#include <stdio.h>
struct Yoba {
struct Peka *peka;
};
struct Peka {
struct Yoba *yoba;
};
int main(void) {
struct Yoba y;
struct Peka p;
y.peka = &p;
p.yoba = &y;
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgpzdHJ1Y3QgWW9iYSB7CglzdHJ1Y3QgUGVrYSAqcGVrYTsKfTsKCnN0cnVjdCBQZWthIHsKCXN0cnVjdCBZb2JhICp5b2JhOwp9OwoKaW50IG1haW4odm9pZCkgewoJc3RydWN0IFlvYmEgeTsKCXN0cnVjdCBQZWthIHA7Cgl5LnBla2EgPSAmcDsKCXAueW9iYSA9ICZ5OwoJcHJpbnRmKCJPS1xuIik7CglyZXR1cm4gMDsKfQo=