제출 #677260

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
677260		rafatoa	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	340 KiB

patkice

#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;
}

컴파일 시 표준 에러 (stderr) 메시지

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 / 30
• Subtask 2: 20 / 20