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OI-codes/AcWing/2060/2060.cpp

47 lines
1.0 KiB
C++

#include <iostream>
#include <limits>
#include <vector>
using std::cin;
using std::cout;
using std::endl;
const int N = 55;
int n, m, k;
char g[N][N];
std::vector<std::pair<int, int>> points[2];
void dfs(int x, int y, std::vector<std::pair<int, int>> &ps) {
if (x < 1 || x > n || y < 1 || y > m) return;
if (g[x][y] == '.') return;
g[x][y] = '.';
ps.push_back(std::make_pair(x, y));
dfs(x + 1, y, ps);
dfs(x - 1, y, ps);
dfs(x, y + 1, ps);
dfs(x, y - 1, ps);
}
int main() {
cin >> n >> m;
for (int i = 1; i <= n; i++) {
cin >> g[i] + 1;
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (g[i][j] == 'X') {
dfs(i, j, points[k++]);
}
}
}
int ans = std::numeric_limits<int>::max();
for (auto a : points[0]) {
for (auto b : points[1]) {
ans = std::min(ans, std::abs(a.first - b.first) + std::abs(a.second - b.second) - 1);
}
}
cout << ans << endl;
return 0;
}