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CVD.cpp
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CVD.cpp
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#include<bits/stdc++.h>
#define ll long long
using namespace std;
char s[500][500]; int n;
void Fill(int i,int j)
{
if(s[i][j]=='O' && i<n && j<n)
{
s[i][j]='X';
if(s[i+1][j]=='O' ){
Fill(i+1,j);
s[i+1][j]='X';
}
if(s[i][j+1]=='O'){
Fill(i,j+1);
s[i][j+1]='X';
}
if(s[i-1][j]=='O'){
Fill(i-1,j);
s[i-1][j]='X';
}
if(s[i][j-1]=='O'){
Fill(i,j-1);
s[i][j-1]='X';
}
}
}
int main()
{
int i,j,ans=0;
cin>>n;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
cin>>s[i][j];
for(i=0;i<n;i++)
for(j=0;j<n;j++)
{
if(s[i][j]=='O')
{
ans++;
Fill(i,j);
}
}
cout<<ans;
return 0;
}