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Submission #677260

# Submission time Handle Problem Language Result Execution time Memory
677260 2023-01-02T16:54:51 Z rafatoa Patkice (COCI20_patkice) C++17
50 / 50
 1 ms 340 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
const int INF = 1e18;

void solve(){
    int n, m; cin >> n >> m;
    vector<vector<char>> a(n, vector<char>(m));

    int sx, sy;
    for(int i=0; i<n; i++)
    for(int j=0; j<m; j++){
        cin >> a[i][j];
        if(a[i][j] == 'o')
            sx = i, sy = j;
    }

    char ans; int dist = INF;
    function<void(int, int, int, char)> dfs = [&](int x, int y, int d, char c){
        if(a[x][y] == 'o' || a[x][y] == '.') return;
        if(a[x][y] == 'x'){
            if(d < dist || (d == dist && c < ans)){
                ans = c;
                dist = d;
            }
        }

        if(a[x][y] == '>') dfs(x, y+1, d+1, c);
        if(a[x][y] == '<') dfs(x, y-1, d+1, c);
        if(a[x][y] == 'v') dfs(x+1, y, d+1, c);
        if(a[x][y] == '^') dfs(x-1, y, d+1, c);
    };
    dfs(sx-1, sy, 1, 'N');
    dfs(sx, sy+1, 1, 'E');
    dfs(sx+1, sy, 1, 'S');
    dfs(sx, sy-1, 1, 'W');

    if(dist == INF) cout << ":(\n";
    else cout << ":)\n" << ans << "\n";
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    // freopen("in.txt", "r", stdin);
    // freopen("out.txt", "w", stdout);

    solve();
    return 0;
}

Compilation message

patkice.cpp: In function 'void solve()':
patkice.cpp:37:8: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   37 |     dfs(sx, sy-1, 1, 'W');
      |     ~~~^~~~~~~~~~~~~~~~~~
patkice.cpp:11:9: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 |     int sx, sy;
      |         ^~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 324 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct