View Compilation Error

0_0_29494866_21602.cpp:37:9: error: 'a' does not name a type
 int ans;a
         ^
0_0_29494866_21602.cpp: In function 'int main()':
0_0_29494866_21602.cpp:111:8: error: 'dfs' was not declared in this scope
   dfs(1);
        ^