#include <iostream>
#include <stdlib.h>

int num;
void(**rptr)();

void foo() {
    if(num >= 100) exit(0);
    std::cout << ++num << std::endl;
    *rptr++ = foo;
}

int main() {
    rptr = (void(**)())alloca(sizeof(*rptr) * 200) - 1;
    foo();
    return 0;
}