#include <iostream>
using namespace std;
// Define LED class here
class LED {
private:
int pin;
int state;
public:
LED(int pin_num){
pin = pin_num;
state = 0;
}
void on(void){
state = 1;
}
void off(void){
state = 0;
}
void toggle(void){
state = !state;
}
int status(void){
return state;
}
};
int main() {
int pin, initialState, toggleCount;
cin >> pin >> initialState >> toggleCount;
LED led(pin);
if (initialState == 1)
led.on();
else
led.off();
for (int i = 0; i < toggleCount; i++) {
led.toggle();
}
cout << led.status();
return 0;
}