/in/foo.cc: In function 'void dijkstra()':
/in/foo.cc:31:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(!x) return; pos[x]=0;
   ^~
/in/foo.cc:31:18: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   if(!x) return; pos[x]=0;
                  ^~~