Submission #883803

#	Time	Username	Problem	Language	Result	Execution time	Memory
883803		vjudge1	Emacs (COCI20_emacs)	C++17	50 / 50	1 ms	600 KiB

emacs

#include <bits/stdc++.h>
using namespace std;
#define sp << " " << 
#define int long long
#define vi vector<int>
#define F(xxx,yyy) for (int xxx=1;xxx<=yyy;xxx++)
#define pii pair<int,int>
const int N = 10001;
vi dad(N);

int find(int x) {
  if (x == dad[x]) return x;
  return dad[x] = find(dad[x]);
}
void unite(int x,int y) {
  dad[find(x)] = find(y);
}

void solve() {
  int n,m;
  cin >> n >> m;
  char grid[n+1][m+1];
  F(i,n){
    F(j,m) cin >> grid[i][j];
  }
  F(i,n*m) dad[i] = i;
  for (int i=1;i<=n;i++) {
    F(j,m) {
      if (grid[i][j] == '*') {
        if (i<n && grid[i+1][j] == '*') unite((i-1)*m+j,i*m+j);
        if (j<m && grid[i][j+1] == '*') unite((i-1)*m+j,(i-1)*m+j+1);
      }
    }
  }
  set<int> s;
  F(i,n) F(j,m) if (grid[i][j] == '*') s.insert(find((i-1)*m+j));
  cout << s.size() << endl; 
}
    
                  
                             
signed main() { 
  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  #ifdef Local
  freopen("in","r",stdin);
  freopen("out","w",stdout); 
  #endif
  int t = 1;
  //cin >> t;
	F(i,t) solve();
}

• Subtask 1: 50 / 50