/in/foo.cc: In function 'int main()':
/in/foo.cc:13:8: error: 'x' was not declared in this scope
   cin>>x>>y;
        ^
/in/foo.cc:13:11: error: 'y' was not declared in this scope
   cin>>x>>y;
           ^
/in/foo.cc:29:11: error: 'n' was not declared in this scope
  cout<<dp[n]<<'\n';
           ^