foo.cc: In function 'void dijkstra()':
foo.cc:27:27: warning: unused variable 'd' [-Wunused-variable]
   27 |         int x=q.top().pos,d=q.top().dis;
      |                           ^
foo.cc: In function 'int main()':
foo.cc:54:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   54 |         for(int i=1;i<=n;i++)dis[i]=0x7fffffff;cnt=0;
      |         ^~~
foo.cc:54:48: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   54 |         for(int i=1;i<=n;i++)dis[i]=0x7fffffff;cnt=0;
      |                                                ^~~

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