Submission #692273

#	Time	Username	Problem	Language	Result	Execution time	Memory
692273		sudheerays123	Harbingers (CEOI09_harbingers)	C++17	20 / 100	13 ms	732 KiB

harbingers

#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 2500+5 , INF = 1e18 , MOD = 1e9+7;

vector<pair<ll,ll>> adj[N];
vector<ll> dist(N);

void dfs1(ll s , ll p){
	for(auto u : adj[s]){
		if(u.first == p) continue;
		dist[u.first] = dist[s]+u.second;
		dfs1(u.first,s);
	}
}

vector<ll> path,dp(N,INF),w(N),speed(N);

void dfs2(ll s , ll p){

	for(auto u : path) dp[s] = min(dp[s],w[s]+(dist[s]-dist[u])*speed[s] + dp[u]);

	path.push_back(s);

	for(auto u : adj[s]){
		if(u.first == p) continue;
		dfs2(u.first,s);
	}

	path.pop_back();
}

void solve(){

	ll n;
	cin >> n;

	for(ll i = 1; i < n; i++){
		ll a,b,c;
		cin >> a >> b >> c;
		
		adj[a].push_back(make_pair(b,c));
		adj[b].push_back(make_pair(a,c));
	}

	for(ll i = 2; i <= n; i++) cin >> w[i] >> speed[i];

	dist[1] = 0;
	dfs1(1,0);

	dp[1] = 0;
	dfs2(1,0);

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

int main(){

	fast;

	ll tc = 1;
	// cin >> tc;
	while(tc--) solve();

	return 0;
}

• Subtask 1: 20 / 100