View Compilation Error

0_0_30464853_1901.cpp: In function 'int main()':
0_0_30464853_1901.cpp:43:29: error: expected primary-expression before ')' token
     memset(e, 0, sizeof edge);
                             ^
0_0_30464853_1901.cpp:44:24: error: 's' was not declared in this scope
     while(!st.empty()) s.pop();
                        ^