제출 #319508

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
319508		gustason	Patkice (COCI20_patkice)	C++14	30 / 50	1 ms	512 KiB

patkice

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int dx[] = {0, 1, -1, 0};
int dy[] = {-1, 0, 0, 1};
map<int, char> mp =
{
    {0,'W'},
    {1,'S'},
    {2,'N'},
    {3,'E'}
};
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int best = 1e9 + 5, ans = -1;
    int n, m, startx, starty;
    cin >> n >> m;
    char mat[n][m];
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            cin >> mat[i][j];
            if (mat[i][j] == 'o') {
                startx = i;
                starty = j;
            }
        }
    }
    for(int i = 0; i < 4; i++) {
        int length = 0;
        int x = startx + dx[i], y = starty + dy[i];
        bool reach = 0;
        while(1) {
            if (x < 0 || x >= n | y < 0 || y >= m) break;
            if (mat[x][y] == '.' || mat[x][y] == 'o') break;
            if (mat[x][y] == 'x') {
                reach = 1;
                break;
            }
            if (mat[x][y] == '<') {
                x += dx[0];
                y += dy[0];
            } else if (mat[x][y] == 'v') {
                x += dx[1];
                y += dy[1];
            } else if (mat[x][y] == '^') {
                x += dx[2];
                y += dy[2];
            } else if (mat[x][y] == '>') {
                x += dx[3];
                y += dy[3];
            }
            length++;
        }
        if (reach && length < best) {
            best = length;
            ans = i;
        }
    }
    if (ans != -1) {
        cout << ":)\n";
        cout << mp[ans] << "\n";
    } else {
        cout << ":(";
    }
    return 0;
}
//~ check for overflows

컴파일 시 표준 에러 (stderr) 메시지

patkice.cpp: In function 'int main()':
patkice.cpp:35:28: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses]
   35 |             if (x < 0 || x >= n | y < 0 || y >= m) break;
      |                          ~~^~~~
patkice.cpp:32:13: warning: 'startx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |         int x = startx + dx[i], y = starty + dy[i];
      |             ^
patkice.cpp:32:33: warning: 'starty' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |         int x = startx + dx[i], y = starty + dy[i];
      |                                 ^

• Subtask 1: 30 / 30
• Subtask 2: 0 / 20