Submission #425173

#	Time	Username	Problem	Language	Result	Execution time	Memory
425173		Pbezz	Highway Tolls (IOI18_highway)	C++14	5 / 100	333 ms	28680 KiB

highway

#include "highway.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
typedef pair<ll,ll> pii;

const ll MAXN = 2e5+5;
const ll INF = 1e9+7;
int M,k;//k = menor distancia 

vector<vector<int>>adj(MAXN);
map<pair<int,int>,int>mapi;
bool stop=false;

void dfs(ll node, ll p){if(stop)return;
bool ok=false;

for(auto u:adj[node]){if(stop)return;
if(u==p)continue;
std::vector<int> w(M);
for(ll i=0;i<M;i++)w[i]=0;

w[ mapi[{node,u}] ]=1;

if(ask(w)>k){
dfs(u,node);
ok=true;
}if(stop)return;

}
if(ok==false){
answer(0,node);
stop=true;
}

}
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
	M = U.size();
std::vector<int> w(M);
for(ll i=0;i<M;i++)w[i]=0;
	k = ask(w);



	for(ll i=0;i<N;i++){
	adj[U[i]].pb(V[i]);
	adj[V[i]].pb(U[i]);
	mapi[ {U[i],V[i]} ]=i;
	mapi[ {V[i],U[i]} ]=i;
}

	dfs(0,-1);


}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31