Submission #936227

#	Time	Username	Problem	Language	Result	Execution time	Memory
936227		VMaksimoski008	Harbingers (CEOI09_harbingers)	C++14	20 / 100	1080 ms	12980 KiB

harbingers

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

int n;
vector<vector<pii> > graph;
pii H[maxn];
vector<int> st;
ll dp[maxn], dist[maxn];

void dfs(int u, int p) {
    dp[u] = H[u].first + H[u].second * dist[u];

    for(int &id : st)
        dp[u] = min(dp[u], H[u].first + H[u].second * (dist[u] - dist[id]) + dp[id]);

    st.push_back(u);

    for(auto &[v, w] : graph[u]) {
        if(v == p) continue;
        dist[v] = dist[u] + w;
        dfs(v, u);
    }

    st.pop_back();
}

int32_t main() {
    cin >> n;
    graph.resize(n+1);
    for(int i=1; i<=n; i++) dp[i] = 1e18;
    dp[1] = 0;

    for(int i=0; i<n-1; i++) {
        int a, b, w;
        cin >> a >> b >> w;
        graph[a].push_back({ b, w });
        graph[b].push_back({ a, w });
    }

    for(int i=2; i<=n; i++) cin >> H[i].first >> H[i].second;

    dfs(1, 0);

    for(int i=2; i<=n; i++) cout << dp[i] << " ";
    return 0;
}

Compilation message (stderr)

harbingers.cpp: In function 'void dfs(int, int)':
harbingers.cpp:35:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   35 |     for(auto &[v, w] : graph[u]) {
      |               ^

• Subtask 1: 20 / 100