Submission #732198

#	Time	Username	Problem	Language	Result	Execution time	Memory
732198		Koful123	Emacs (COCI20_emacs)	C++17	50 / 50	1 ms	340 KiB

emacs

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

int dx[4] = {0,1,-0,-1};
int dy[4] = {-1,0,1,0};

void solve(){

	int n,m,ans = 0;
	cin >> n >> m;

	vector<string> s(n);
	vector<vector<int>> vis(n,vector<int> (m));	
	for(int i = 0; i < n; i++){
		cin >> s[i];
		for(int j = 0; j < m; j++){
			if(s[i][j] == '.'){
				vis[i][j] = 1;
			}
		}
	}

	auto check = [&](int x,int y){
		if(x < 0 || y < 0 || y >= m || x >= n) return false;
		return !vis[x][y];
	};

	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			if(vis[i][j]) continue;
			queue<pair<int,int>> q; ++ans;
			vis[i][j] = 1; q.push({i,j});
			while(q.size()){
				auto[x,y] = q.front(); q.pop();
				for(int k = 0; k < 4; k++){
					int cx = dx[k] + x,cy = dy[k] + y;
					if(check(cx,cy)){
						vis[cx][cy] = 1;
						q.push({cx,cy});
					}
				}
			}
		}
	}

	cout << ans << endl;
}
 
signed main(){ 

	ios::sync_with_stdio(0);
	cin.tie(0);
 
	int t = 1;
//	cin >> t;
 
	while(t--)
		solve();
 	
	return 0;
}

• Subtask 1: 50 / 50