Submission #920729

#	Time	Username	Problem	Language	Result	Execution time	Memory
920729		blackavar	Patkice (COCI20_patkice)	C++14	30 / 50	2 ms	2408 KiB

patkice

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

long long h[7] = {0, 1, 0, -1, 0};
long long mark[1005][1005];
char pre[1005][1005];

bool valid(long long i, char c)
{
    if (i == 0 && c == '>') return true;
    if (i == 1 && c == 'v') return true;
    if (i == 2 && c == '<') return true;
    if (i == 3 && c == '^') return true;
    return false;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long r, s;
    cin >> r >> s;
    char a[r + 1][s + 1];
    for (int i = 1; i <= r; i++)
    {
        for (int j = 1; j <= s; j++)
        {
            cin >> a[i][j];
        }
    }
    deque <pair<long long, long long>> dq;
    for (int i = 1; i <= r; i++)
    {
        for (int j = 1; j <= s; j++)
        {
            if (a[i][j] == 'o')
            {
                dq.push_back(make_pair(i, j));
                mark[i][j] = 1;
            }
        }
    }
    bool check = false;
    while (!dq.empty())
    {
        pair <long long, long long> u = dq.front();
        dq.pop_front();
        if (a[u.first][u.second] == 'x')
        {
            check = true;
            break;
        }
        for (int i = 0; i <= 3; i++)
        {
            long long newx = u.first + h[i], newy = u.second + h[i + 1];
            if (!mark[newx][newy] && newx <= r && newy <= s && newx >= 1&& newy >= 1 && a[newx][newy] != '.')
            {
                if (a[u.first][u.second] == 'o')
                {
                    if (i == 0) pre[newx][newy] = 'E';
                    if (i == 1) pre[newx][newy] = 'S';
                    if (i == 2) pre[newx][newy] = 'W';
                    if (i == 3) pre[newx][newy] = 'N';
                    dq.push_back(make_pair(newx, newy));
                }
                else
                {
                    if (valid(i, a[u.first][u.second]))
                    {
                        dq.push_back(make_pair(newx, newy));
                        mark[newx][newy] = 1;
                        pre[newx][newy] = pre[u.first][u.second];
                    }
                }
            }
        }
    }
    long long posx, posy;
    for (int i = 1; i <= r; i++)
    {
        for (int j = 1; j <= s; j++)
        {
            if (a[i][j] == 'x')
            {
                posx = i;
                posy = j;
                break;
            }
        }
    }
    if (check) cout << ":)" << "\n" << pre[posx][posy] << "\n";
    else cout << ":(";
    return 0;
}

Compilation message (stderr)

patkice.cpp: In function 'int main()':
patkice.cpp:92:54: warning: 'posy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   92 |     if (check) cout << ":)" << "\n" << pre[posx][posy] << "\n";
      |                                        ~~~~~~~~~~~~~~^
patkice.cpp:92:54: warning: 'posx' may be used uninitialized in this function [-Wmaybe-uninitialized]

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