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git01.cpp
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git01.cpp
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#include<bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin>>t;
while(t--)
{
int m,n;
cin>>m>>n;
char a[m][n];
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
cin>>a[i][j];
}
}
char b[m][n];
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
if((i+j)%2==0)
{
b[i][j]='G';
}
else
b[i][j]='R';
}
}
char c[m][n];
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
if((i+j)%2!=0)
{
c[i][j]='G';
}
else
c[i][j]='R';
}
}
int c1=0,c2=0;
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
if(b[i][j]!=a[i][j])
{
if(a[i][j]=='R')
{
c1+=5;
}
else if(a[i][j]=='G')
{
c1+=3;
}
}
}
}
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
if(c[i][j]!=a[i][j])
{
if(a[i][j]=='R')
{
c2+=5;
}
else if(a[i][j]=='G')
{
c2+=3;
}
}
}
}
cout<<min(c1,c2)<<endl;
}
return 0;
}