Submission #791853

#	Time	Username	Problem	Language	Result	Execution time	Memory
791853		Piokemon	Awesome Arrowland Adventure (eJOI19_adventure)	C++17	100 / 100	69 ms	5324 KiB

adventure

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

int odw[509][509];
string kier[509];
constexpr int oo = 1073741824;
//NESWX
int d[4][4][3] = {{{-1,0,0},{0,1,1},{1,0,2},{0,-1,3}},
{{-1,0,3},{0,1,0},{1,0,1},{0,-1,2}},
{{-1,0,2},{0,1,3},{1,0,0},{0,-1,1}},
{{-1,0,1},{0,1,2},{1,0,3},{0,-1,0}}};

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,m,x,y,koszt,strona;
    string sciana(509,'X');
    cin >> n >> m;
    kier[0] = sciana;
    kier[n+1] = sciana;
    for (int i=1;i<=n;i++){
        cin >> kier[i];
        kier[i] = 'X' + kier[i] + 'X';
    }
    for( int i =0;i<=n+1;i++){
        for (int j=0;j<=m+1;j++){
            odw[i][j] = oo;
        }
    }
    priority_queue< pair<int,pair<int,int>> ,vector<pair<int,pair<int,int>>>,  greater<pair<int,pair<int,int>>> > dijks;
    dijks.push({0,{1,1}});
    odw[1][1] = 0;
    pair<int,pair<int,int>> temp;
    while(!dijks.empty()){
        temp = dijks.top();
        koszt = temp.first;
        x = temp.second.first;
        y = temp.second.second;
        dijks.pop();
        if (kier[x][y] == 'N'){
            strona = 0;
        }
        if (kier[x][y] == 'E'){
            strona = 1;
        }
        if (kier[x][y] == 'S'){
            strona = 2;
        }
        if (kier[x][y] == 'W'){
            strona = 3;
        }
        if (kier[x][y] == 'X'){
            continue;
        }
        for (int i=0;i<4;i++){
            if (odw[x + d[strona][i][0]][y + d[strona][i][1]] > odw[x][y] + d[strona][i][2]){
                odw[x + d[strona][i][0]][y + d[strona][i][1]] = odw[x][y] + d[strona][i][2];
                dijks.push({odw[x][y] + d[strona][i][2],{x + d[strona][i][0],y + d[strona][i][1]}});
            }
        }
    }
    if (odw[n][m] == oo){
        cout << "-1\n";
    }
    else{
        cout << odw[n][m] << "\n";
    }
    return 0;
}

Compilation message (stderr)

adventure.cpp: In function 'int main()':
adventure.cpp:17:17: warning: variable 'koszt' set but not used [-Wunused-but-set-variable]
   17 |     int n,m,x,y,koszt,strona;
      |                 ^~~~~
adventure.cpp:17:23: warning: 'strona' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |     int n,m,x,y,koszt,strona;
      |                       ^~~~~~

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