#include <iostream>
using namespace std;
 
struct MyQuestion
{
	void fun()
	{ cout<<"a"; }
 
	void fun()const
	{ cout<<"b"; }
 
	void call()
	{
	    const_this()->fun();   // calls fun() const
 
	    fun();                 // calls fun()
	}
 
private:
    const MyQuestion *const_this() const {
        return this;
    }
};
 
int main() {
	MyQuestion q;
	q.call();
}
				I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKc3RydWN0IE15UXVlc3Rpb24KewoJdm9pZCBmdW4oKQoJeyBjb3V0PDwiYSI7IH0KCQoJdm9pZCBmdW4oKWNvbnN0Cgl7IGNvdXQ8PCJiIjsgfQoKCXZvaWQgY2FsbCgpCgl7CgkgICAgY29uc3RfdGhpcygpLT5mdW4oKTsgICAvLyBjYWxscyBmdW4oKSBjb25zdAoJCgkgICAgZnVuKCk7ICAgICAgICAgICAgICAgICAvLyBjYWxscyBmdW4oKQoJfQoKcHJpdmF0ZToKICAgIGNvbnN0IE15UXVlc3Rpb24gKmNvbnN0X3RoaXMoKSBjb25zdCB7CiAgICAgICAgcmV0dXJuIHRoaXM7CiAgICB9Cn07CgppbnQgbWFpbigpIHsKCU15UXVlc3Rpb24gcTsKCXEuY2FsbCgpOwp9