View Compilation Error

0_0_30657749_2889.cpp: In function 'int main()':
0_0_30657749_2889.cpp:36:16: error: 'b' was not declared in this scope
         memset(b,0,sizeof b);
                ^
0_0_30657749_2889.cpp:69:31: error: 'class std::set<int>' has no member named 'pop'
         while(!ss.empty()) ss.pop();
                               ^