/in/foo.cc: In function 'int main()':
/in/foo.cc:10:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int k=1;k<=n+1;++k)
     ^~~
/in/foo.cc:15:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  cout<<dis[1][n+1]-1<<endl;
  ^~~~