#include <bits/stdc++.h>
#define int long long
#define F first
#define S second
#define T int tc; cin >> tc; while(tc--)
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;
const int inf = 1e18;
const int N = 1e6 + 5;
const int M = 505;
const int LOG = 32;
const int CHAR = 26;
const int mod = 1e9 + 7;
const int mod2 = 998244353;
const float pi = atan(1) * 4;
const int dx[] = {-1, 1, 0, 0};
const int dy[] = {0, 0, 1, -1};
const char d[] = {'W', 'E', 'S', 'N'};
int n, m;
string s[N];
bool vis[M][M];
bool inside(int x, int y) {
return x >= 1 && y >= 1 && x <= m && y <= n;
}
bool ok(int j, int i) {
if (vis[i][j]) return 0;
vis[i][j] = 1;
if (!inside(j, i)) return 0;
if (s[i][j] == '.') return 0;
if (s[i][j] == 'x') return 1;
if (s[i][j] == '>') return ok(j + 1, i);
if (s[i][j] == '<') return ok(j - 1, i);
if (s[i][j] == 'v') return ok(j, i + 1);
return ok(j, i - 1);
}
main() {
IOS
cin >> n >> m;
for(int i = 1; i <= n; i++) cin >> s[i], s[i] = '.' + s[i];
char ans;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= m; j++) {
if (s[i][j] == 'o') {
for(int ii = 0; ii <= n + 1; ii++) for(int jj = 0; jj <= m + 1; jj++) vis[ii][jj] = 0;
for(int k = 0; k < 4; k++) {
if (inside(dx[k] + j, dy[k] + i)) {
if (ok(dx[k] + j, dy[k] + i)) ans = d[k];
}
}
}
}
}
if (ans.size() == 0) cout << ":(";
else cout << ":)\n";
cout << ans;
}
Compilation message
patkice.cpp:38:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
38 | main() {
| ^~~~
patkice.cpp: In function 'int main()':
patkice.cpp:55:13: error: request for member 'size' in 'ans', which is of non-class type 'char'
55 | if (ans.size() == 0) cout << ":(";
| ^~~~
