2 <category><title>C</title>
4 <category><title>C++</title>
5 <category><title>stl</title>
6 <snippet><title>algo</title>
11 <category><title>Python</title>
12 <category><title>Cat</title>
13 <snippet><title>alg</title>
17 <category><title>Snip</title>
19 <snippet><title>snip</title>