foo.cc: In function 'int main()':
foo.cc:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
foo.cc:51:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |   scanf("%d%d%d",&x,&y,&d);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc: In function 'void dijkstra()':
foo.cc:29:12: warning: 'mini' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |     from[j]=mini;
      |     ~~~~~~~^~~~~

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