Submission #930404

#	Time	Username	Problem	Language	Result	Execution time	Memory
930404		Whisper	Emacs (COCI20_emacs)	C++17	50 / 50	1 ms	1628 KiB

emacs

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")

using namespace std;
using ll = long long;
using str = string;

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

const ll dx1[8] = {-1, -1, 1, 1, 0, 0, -1, 1};
const ll dy1[8] = {-1, 1, -1, 1, -1, 1, 0, 0};

const ll N = 1e6 + 5;
const ll inf = (1e9 + 5);
const ll MOD = 1e9 + 7;

char a[1001][1001];
bool visited[1001][1001];
ll n, m;
ll cnt = 0;
void DFS( ll i , ll j ){
    visited[i][j] = true;
    for (int k = 0; k < 8; k++ ){
        ll i1 = i + dx1[k];
        ll j1 = j + dy1[k];
        if ( !visited[i1][j1] && i1 >= 1 && i1 <= n && j1 >= 1 && j1 <= m && a[i1][j1] != '.'){
            DFS(i1, j1);
        }
    }
}
int main(){
     cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    for (int i = 1; i <= n ; i++ ){
        for ( int j = 1 ; j <= m ; j++ ){
            cin >> a[i][j];
        }
    }
    memset(visited, false, sizeof(visited));
    for (int i = 1; i <= n; i++ ){
        for (int j = 1; j <= m ; j++ ){
            if ( !visited[i][j] && a[i][j] == '*'){
                ++cnt;
                DFS(i, j);
            }
        }
    }
    cout << cnt;
}

• Subtask 1: 50 / 50