Submission #6434952

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
#define For(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) For(i,0,n)

int main(){
  ll i,j,k,H,W,f;
  cin>>H>>W;
  ll d[4]={1,-1,-2-W,W+2};
  vector<ll> map((H+2)*(W+2),0);
  string ss;
  For(i,1,H+1){
    cin>>ss;
    For(j,1,W+1){
      if(ss[j-1]=='#')map[i*(W+2)+j]=1;
    }
  }
  rep(i,H+2){
    rep(j,W+2){
      if(map[i*(W+2)+j]){
        f=1;
        rep(k,4){
          if(map[i*(W+2)+j+d[k]])f=0;
        }
        if(f){
          cout<<"No"<<endl;
          return 0;
        }
      }
    }
  }
  cout<<"Yes"<<endl;
  return 0;
}

Submission Info

Judge Result