/in/foo.cc:6:12: error: stray '\357' in program
     int n,k，x;
            ^
/in/foo.cc:6:13: error: stray '\274' in program
     int n,k，x;
             ^
/in/foo.cc:6:14: error: stray '\214' in program
     int n,k，x;
              ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:15: error: expected initializer before 'x'
     int n,k，x;
               ^
/in/foo.cc:7:13: error: 'k' was not declared in this scope
     cin>>n>>k;
             ^
/in/foo.cc:10:12: error: 'x' was not declared in this scope
       cin>>x;
            ^