Submission #491272

#	Time	Username	Problem	Language	Result	Execution time	Memory
491272		Nimbostratus	Zoo (COCI19_zoo)	C++17	0 / 110	0 ms	332 KiB

zoo

#include "bits/stdc++.h"
#define endl '\n'
const int maxn = 1005;
const int inf = 2e9;
const int mod = 1e9 + 7;
using namespace std;
using lint = long long;
using pii = pair<int,int>;

int n, m;
int ans;
char g[maxn][maxn];
int t[maxn][maxn];
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};

bool check(int x, int y) {
	return x >= 0 && x < n && y >= 0 && y < m && g[x][y] != '*';
}

void dfs(int x, int y) {
	for(int a : dx)
		for(int b : dy)
			if(check(x + a, y + b) && g[x + a][y + b] == g[x][y] && !t[x + a][y + b]) {
				t[x + a][y + b] = t[x][y];
				dfs(x + a, y + b);
			}
	g[x][y] = g[x][y] == 'B' ? 'T' : 'B';
}

signed main() {
	#ifdef Local
	freopen("in.txt", "r", stdin);
	freopen("out.txt", "w", stdout);
	#endif
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cin >> n >> m;
	for(int i = 0; i < n; i++)
		cin >> g[i];
	for(int x = 0; x < n; x++)
		for(int y = 0; y < m; y++) {
			if(t[x][y] || g[x][y] == '*')
				continue;
			bool ok = false;
			for(int a : dx)
				for(int b : dy)
					if(check(x + a, y + b) && t[x + a][y + b] && g[x + a][y + b] != g[x][y]) {
						ok = true;
						t[x][y] = t[x + a][y + b];
					}
			if(!ok) {
				ans += !ok;
				t[x][y] = ans;
			}
			dfs(x, y);
		}
	cout << ans << endl;
}

• Subtask 1: 0 / 45
• Subtask 2: 0 / 65