Submission #62073880

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#include<bits/stdc++.h>
#define ll long long
#define ss second
#define ff first
#define pb push_back
#define mod 1000000007
#define endl "\n"
using namespace std;
ll n,m,a[1005],mx,my,ix=99999999999,iy=999999999999;
char c[1005][1005];
int main(){
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    cin>>n>>m;
    for (ll i=1; i<=n; i++)
    {
        for (ll j=1; j<=m; j++)
        {cin>>c[i][j];
        if (c[i][j]=='#') {mx=max(mx,i); my=max(my,j); ix=min(ix,i); iy=min(iy,j);}
        }
 
 
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#include<bits/stdc++.h>
#define ll long long
#define ss second
#define ff first
#define pb push_back
#define mod 1000000007
#define endl "\n"
using namespace std;
ll n,m,a[1005],mx,my,ix=99999999999,iy=999999999999;
char c[1005][1005];
int main(){
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    cin>>n>>m;
    for (ll i=1; i<=n; i++)
    {
        for (ll j=1; j<=m; j++)
        {cin>>c[i][j];
        if (c[i][j]=='#') {mx=max(mx,i); my=max(my,j); ix=min(ix,i); iy=min(iy,j);}
        }
    }
    for(int i=ix; i<=mx; i++)
    {
        for(int j=iy; j<=my; j++)
        {if (c[i][j]=='.') {cout<<"No"; exit(0);}
        }
    }
    cout<<"Yes";
}

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