Submission #990189

#	Time	Username	Problem	Language	Result	Execution time	Memory
990189		user736482	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	10 / 100	1 ms	348 KiB

adventure

#include <bits/stdc++.h>
using namespace std;

int plansza[510][510][3];//czybylo koszt stan
int m,n;
char ch;
priority_queue<pair<int,pair<int,int>>,vector<pair<int,pair<int,int>>>,greater<pair<int,pair<int,int>>>>pq;

int main()
{
    cin>>n>>m;
    plansza[n][m][2]=1;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            plansza[i+1][j+1][1]=99999999;
            cin>>ch;
            if(ch=='N')
                plansza[i+1][j+1][2]=1;
            if(ch=='E')
                plansza[i+1][j+1][2]=2;
            if(ch=='S')
                plansza[i+1][j+1][2]=3;
            if(ch=='W')
                plansza[i+1][j+1][2]=4;
        }
    }
    plansza[1][1][1]=0;
    for(int i=-1;i<2;i+=2){
        for(int j=0;j<2 && j>-2;j+=-i){
            if(plansza[1+i+j][1+j][2]!=0){
                pq.push({plansza[1][1][1]+min((plansza[1][1][2]-1-(1+i+(j!=0))+4)%4,(1-plansza[1][1][2]+(1+i+(j!=0))+4)%4),{1+i+j,1+j}});
                plansza[1+i+j][1+j][1]=plansza[1][1][1]+(plansza[1][1][2]-1-(1+i+(j!=0))+4)%4;
                //cout<<plansza[1][1][1]+(plansza[1][1][2]-1-(1+i+(j!=0))+4)%4<<" "<<1+i+j<<" "<<1+j<<" a ";
                }
                //pq.pop();}
        }
    }
    while(!pq.empty()){
        pair<int,pair<int,int>>ak=pq.top();
        vector<pair<int,pair<int,int>>>v;
        for(int i=-1;i<2;i+=2){
            for(int j=0;j<2 && j>-2;j+=-i){
                if(plansza[ak.second.first+i+j][ak.second.second+j][2]!=0 && plansza[ak.second.first+i+j][ak.second.second+j][1]>ak.first+((plansza[ak.second.first][ak.second.second][2]-1-(1+i+(j!=0)))+4)%4){
                    v.push_back({ak.first+((plansza[ak.second.first][ak.second.second][2]-1-(1+i+(j!=0)))+4)%4,{ak.second.first+i+j,ak.second.second+j}});
                    plansza[ak.second.first+i+j][ak.second.second+j][1]=ak.first+((plansza[ak.second.first][ak.second.second][2]-1-(1+i+(j!=0)))+4)%4;
                    //cout<<ak.first+((plansza[ak.second.first][ak.second.second][2]-1-(1+i+(j!=0)))+4)%4<<" "<<ak.second.first+i+j<<" "<<ak.second.second+j<<"   ";
                }
                    
                    //pq.pop();}
            }
        }
        //cout<<pq.top().first<<" "<<pq.top().second.first<<" "<<pq.top().second.second<<"\n";
        pq.pop();
        for(int i=0;i<v.size();i++)
            pq.push(v[i]);
    }
    if(plansza[n][m][1]==99999999)
        cout<<-1;
    else
        cout<<plansza[n][m][1];
    return 0;
}
/*
4 4
SEEX
XESS
SNSS
ENEX*/

Compilation message (stderr)

adventure.cpp: In function 'int main()':
adventure.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         for(int i=0;i<v.size();i++)
      |                     ~^~~~~~~~~

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