Submission #464360

#	Time	Username	Problem	Language	Result	Execution time	Memory
464360		abc864197532	Patkice (COCI20_patkice)	C++17	30 / 50	1 ms	332 KiB

patkice

/*
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 * ###### #    # #         #    # # ## # #    #
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 */
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define info() cerr << __PRETTY_FUNCTION__ << ": " << __LINE__ << endl
void abc() {cerr << endl;}
template <typename T, typename ...U> void abc(T a, U ...b) {
    cerr << a << ' ', abc(b...);
}
template <typename T> void printv(T l, T r) {
    while (l != r) cout << *l << " \n"[++l == r];
}
template <typename A, typename B> istream& operator >> (istream& o, pair<A, B> &a) {
    return o >> a.X >> a.Y;
}
template <typename A, typename B> ostream& operator << (ostream& o, pair<A, B> a) {
    return o << '(' << a.X << ", " << a.Y << ')';
}
template <typename T> ostream& operator << (ostream& o, vector<T> a) {
    bool is = false;
    for (T i : a) {o << (is ? ' ' : '{'), is = true, o << i;}
    return o << '}';
}
template <typename T> struct vv : vector <vector <T>> {
    vv(int n, int m, T v) : vector <vector <T>> (n, vector <T>(m, v)) {}
    vv() {}
};
template <typename T> struct vvv : vector <vv <T>> {
    vvv(int n, int m, int k, T v) : vector <vv <T>> (n, vv <T>(m, k, v)) {}
    vvv() {}
};
#ifdef Doludu
#define test(args...) info(), abc("[" + string(#args) + "]", args)
#define owo void(0)
#else
#define test(args...) void(0)
#define owo ios::sync_with_stdio(false); cin.tie(0)
#endif
const int mod = 1e9 + 7, N = 200001, logN = 18, K = 1000;

int main () {
    owo;
    int n, m, x, y;
    cin >> n >> m;
    vector <string> s(n);
    for (int i = 0; i < n; ++i) {
        cin >> s[i];
        for (int j = 0; j < m; ++j) if (s[i][j] == 'o') x = i, y = j;
    }
    auto walk = [&](int x, int y) {
        vv <bool> vis(n, m, false);
        while (true) {
            if (vis[x][y]) break;
            vis[x][y] = true;
            if (s[x][y] == 'x') return true;
            else if (s[x][y] == '<') y--;
            else if (s[x][y] == '>') y++;
            else if (s[x][y] == 'v') x++;
            else if (s[x][y] == '^') x--;
            else break;
        }
        return false;
    };
    if (x + 1 < n && walk(x + 1, y)) {
        cout << ":)\nS\n";
    } else if (x && walk(x - 1, y)) {
        cout << ":)\nN\n";
    } else if (y + 1 < m && walk(x, y + 1)) {
        cout << ":)\nE\n";
    } else if (y && walk(x, y - 1)) {
        cout << ":)\nW\n";
    } else {
        cout << ":(\n";
    }
}

Compilation message (stderr)

patkice.cpp: In function 'int main()':
patkice.cpp:85:25: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   85 |     } else if (y && walk(x, y - 1)) {
      |                     ~~~~^~~~~~~~~~
patkice.cpp:85:25: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]

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