#include<bits/stdc++.h>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
long int t,n,i,x[1000],min,sum;
cin>>t;
while(t–)
{
cin>>n;
string a[n];
sum=0;
for(i=0;i<n;i++)
{
cin>>a[i];
}
for(i=0;i<n;i++)
{
x[i]=count(a[i].begin(),a[i].begin()+n/2,‘1’) - count(a[i].begin()+n/2,a[i].begin()+n,‘1’);
sum=sum+x[i];
x[i]=abs(x[i]);
}
min=sum=abs(sum);
for(i=0;i<n;i++)
{
if(min>sum-2x[i] && sum>=2x[i])
{
min=sum-2*x[i];
}
}
cout<<min<<"\n";
}
return 0;
}
what’s wrong with my logic? Please help