I have used Pointer method for this question but i m getting wrong ans
can anyone tell me what is the problem
#include<bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin>>t;
while(t–)
{
int a,b,diff =0 , ans= std::numeric_limits::max(), val1=0, val2=0;
cin>>a;
int ar1[a];
for(int i=0;i<a;i++)
{
cin>>ar1[i];
}
cin>>b;
int ar2[b];
for(int i=0;i<a;i++)
{
cin>>ar2[i];
}
sort(ar1,ar1+a);
sort(ar2, ar2+b);
int p1=0,p2=0;
while(p1<a && p2<b)
{
val1 = ar1[p1];
val2 = ar2[p2];
diff = abs(val1 - val2);
if(diff < ans)
{
ans = diff;
}
if(val1>val2)
{
p2++;
}
else
{
p1++;
}
}
cout<<ans<<"\n";
}
return 0;
}