#include <iostream>
using namespace std;
// Define LED class here
// <write your code>
class LED {
private:
int pin;
int state;
public:
LED(int p):pin(p){}
void on() {state=1;}
void off() {state=0;}
void toggle() {state = state^1;}
int status() {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;
}