/in/foo.c: In function 'main':
/in/foo.c:54:17: warning: comparison with string literal results in unspecified behavior [-Waddress]
             if(E=="10") 
                 ^~
/in/foo.c: In function 'DFS':
/in/foo.c:31:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^