Submission #518883

#	Time	Username	Problem	Language	Result	Execution time	Memory
518883		sudheerays123	Sightseeing (NOI14_sightseeing)	C++17	15 / 25	860 ms	209012 KiB

sightseeing

#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
#define tc ll test;cin >> test;while(test--)
#define vi vector<ll>
#define pll pair<ll,ll>
#define pb push_back
#define mp make_pair
#define INF 1e18
#define MOD 1000000007
#define ff first
#define ss second
#define in >>
#define out <<
#define space << " " <<
#define spacef << " "
#define fo(i,a,b) for(ll i = a; i <= b; i++)
#define rfo(i,a,b) for(ll i = a; i >= b; i--)
#define nextline out "\n"
#define print(x) for(auto i : x ) cout out i spacef
#define mmax(x,i) x = max(x,i)
#define mmin(x,i) x = min(x,i)
#define N 100005

vi parent(N);

void make_set(ll n){
	fo(i,1,n) parent[i] = i;
}

ll find(ll x){
	if(x == parent[x]) return x;
	return parent[x] = find(parent[x]);
}

bool add_edge(ll a , ll b){

	a = find(a);
	b = find(b);

	if(a == b) return false;

	parent[b] = a;
	return true;
}

vector<pll> new_adj[N];
vi dist(N);

void dfs(ll s , ll p){

	for(auto u : new_adj[s]){
		if(u.first == p) continue;

		dist[u.first] = min(dist[s],u.second);
		dfs(u.first,s);
	}
}

int main() {
    
    fast;

	ll n,m,q;
	cin in n in m in q;

	vector<tuple<ll,ll,ll>> edges;

	fo(i,1,m){
		ll a,b,c;
		cin in a in b in c;

		edges.pb(make_tuple(c,a,b));
	}

	make_set(n);
	sort(edges.rbegin(),edges.rend());

	for(auto u : edges){

		ll a = get<1>(u);
		ll b = get<2>(u);
		ll c = get<0>(u);

		if(add_edge(a,b)){
			new_adj[a].pb(mp(b,c));
			new_adj[b].pb(mp(a,c));
		}
	}

	dist[1] = INF;
	dfs(1,-1);

	while(q--){
		ll x;
		cin in x;

		cout out dist[x] nextline;
	}

    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 6 / 6
• Subtask 4: 0 / 10