/in/foo.cc: In function 'int main()':
/in/foo.cc:14:20: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 #define inc(i,l,r) for(int i=l;i<=r;i++)
                    ^
/in/foo.cc:29:2: note: in expansion of macro 'inc'
  inc(i,1,n) ans=min(ans, dis[i][(1<<n)-1]);   cout<<ans<<endl; //算法复杂度：O(2^n * n^2) 
  ^~~
/in/foo.cc:29:47: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  inc(i,1,n) ans=min(ans, dis[i][(1<<n)-1]);   cout<<ans<<endl; //算法复杂度：O(2^n * n^2) 
                                               ^~~~