#include<iostream>
using namespace std;

class A{
public:
int a;
A(int a0){a=a0;}
void inc(){a+=1;}
};

class B{
private:
int n;
public:
B(int n0){n=n0;}
void ainc(A A0){
for(int i=0;i<n;i++){ A0.inc();}
cout<<A0.a<<endl; //わはは Javaな人だとはまりそ?
}
};
int main(){
A A0(3);
B B0(2); B0.ainc(A0);
cout<<A0.a<<endl;
}