/in/foo.cc: In function 'int main()':
/in/foo.cc:22:3: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
/in/foo.cc:24:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
    bb=bb/10;
    ^~
/in/foo.cc:38:330: warning: 'b3' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if(a1==a2 || a1==a3 || a1==b1 || a1==b2 || a1==b3 || a1==c1 || a1==c2 || a1==c3 || a2==a3 || a2==b1 || a2==b2 || a2==b3 || a2==c1 || a2==c2 || a2==c3 || a3==b1 || a3==b2 || a3==b3 || a3==c1 || a3==c2 || a3==c3 || b1==b2 || b1==b3 || b1==c1 || b1==c2 || b1==c3 || b2==b3 || b2==c1 || b2==c2 || b2==c3 || b3==c1 || b3==c2 || b3==c3 || c1==c2 || c1==c3 || c2==c3)
                                                                                                                                                                                                                                                                                                                                        ~~^~~~