View Compilation Error

0_0_16264958_24179.cpp:53:1: error: 'mulset' does not name a type
 mulset<int> s;
 ^
0_0_16264958_24179.cpp: In function 'int main()':
0_0_16264958_24179.cpp:61:3: error: 's' was not declared in this scope
   s.clear();
   ^