Submission #429366

#	Time	Username	Problem	Language	Result	Execution time	Memory
429366		Pbezz	Sky Walking (IOI19_walk)	C++14	0 / 100	37 ms	5388 KiB

walk

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

using namespace std;

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

const ll MAXN = 1e4+5;
const ll INF = 1e9+7;
vector<vector<int>>has(100);
//has[i] e lista de alturas em que i e intersetado

map<pii,vector<pair<pii,int>> >adj;
//mapi[{i,j}] e vector de pares adjacente,dist
map<pii,int>dist;
//map<pii,bool>visited;
long long min_distance(std::vector<int> x, std::vector<int> h, std::vector<int> l, std::vector<int> r, std::vector<int> y, int s, int g) {

	int i,j,prev,n=x.size(),m=l.size();

	for(j=0;j<m;j++){
for(i=l[j];i<=r[j];i++){
	if(h[i]>=y[j]){
	has[i].pb(y[j]);
	}
}
	}

	for(i=0;i<n;i++){
	has[i].pb(0);
	sort(has[i].begin(),has[i].end());
	}

	for(i=0;i<n;i++){
	for(j=1;j<(int)has[i].size();j++){
	adj[{i,has[i][j]}].pb({ {i,has[i][j-1]} ,has[i][j]-has[i][j-1]});
	adj[{i,has[i][j-1]}].pb({ {i,has[i][j]} ,has[i][j]-has[i][j-1]});
	}
}

	for(j=0;j<m;j++){
prev=l[j];
for(i=l[j]+1;i<=r[j];i++){
	if(h[i]<y[j])continue;

	adj[{prev,y[j]}].pb({ {i,y[j]} , x[i]-x[prev]});
	adj[{i,y[j]}].pb({ {prev,y[j]} , x[i]-x[prev]});

prev=i;
}
	}

//dijkstra
priority_queue< pair<pii,int> >p;
	for(i=0;i<n;i++){
	for(j=0;j<(int)has[i].size();j++){
	dist[{i,has[i][j]}]=INF;
//	visited[{i,has[i][j]}]=false;
	}
}
p.push({{s,0},0});
dist[{s,0}]=0;
pii cur,a;

while(!p.empty()){
cur=p.top().first;
p.pop();

for(auto u:adj[cur]){

if(dist[u.first]>dist[cur]+u.second){
dist[u.first]=dist[cur]+u.second;
p.push({u.first,-dist[u.first]});

}


}

}



	if(dist[{g,0}]!=INF){
	return dist[{g,0}];
	}else{
	return -1;
	}
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 18
• Subtask 5: 0 / 43