to.second;
        if(m.first < a){
            m = {a, to.first};
        }
    }
    heavy[node] = m.second;
    return m.first;
}

void dfs2(int node, int p, ll h){
    if(g[node].size() == 1 && p != node){
        val.push_back(h);
        return;
    }
    for(pii to : g[node]){
        if(p == to.first) continue;
        if(heavy[node] == to.first){
            dfs2(heavy[node], node, h + to.second);
        }
        else{
            dfs2(to.first, node, to.second);
        }
    }

}

int main(){
    scanf("%d%d", &n, &k);
    for(int i = 1; i < n; i++){
        int u, v, a; scanf("%d%d%d", &u, &v, &a);
        g[u].push_back({v, a});
        g[v].push_back({u, a});
    }
    for(int i = 1; i <= n; i++){
        val.clear();
        memset(heavy, 0, sizeof(heavy));
        dfs(i, i);
        dfs2(i, i, 0);
        sort(val.begin(), val.end());
        ll ans = 0;
        for(int i = val.size() - 1; i >= max(int(val.size() - k), 0); i--){
            ans += val[i];
        }
        cout << ans << '\n';
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:48:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:50:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         int u, v, a; scanf("%d%d%d", &u, &v, &a);
      |                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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