I am not getting what is wrong

#1

#include
#include
using namespace std;
bool compare(string a,string b){
if(a[0]==b[0]){
if(a[1]!=b[1]){
return a<b;
}
else{
return (a.size()>b.size());}
}
return a<b;
}
int main() {
int n;
cin>>n;
string a[n];
for(int i=0;i<n;i++){
cin>>a[i];
}
sort(a,a+n,compare);
for(int i=0;i<n;i++){
cout<<a[i]<<endl;
}
return 0;
}

#2

3
bat
apple
bztman

your code gives wrong answer for this test case

#3

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