#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; #define sz size() #define pb push_back #define mp make_pair #define fi first #define se second #define all(c) (c).begin(), (c).end() #define rep(i,a,b) for(long long i=(a);i<(b);++i) #define clr(a, b) memset((a), (b) ,sizeof(a)) #define MOD 1000000007 int d[1000][1000]; int main(){ int h,w; cin >> h >> w; vector v; rep(i,0,h){ string s; cin>>s; v.pb(s); } /* rep(y,0,h){ rep(x,0,w){ if(x==0&&y==0)continue; clr(d,0); rep(y1,0,h){ rep(x1,0,w){ if(y1+y>h)continue; if(x1+x>w)continue; if(v[y1][x1]=='#'&&d[y1][x1]==0&&v[y1+y][x1+x]=='#'&&d[y1+y][x1+x]==0){ //d[y1][x1] = 1; //d[y1+y][x1+x] = 1; } } } int flag = 1; rep(y1,0,h){ rep(x1,0,w){ if(v[y1][x1]=='#'&&d[y1][x1]==0){ flag = 0; } } } if(flag == 1){ cout << "YES" << endl; return 0; } } } */ cout << "NO" << endl; return 0; }