Submission #851338

#	Time	Username	Problem	Language	Result	Execution time	Memory
851338		vjudge1	Patkice (COCI20_patkice)	C++17	30 / 50	1 ms	348 KiB

patkice

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

#pragma GCC optimize("Ofast,O3,unroll-loops")
#define int long long
#define vi vector<int>
#define vvi vector<vi>
#define pii pair<int, int>
#define vpi vector<pii>
#define vvpi vector<vpi>
#define vb vector<bool>
#define vvb vector<vb>
#define endl "\n"
#define sp << " " <<
#define F(i, s, n) for(int i = s; i < n; i++)
#define pb push_back
#define fi first
#define se second

int inf = LLONG_MAX >> 3;

int n, m;
string grid[100];

bool solved;
void floodfill(int y, int x) {
    if(x < 0 || y < 0 || x >= m || y >= n || grid[y][x] == '.') return;
    if(grid[y][x] == 'x') {
        solved = true;
        return;
    }
    if(grid[y][x] == '^') floodfill(y-1, x);
    if(grid[y][x] == 'v') floodfill(y+1, x);
    if(grid[y][x] == '<') floodfill(y, x-1);
    if(grid[y][x] == '>') floodfill(y, x+1);
}

void solve() {
    cin >> n >> m;
    F(i, 0, n) cin >> grid[i];
    int sy, sx;
    F(i, 0, n) {
        F(j, 0, m) {
            if(grid[i][j] == 'o') {
                sy = i; sx = j;
                break;
            }
        }
    }
    solved = false; floodfill(sy-1, sx);
    if(solved) {cout << ":)\nN" << endl; return;}
    solved = false; floodfill(sy+1, sx);
    if(solved) {cout << ":)\nS"<< endl; return;}
    solved = false; floodfill(sy, sx-1);
    if(solved) {cout << ":)\nW" << endl; return;}
    solved = false; floodfill(sy, sx+1);
    if(solved) {cout << ":)\nE" << endl; return;}
    cout << ":(" << endl;
}

void setIO() {
    ios::sync_with_stdio(0); cin.tie(0);
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif
}
signed main() {
    setIO();
    solve();
}

Compilation message (stderr)

patkice.cpp: In function 'void solve()':
patkice.cpp:56:30: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   56 |     solved = false; floodfill(sy, sx+1);
      |                     ~~~~~~~~~^~~~~~~~~~
patkice.cpp:50:30: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
   50 |     solved = false; floodfill(sy-1, sx);
      |                     ~~~~~~~~~^~~~~~~~~~

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