/in/foo.cc:11:23: error: stray '\357' in program
 int b1,a1; cin>>b1>>a1；
                       ^
/in/foo.cc:11:24: error: stray '\274' in program
 int b1,a1; cin>>b1>>a1；
                        ^
/in/foo.cc:11:25: error: stray '\233' in program
 int b1,a1; cin>>b1>>a1；
                         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:12:1: error: expected ';' before 'int'
 int aa=a,aa1=a1;
 ^~~
/in/foo.cc:15:7: error: 'aa' was not declared in this scope
 int r=aa%aa1;
       ^~
/in/foo.cc:15:10: error: 'aa1' was not declared in this scope
 int r=aa%aa1;
          ^~~
/in/foo.cc:20:11: error: 'aa1' was not declared in this scope
 int lcm=a/aa1*a1;
           ^~~