/*
  プログラミングのお題スレ Part13
  https://m...content-available-to-author-only...h.net/test/read.cgi/tech/1549160513
  
  >>875
*/
 
#include <stdio.h>
 
int chain(int m){
  printf(">chain %d\n", m);
  if(m <= 0){
    puts("ERROR\n");
    return(1);
  }
  printf("[ %d", m);
  while(m != 1){
    if(m & 1){
      m = m * 3 + 1;
    }else{
      m /= 2;
    }
    printf(", %d", m);
  }
  puts(" ]\n");
  return(0);
}
 
int main(void){
  chain(10);
  chain(1);
  chain(30);
  chain(0);
 
  return 0;
}

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