Submission #46841271

---

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3S9b3IL ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}

void slv(){
	int n,m;
	cin>>n>>m;

	vec(string) a(n);
	rep(i,n){
		cin>>a[i];
	}

	vec(vi) usd(n,vi(m));
	const int di[]={1,-1,0,0};
	const int dj[]={0,0,1,-1};
	auto ok=[&](int i,int j)->int{
		return min(i,j)>=0 and i<n and j<m;
	};
	auto dfs=[&](auto self,int i,int j)->void{
		if(a[i][j]=='.' or usd[i][j]) return;
		usd[i][j]=1;
		rng(ni,i-1,i+2){
			rng(nj,j-1,j+2){
				if(max(abs(i-ni),abs(j-nj))!=1) continue;
				if(ok(ni,nj)){
					self(self,ni,nj);
				}
			}
		}
	};
	int ans=0;
	rep(i,n){
		rep(j,m){
			if(!usd[i][j] and a[i][j]=='#'){
				ans++;
				dfs(dfs,i,j);
			}
		}
	}
	print(ans);
}

signed main(){
_3S9b3IL;
	slv();
}

Submission Info

Compile Error

Main.cpp: In function ‘void slv()’:
Main.cpp:29:19: warning: unused variable ‘di’ [-Wunused-variable]
   29 |         const int di[]={1,-1,0,0};
      |                   ^~
Main.cpp:30:19: warning: unused variable ‘dj’ [-Wunused-variable]
   30 |         const int dj[]={0,0,1,-1};
      |                   ^~

Judge Result