/in/foo.cc: In function 'bool dp()':
/in/foo.cc:17:9: error: 'cout' was not declared in this scope
         cout<<k<<' ';
         ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:39:5: error: 'cin' was not declared in this scope
     cin>>mv>>p;
     ^~~