guess what this one-liner does:

typedef unsigned long long int a;a x=1;a y=1;a this();int main(){printf("0\n1\n1\n");for(int i=0;i<91;i++){printf("%llu\n",this());}return 0;}a this(){x=x^y;y=x^y;x=x^y;y+=x;return y;} 

whoever guesses correct gets a peek at my youtube channel!!!!111111111!1!11111!!!1

(btw assume

#!/usr/bin/tcc -run 
#include <stdio.h>

at the beggining)