제출 #752744

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
752744		vqpahmad	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	0 / 100	2 ms	3032 KiB

adventure

#include<bits/stdc++.h>
using namespace std;
//#define int long long 
#define ll long long
#define pii pair<int,int>
#define F first
#define S second
#define endl '\n'
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mod = 1e9 + 7;
const int N = 1e5 + 15;
const ll inf = 1e18;
vector<pii> node[N];
int dis[N];
bool vis[N];
int nm[301][301];
int32_t main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
  int n,m;
  cin >> n >> m;
  int t = 1;
  for (int i=1;i<=n;i++){
    for (int j=1;j<=m;j++){
      nm[i][j] = t++;
    }
  }
  vector<int> hall;
  for (int i=1;i<=n;i++){
    for (int j=1;j<=m;j++){
      char x;
      cin >> x;
      int cur = nm[i][j];
      if (x=='X') {
        vis[cur] = 1;
        continue;
      }
      int u = nm[i-1][j];
      int r = nm[i][j+1];
      int d = nm[i+1][j];
      int l = nm[i][j-1];
      if (x=='N'){
        node[cur].pb({u,0});
        node[cur].pb({r,1});
        node[cur].pb({d,2});
        node[cur].pb({l,3});
      }
      if (x=='E'){
        node[cur].pb({r,0});
        node[cur].pb({d,1});
        node[cur].pb({l,2});
        node[cur].pb({u,3});
      }
      if (x=='S'){
        node[cur].pb({d,0});
        node[cur].pb({l,1});
        node[cur].pb({u,2});
        node[cur].pb({r,3});
      }
      if (x=='W'){
        node[cur].pb({l,0});
        node[cur].pb({u,1});
        node[cur].pb({r,2});
        node[cur].pb({d,3});
      }
    }
  }
  memset(dis,0x3f,sizeof(dis));
  priority_queue<pii> pq;
  pq.push({0,nm[1][1]});
  while (sz(pq)){
    int u = pq.top().S;
    int v = -pq.top().F;
    pq.pop();
    if (vis[u]) continue;
    dis[u] = v;
    vis[u] = 1;
    for (auto [it,c] : node[u]){
      if (v+c < dis[it]){
        dis[it] = v+c;
        pq.push({-dis[it],it});
      }
    }
  }
  cout << dis[nm[n][m]] << endl;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 12
• Subtask 4: 0 / 16
• Subtask 5: 0 / 50