- <B>int</B> <B>alloc_pair(int</B> <I>fg</I><B>,</B> <B>int</B> <I>bg</I><B>);</B>
- <B>int</B> <B>find_pair(int</B> <I>fg</I><B>,</B> <B>int</B> <I>bg</I><B>);</B>
- <B>int</B> <B>free_pair(int</B> <I>pair</I><B>);</B>
+ <STRONG>int</STRONG> <STRONG>alloc_pair(int</STRONG> <EM>fg</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>bg</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>find_pair(int</STRONG> <EM>fg</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>bg</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>free_pair(int</STRONG> <EM>pair</EM><STRONG>);</STRONG>